CONSTRUCTION PANEL

Abstract

Construction panels, such as floor panels or wall panels; the panels comprising a first mechanical locking system on the respective parallel and opposite third and fourth edges (13, 14), such as long edges, configured to cooperate for horizontal and vertical locking between two adjacent construction panels (10, 20), preferably by means of a folding motion; the panels further comprising a second locking system on the respective parallel and opposite first and second edges (11, 12), such as short edges, configured to cooperate for horizontal and vertical locking of two adjacent construction panels (10, 30);a portion of the upper edge of one of the third or fourth edges (13, 14), preferably the third edge (13), comprises a first lower lip portion (139) configured to cooperate with a first upper lip portion (149) of a portion of the upper edge of the other third and fourth edges of an adjacent panel (20) when the third and fourth edges are arranged in a locking engagement.

Description

CONSTRUCTION PANEL TECHNICAL FIELD The description generally refers to the field of construction panels. BACKGROUND OF THE INVENTION Laminate flooring typically consists of a 6-12 mm fiberboard core, a 0.2-0.8 mm thick decorative laminate top layer, and a 0.1-0.6 mm thick underlayment layer of laminate, plastic, paper, or similar material. The laminate surface comprises melamine-impregnated paper. The most common core material is high-density fiberboard, which offers good stability and is generally called HDF (High-Density Fiberboard). MDF (Medium-Density Fiberboard) is sometimes also used as a core material. Laminate flooring panels of this type are mechanically joined using so-called mechanical locking systems. These systems comprise locking mechanisms that secure the panels horizontally and vertically. Mechanical locking systems are typically formed by machining the panel's web. Alternatively, the locking system components may be made of a separate material, such as aluminum or HDF, which is integrated with the flooring panel—that is, bonded to the panel during its manufacture. The main advantage of floating floors with mechanical locking systems is their ease of installation. They can also be easily removed and reused in a different location. However, existing systems have drawbacks, for example, regarding moisture control. Therefore, there is room for technical improvements. BRIEF DESCRIPTION OF THE INVENTION A general objective of this description is to provide a building panel that facilitates improved moisture control, such as water resistance. Improved moisture control may include, but is not limited to, improved sealing between assembled building panels and improved resistance to water penetration through a surface comprising assembled building panels. Another objective is to provide a construction panel that facilitates the alignment of such assembled construction panels. Therefore, another object of the present invention is to provide a construction panel that facilitates better moisture control of a row of construction panels, such as a floating floor. In particular, it is an object to provide a construction panel to improve moisture control and / or at least reduce the possibility of water penetrating the T-joints of said floor. The aforementioned objects of the embodiments of the invention can be achieved wholly or partially by means of locking systems and floor panels as described. The embodiments of the invention are evident from the description and the drawings. DEFINITION OF SOME TERMS In the following text, the visible surface of the installed floor panel is referred to as the 'front surface,' while the opposite side of the floor panel, facing the subfloor, is referred to as the 'back surface.' The 'horizontal plane' refers to a plane parallel to the front surface. The directly adjacent top portions of two neighboring joining edges of two joined floor panels together define a 'vertical plane' perpendicular to the horizontal plane. The outer portions of the floor panel at the edge, between the front and back surfaces, are called 'joint edges.' As a rule, the joint edge has several 'joint surfaces,' which can be vertical, horizontal, angled, rounded, beveled, etc. These joining surfaces are available in various materials, such as laminate, fiberboard, wood, plastic, metal (particularly aluminum), or sealing materials. 'Vertical block' means a block parallel to the vertical plane. 'Horizontal block' means a block parallel to the horizontal plane. "Up" means towards the front surface, "down" towards the back surface, "inwards" mainly horizontally towards an inner and central part of the panel, and "outwards" mainly horizontally away from the central part of the panel. The term 'locking system' refers to cooperating connection means that interconnect floor panels vertically and / or horizontally. A 'mechanical locking system' means that the locking can occur without glue. In many cases, mechanical locking systems can also be bonded with glue. A decorative topcoat is understood to be a surface layer primarily intended to give the floor its decorative appearance. A wear-resistant topcoat refers to a highly abrasive surface layer primarily designed to improve the durability of the surface layer. Therefore, a wear-resistant decorative topcoat is a layer intended to give the floor its decorative appearance as well as improve the durability of the surface layer. A topcoat is typically applied to the core. The embodiments of the present invention are especially suitable for its use Qrzrnn / zznz / E / YiAi floating floors, which are formed by floor panels mechanically joined with a locking system integrated into the floor panel, i.e., factory-assembled, consist of one or more top layers of wood or wood veneer, decorative laminate, powder-based surfaces, or decorative plastic material, an intermediate core of wood fiber-based material or plastic material, and preferably a bottom balancing layer on the back of the core. Floor panels of solid wood or with a surface layer of cork, linoleum, rubber, or soft wear layers, for example, needle-punched felt glued to a board, a printed surface, and preferably also varnished, and floors with hard surfaces such as stone, tiles, and similar materials are included. The following description of the known art, the problems of known systems and objects, and the features of the embodiments of the invention, therefore, as a non-limiting example, will be directed primarily to this field of application and in particular to panels formed as rectangular floor panels with long and short edges intended to be mechanically joined together at both the long and short edges. The long and short edges are used primarily to simplify the description of the embodiments of the invention. The panels may be square. It should be emphasized that the embodiments of the invention may be used on any floor panel and may be combined with all known types of locking systems formed on the long and / or short edges, where the floor panels are intended to be joined using a mechanical locking system that connects the panels in the horizontal and / or vertical directions on at least two adjacent edges. In one aspect of the invention, a set of similar or essentially identical construction panels, such as floor panels or wall panels, is provided. The panels comprise a first mechanical locking system on their respective parallel and opposite third and fourth edges, which are the long edges of the panel. The first mechanical locking system comprises, on the third edge, a locking groove configured to receive a first locking tab from a fourth edge of an adjacent panel by means of a folding displacement of the adjacent panel for vertical locking between two adjacent construction panels. A second locking system is located on their respective parallel and opposite first and second edges, which are the short edges of the panel. The second locking system is configured to cooperate in the horizontal and vertical locking of two adjacent construction panels, preferably by means of a vertical movement, such as vertical folding.A portion of the upper edge of one of the third or fourth edges, preferably the third edge, comprises a first lower lip portion configured to cooperate with a first upper lip portion of an upper edge portion of the other third and fourth edges of an adjacent panel when said third and fourth edges are assembled in the locked position. The first upper lip portion of the fourth edge is configured to form a tight fit around the first lower lip portion when... Qrzrnn / zznz / E / YiAi the first portion of the lower lip is received below the first portion of the upper lip in response to said folding displacement. Other advantages and embodiments are set forth in the appended dependent claims and in the detailed description. BRIEF DESCRIPTION OF THE DRAWINGS The description will be outlined below in relation to exemplary models and in greater detail with reference to the accompanying schematic drawings, in which: Figure 1 shows a schematic illustration of a floor table comprising locking systems according to known technology. Figure 2 shows a schematic illustration of the floor board from Figure 1 in the locked position with an adjacent construction panel. Figure 3 shows a schematic illustration of another floorboard that is assembled to the floorboards in Figure 2 by means of a vertical movement (vertical folding). Figures 4A to 4B show schematic illustrations of cross-sectional views of locking systems according to known technology. Figures 5A to 5C show schematic illustrations of a locking system according to modalities of the invention. Figure 6 shows a schematic cross-sectional view of the first locking system in section AA of Figure 5A according to one modality of the description. Figure 7 shows a schematic cross-sectional view of the second locking system in section BB of Figure 5C according to one modality of the description. Figure 8 is a schematic cross-sectional view of the first locking system in section CC of Figure 12 according to a modality assembled on a wall. Figure 9 is a schematic cross-sectional view of the first locking system in section DD of Figure 12 according to a modality assembled on a wall. Figure 10 shows a schematic illustration of the second locking system according to a modality that is assembled by means of a vertical movement. Figure 11 shows another schematic illustration of the second locking system of Figure 10 being assembled by means of a vertical movement. Figure 12 is a schematic illustration of an example of a modality assembled as a wall. Figure 13 is a schematic illustration of an exemplary modality assembled as a floor. αρζρηη / ζζηζ / Ε / γίΛΐ Figures 14A to 14B show cross-sections of a panel comprising a pocket according to one modality. Figures 15A to 15B show cross-sections of a panel comprising a pocket according to one modality. Figures 16A to 16B show cross-sections of a panel comprising a pocket according to one modality. Figures 17A to 17B show cross-sections of a panel comprising a pocket according to one modality. Figures 18A to 18B show cross-sections of a panel comprising a pocket according to one modality. Figures 19A to 19B show cross-sections of a panel comprising a pocket according to one modality. Figure 20A shows a panel according to a modality comprising respective lower lip portions arranged in displaced planes. Figure 20B shows cross-sections of a first edge and a second edge of two panels assembled according to the modality of Figure 20A. Figure 20C shows a cross-section of a third edge and a fourth edge of two panels assembled according to the arrangement in Figure 20A. DETAILED DESCRIPTION OF THE INVENTION ορζρηη / ζζηζ / Ε / γίΛΐ The description modes will now be outlined with reference to the accompanying schematic drawings. It should be emphasized that enhanced or different functions can be achieved using combinations of the modes. All the features can be used separately or in combination. Angles, dimensions, rounded parts, gaps between surfaces, etc. are only examples and can be adjusted within the basic principles of the invention. Figure 1 illustrates a known construction panel comprising mechanical locking systems. A mechanical locking system typically comprises a tongue and tongue groove for vertical locking and a locking element and locking groove for horizontal locking. It usually has at least four pairs of active cooperating locking surfaces: two pairs for vertical locking and two pairs for horizontal locking. The locking system also includes several other surfaces, which are generally not in contact with each other and can therefore be manufactured to considerably tighter tolerances than the cooperating locking surfaces. Laminate flooring typically consists of a core made of a 6-9 mm fiberboard, a 0.20 mm thick top surface layer, and a bottom balance layer. The surface layer provides appearance and durability to the flooring panels. The core provides stability, and the balance layer maintains the board's level when relative humidity (RH) varies throughout the year. Figure 4A illustrates, according to known technique, a typical mechanical locking system (strip lock), which can be locked at an angle (see Figure 3) and is widely used in the market, particularly for joining the respective long edges of the panels together. Figure 4A shows a vertical cross-section of a portion of the 13' long side of a 20' floor panel, as well as a portion of the 14' long side of a 10' floor panel. The bodies of the 10' and 20' floor panels can be composed of a fiberboard core, which supports a decorative and wear-resistant surface layer on its front side and a balancing layer on its back (bottom) side.The locking system has a tongue 14h' and a tongue groove 13j' that locks the panels in a vertical V direction with upper tongue surfaces 53 and lower tongue surfaces 56 cooperating with upper tongue groove surfaces 43 and lower tongue groove surfaces 46. A locking strip 13a' is formed from the body and supports a locking element 13b'. Therefore, the locking strip 13a' and the locking element 13b' constitute, in a sense, an extension of the lower portion of the tongue groove 13j'. The locking element 13b' formed in the strip 13a' has an operative locking element surface 13m' that cooperates with an operative locking groove surface 14m' in a locking groove 14g' on the opposite side of the floor panel locking groove 10'.By coupling the horizontal operating locking surfaces 13m', 14m', a horizontal locking of the floor panels 10', 20' is obtained transversely to the joining edge if the panels are separated. A second known locking system, shown in Figures 4B, can also be formed with a flexible tab lli' (folding lock) typically used on the short edges 1Γ, 12', as shown in Figures 4B, which can be displaced during locking. Such a locking system can be locked with a vertical movement as shown in Figure 3, where the first edge 11' of panel 10' is joined to the second edge 12' of panel 30' by means of a vertical movement. The sliding tab lli' is configured to cooperate with the second tab groove 12j' to lock in a vertical direction. The sliding tab lli' is a separate piece, made, for example, of plastic, and is inserted into a sliding groove 11k' on the first edge 11' of the first panel 10'. The tab lli' is pushed into a sliding groove llk' during vertical assembly of the first and second edges of the first and second panels. The sliding tab lli' springs back into the second tab groove 12j' on the second edge 12' of panel 30' when the panels have reached a locked position. A third 13' and a fourth 14' edge of the respective panels are provided with the first locking system, which allows assembly to an adjacent panel 20' by means of an angle movement to obtain a simultaneous assembly of the first 11' and second 12' edges and the third 13' and fourth 14' edge as shown in figure 3. Figures 4A to 4B show cross-sections of different modalities of known locking systems during the assembly of a first and a second panel 10', 20'. Exemplary embodiments of the invention are shown in Figures 5A to 5C and Figures 6 to 11. Referring to Figures 5A to 5C, 6, and 7, a first mechanical locking system is formed, as shown in Figure 6, with the tab 14h and the groove 13j, and is configured to be assembled by means of an angle movement. The fourth edge 14 may comprise a first locking projection 14e in the form of a locking tab, provided with a first lower edge surface 14f. Figure 1 shows an embodiment of the second locking system.7, wherein the second edge 12 is provided with a second locking protrusion 12e which may be a locking tab 12h, provided with a second lower edge surface 12f, preferably the first and second lower edge surfaces 12f, 14f are configured to cooperate with a respective of the first and second upper surfaces 11c, 13c of a first and second locking strip 13a, of adjacent panels, such as the second panel 20 shown in Figure 6 and the third panel 30 as shown, for example, in Figure 7. The first mechanical locking system may comprise a first tongue groove 13j on one of a third edge 13 or fourth edge 14, for example, the third edge 13, and a first locking tongue 14h on the other third or fourth edge, for example, the fourth edge 14. The first locking tongue 14h and the first tongue groove 13j are configured to cooperate for locking the third and fourth edges 13 and 14 in a vertical V-shaped direction. The first mechanical locking system may further comprise a first locking strip 13a on the third edge 13, provided with a first vertically projecting locking element 13b, and a first locking groove 14g on a fourth edge 14. The first locking element 13b is configured to cooperate with the first locking groove 14g to lock the third and fourth edges 13 and 14 in a horizontal direction, in particular separated from each other and perpendicular to said third and fourth edges 14. fourth edge. The second mechanical locking system is preferably formed on one of the short edges of the first panel 12, as a first edge, of similar, preferably essentially identical, panels 10, 20, 30, 40, 50. The second mechanical locking system can be configured to lock the first edge 11 of a first panel 10 to the second edge of an adjacent panel 30 in a plane, and in a vertical and / or horizontal direction perpendicular to said first and second edges, moving them closer to and further away from each other. One embodiment of the second mechanical locking system allows the first and second panels to be assembled by a vertical movement of the second edge of the adjacent panel 30 with respect to the first edge 11 of the first panel 10. This vertical movement is shown, for example, in Figures 10 and 11.The first and second mechanical locking systems are preferably formed by mechanical cutting, such as milling, drilling, and / or sawing, of the panel edges, and the second mechanical locking system may be provided with a sliding tab 11 i, preferably made of plastic. The sliding tab may be flexible and provided with protruding flexible parts, such as the sliding tabs described in documents WO2006 / 043893 and WO2007 / 015669. The sliding tab may also be configured to lock by a movement along the first and second edges, such as the sliding tabs described in documents WO2009 / 116926 and WO200 / 8004960. Referring to Figure 7, the modalities of a second locking system may comprise a second locking tab, which may be provided in the form of a movable tab lli disposed in a displacement groove llk, for example, on the first edge 11 of the first panel 10. The movable tab lli is configured to cooperate with a first tab groove 12j formed on the other of the first 11 or second edge 12, to lock the first and second edges 11, 12 in a vertical V direction. Figures 10 and 11 show another modality of the second locking system in the form of a one-piece solution combinable with the first locking system. As can be deduced from Figure 6, an upper edge portion of one of a third or fourth edge 13, 14, which may be opposite parallel edges, such as the third edge 13, may comprise a flat surface portion, which may be provided in the form of a first lower lip portion 139 configured to cooperate with, even without limitation to, receiving or matching a complementary flat surface portion, which may be provided in the form of a first upper lip portion 149, of an upper edge portion of the other of the third or fourth edge of an adjacent panel. As can be deduced from Figure 7, a portion of the upper edge of one of the first or second edges 11, 12, which may be opposite parallel edges, such as the first edge 11, may comprise a flat surface portion, which may be in the form of a second lower lip portion 119 configured to cooperate with, even without limitation to, receiving or matching a complementary flat surface portion, which may be provided in the form of a second upper lip portion 129, of one upper edge portion of the other of the first or second edge of an adjacent panel. A more outer portion of the first upper lip portion 149 may be arranged within the outermost portion of the first locking tab 14h, as shown in Figure 6. An outermost portion of the first lower lip portion 139 may be arranged within the outermost portion of the first locking strip 13a, as shown in Figure 6. An outer portion of the first lower lip portion 139 may be arranged outside the inner portion of the first tongue groove 13j, as shown in Figure 6. An upper edge portion of the fourth edge 14, preferably a long edge, may comprise a vertically extending edge portion extending from the front surface 15 followed by an inward bend, preferably a right-angled bend. This bend is followed by a horizontal flat surface, wherein the first upper lip portion 149 may comprise this horizontal flat surface. The vertically extending edge portion and the first upper lip portion may be perpendicular to each other, while the corner connecting the two portions may be rounded or chamfered. Optionally, the horizontal flat surface may additionally form a reference surface. A reference surface may be a surface that contacts the adjacent panel in a locked position and serves as a base or guide for aligning the panels with each other. An upper edge portion of the third edge 13, preferably a long edge, may comprise a vertically extending edge portion extending from the front surface followed by an elbow, preferably a right-angled elbow, outwards. This elbow is followed by a horizontal flat surface, wherein the first lower lip portion 139 may comprise this horizontal flat surface. The vertically extending edge portion and the first lower lip portion may be perpendicular to each other, while the corner connecting the two portions may be rounded. Optionally, the horizontal flat surface may additionally form a reference surface. An upper edge portion of the second edge 12, preferably a short edge, may comprise an edge portion extending vertically from the front surface 15 followed by an inward bend, preferably a right-angled bend. This bend is followed by a horizontal flat surface, wherein the second upper lip portion 129 may comprise this horizontal flat surface. The vertically extending edge portion and the second upper lip portion may be perpendicular to each other, while the corner connecting the two portions may be rounded or chamfered. Optionally, the horizontal flat surface may additionally form a reference surface. An upper edge portion of the first edge 11, preferably a short edge, may comprise an edge portion extending vertically from the front surface 15 followed by an outward bend, preferably a right-angled bend. This bend is followed by a horizontal flat surface, wherein the second lower lip portion 119 may comprise this horizontal flat surface. The vertically extending edge portion and the second lower lip portion may be perpendicular to each other, while the corner connecting the two portions may be rounded. Optionally, the horizontal flat surface may additionally form a reference surface. The outermost portion of the second lower lip portion 119 may be arranged within an outermost portion of the second locking strip lia, as shown in Figure 7. The second lower lip portion 119 may have an inward extension of a more internal portion of the second tongue groove 1 lj, as shown in Figure 11. The second upper lip portion 129 may have an extension outside the outermost portion of the second locking tab 12h, as shown in Figure 11. A more outer portion of the second lower lip portion 119 may be arranged within the outermost portion of the second locking tab lli, as shown in Figure 7. An outer portion of the second lower lip portion 119 may be disposed at least partially within an opening of the second offset slot llk, as shown in Figure 7. "Adentro" can be synonymous with "inside," in a direction toward the center of the panel. "Fuera de borda" can be synonymous with "outside," in a direction away from the center of the panel. The upper and lower lips may each comprise a reference surface configured to align the front surface 15 of the panel with the respective front surfaces 15 of the adjacent panels so as to be flush with each other when assembled in the locked position. The upper and lower lips can be flat; in particular, portions of the lips can be flat and extend parallel to each other. These lip portions preferably extend in a plane parallel to the front surface 15 of the panel. However, other configurations are also possible, such as one inclined with respect to the front surface 15. The first upper lip portion 149 of the panel can be configured to support and / or rest on the first lower lip portion 139 when adjacent panels are assembled in a locking coupling. This facilitates the improved sealing function when the panel is assembled in the locking position to one or more additional panels by means of the first locking system. The second upper lip portion 129 of the panel can be configured to support and / or rest on the second lower lip portion 119 when adjacent panels are assembled in a locking coupling. This facilitates the improved sealing function when the panel is assembled in the locking position to one or more additional panels by means of the second locking system. The first and second lower lip portions 119, 139 can form a continuous right angle with each other. The first and second upper lip portions 129, 149 can form a continuous right angle with each other. The continuous right angles can extend around the respective diagonally opposite corners of the panel. The first and second upper and lower lip portions can be in the form of a continuous rectangle. The rectangle can extend along a circumference of the panel as shown in Figure 5A. The first and second lower lip portions 119, 139 can be configured to be underneath when coupled with a respective upper lip portion 129, 149. The first and second upper lip portions 129, 149 can be configured to overlap when coupled with a respective lower lip portion 119, 139. Consequently, at least a portion of the lower lip portions 119, 139 may face upwards and at least a portion of the upper lip portions 129, 149 may face downwards. The first edge 11 and the third edge 13 may each comprise a vertically extending surface extending from the front surface 15 of the panel. The lower lip portions 119, 139 may, in combination with the respective vertically extending surface, form an inwardly recessed shape, such as an inwardly recessed right-angle surface. The second edge 12 and the fourth edge 14 may each comprise a vertically extending surface extending from the front surface 15 of the panel. The upper lip portions 129, 149 may, in combination with the respective vertically extending surface, form an outwardly recessed shape, such as a right-angled surface complementing the respective inwardly recessed lower lip portions, as shown in Figures 6 to 11. The respective upper and / or lower lip portions may comprise a material that facilitates sealing, including, but not limited to, a polymer, rubber, silicone, adhesives, Vax or similar. In a preferred embodiment, the respective first and second parts of the lower lip 119 and 139 are provided on the first short edge 11 and the third long edge 13 of panel 10, and the respective first and second parts of the upper lip 129, 149 are provided on the second short edge 12 and the fourth long edge 14 respectively, as shown, for example, in figures 6, αρζρηη / ζζηζ / E / γίΛΐ 7, 10 and 11. Consequently, because the respective first and second parts of the upper lip 129,149 can cooperate with the respective first and second parts of the lower lip 119, 139, even to rest on them, the configuration can generate the technical advantage that the weight of the panel pushes the respective first and second parts of the upper lip 129, 149 towards the respective first and second parts of the lower lip 119, 139, so the weight of the panel can contribute to the sealing function and thus facilitate a better seal. This means that in some embodiments, the first lower edge surface 14f and the first upper surface 13c of two adjacent panels may not support each other when the two adjacent panels are assembled in the locked position. Therefore, a gap may exist between at least part of the first lower edge surface 14f and the first upper surface 13c of two adjacent panels when they are assembled in the locked position. However, in some embodiments, the first lower edge surface 14f and the first upper surface 13c of two adjacent panels can support each other when the two adjacent panels are assembled in the locked position by means of the first locking system. Referring to Figure 6, the first locking tab 14h, the first tab groove 13j, and the first lip portions 139, 149 can be configured to deflect the first upper lip portion 149 toward the first lower lip portion 139 when a respective third edge 13 and fourth edge 14 are mounted in the locking position. This configuration can facilitate ensuring that the first upper lip portion 149 is always loaded toward the first lower lip portion 139 when one or more panels are assembled in the locking position. The first locking system may comprise a first locking tab 14h and a first tab groove 13j. The first lower lip portion 139 is preferably disposed between the first tab groove 13j and the front surface 15 of the panel. The first upper lip portion 149 is preferably disposed between the first locking tab 14h and the front surface 15 of the panel. Referring to Figure 7, one of the first or second edge 11,12, for example the first edge 11, may in some embodiments comprise a movable, preferably flexible, tab configured to allow mounting of panels by vertical folding. The movable tab may be configured to cooperate with the second tab groove 12j to deflect the second upper lip portion 129 against the second lower lip portion 119, thereby facilitating an improved sealing function. The second locking system may comprise a second locking tab 12h and a second tab groove 12j. The second lower lip portion 119 is preferably arranged between the second tab groove 12j and the front surface 15 of the panel. The second upper lip portion 129 is preferably arranged between the second locking tab 12h and the front surface 15 of the panel. As can be deduced, for example, from Figures 6 to 11, the provision of a pair of lip portions, such as the first lower and upper lip portions 139, 149 and / or the second lower and upper lip portions 119, 129, each pair 119, 129; 139, 149, can respectively form a mechanical labyrinth seal. This configuration can therefore be particularly advantageous for preventing moisture penetration between the edges 11, 12 and / or between the edges 13, 14 respectively, such as between the front surface 15 and the locking tab lli, 12h or 14h or the tab groove llj, 12j, 13j, or from the front surface 15 to the rear surface 16. Referring to Figures 8 and 12, which show an exemplary embodiment where the panels are assembled as a wall, i.e., the panels are used as wall panels, the arrangement of lip portions 119, 129, 139, 149 between the locking tongue lli, 12h, 14h and / or the locking groove llj, 12j, 13j and the front surface 15 may allow one or more of the lip portions of the pair, i.e., 119, 129; 139, 149, to provide mechanical obstructions, for example, to a fluid such as water. Therefore, a fluid such as water flowing along the front surface 15 in a downward vertical direction, when acted upon by the gravitational force, may be prevented from passing through parts of the lip, such as the first part of the lower lip 139 in a direction from the front surface 15 to the rear surface 16. In particular, the first part of the lower lip 139 can provide, for example, for a fluid such as water, a mechanical obstacle that extends in a direction opposite to the direction of the gravitational force. Therefore, a fluid such as water flowing along the front surface 15 in a downward vertical direction, when acted upon by the gravitational force, will be prevented from flowing upwards and over the first portion of the lower lip 139. The first portion of the lower lip 139 and the first portion of the upper lip 149 can mutually define a reference plane Dp as illustrated in Figure 10. The second portion of the lower lip 119 and the second portion of the upper lip 129 can respectively define a reference plane Dp as illustrated in Figure 7. The first, second, third and fourth lip portions 119,129,139,149 can be configured to define a reference plane Dp. The first, second, third and fourth lip portions 119,129,139,149 can essentially extend in a common plane, which can be the reference plane Dp. The reference plane Dp can facilitate the alignment of the respective front surfaces αρζρηη / ζζηζ / E / γίΛΐ of adjacent panels when mounted in the locked position so that the respective front surfaces 15 of adjacent panels are arranged flush with each other. The first portion of the lower lip 139 may preferably be arranged between the first tongue groove 13j and the front surface 15 of the panel. The first portion of the upper lip 149 may preferably be arranged between the first locking tab 14h and the front surface 15 of the panel. As explained above and shown in Figure 7, one of the first or second edges may, depending on the modalities, comprise a second locking tab lli, such as a movable locking tab configured to move linearly in a displacement slot llk, and the other of the first and second edges comprise a second tab slot 12j to receive said second locking tab. The second lower lip portion 119 may preferably be arranged in a vertical V-shaped position between the second locking tab lli and the front surface 15 of the panel. The second upper lip portion 129 may preferably be arranged in a vertical V-shaped position between the second tab groove 12j and the front surface 15 of the panel. Alternatively, as shown in Figures 10 and 11, the second lower lip portion 119 can be arranged in a vertical V-shaped position between a second tongue groove 1lj of the first edge 11 and the front surface 15 of the panel. The second upper lip portion 129 can be arranged in a vertical V-shaped position between a second tongue 12h of the second edge 12 and the front surface 15 of the panel. The first portion of the lower lip 139 may be contiguous to the second portion of the lower lip 119. The first portion of upper lip 149 may be contiguous, preferably continuous with the second portion of upper lip 129. Lip portions 119,129,139,149 can be contiguous with each other so that they extend continuously along the first, second, third, and fourth edges. Because lip portions 119, 129, 139, 149 overlap and underlie each other in a complementary manner, they can continuously define the reference plane Dp along the first, second, third, and fourth edges when a panel is assembled with similar panels in locking position along all edges 11, 12, 13, 14. In this way, improved sealing can be facilitated. The function of the lip portions can thus be twofold; having the function of aligning the respective front surfaces of the panels and / or providing the continuous seal along the circumference of the panel together with the respective matching lip portions of adjacent panels when assembled in a locked position on the four edges of the panel. αρζρηη / ζζηζ / Ε / γίΛΐ The lip portions can be formed contiguous to each other, thus continuously defining the reference plane Dp along the circumference of the panel. In this way, when a panel is assembled in a locked position with other essentially similar panels along all four edges, continuous contact is achieved by mating or closed lip portions 119, 129; 139, 149 along essentially the entire circumference of the panel. This facilitates a continuous seal along the circumference of the panel. With reference to figure 7, preferably, the edges of the panel comprising a locking strip may comprise a respective lower lip portion, i.e., the first edge 11 and the third edge 13. Referring, for example, to figures 6 to 7 and 10 to 11, preferably, the edges of the panel comprising a locking strip may comprise a respective lower lip portion, i.e., the first edge 11 and the third edge 13. The panel 10 may comprise a surface layer 15a provided on the front surface 15 and preferably a backing layer 16a provided on the rear surface 16. Typically, the surface layer comprises a decorative layer configured to be visible when the panels are assembled into a floor. Such a decorative layer is well known in the art and may be provided in various forms, including, but not limited to, printed paper, powder, printed powder, or veneer, such as wood veneer. The surface layer, which may also provide a protective layer, normally comprises a binding resin, such as a thermosetting resin, which facilitates bonding, i.e., adhesion between, inter alia, the decorative layer and the panel core. The binder may also facilitate the bonding of one or more additives, such as pigments and / or surface hardening particles, to provide the surface layer with various properties.The binder may comprise, for example, melamine formaldehyde. The binder can penetrate the core of the panel during manufacturing. Typically, the binder is supplied in powder form, which liquefies upon exposure to heat. Therefore, the binder can penetrate the core of the building panel. The core may comprise, for example, MDF, HDF, wood, stone, ceramic, PVC, plastics, or other materials. The bonding agent can penetrate to a depth of depth into the panel core, in the Z-thickness direction, from the front surface 15 of the panel and into the core. This feature provides an improved seal between the respective upper and lower lip portions. The depth of penetration can be at least in the first portions of the lower and upper lips 139,149. This provides a first, more airtight locking system. The depth of penetration can be at least in the second portions of the lower and upper lips 119,129. This provides a second, more airtight locking system. Consequently, the aspects of this description may be particularly suitable for use in humid spaces, such as bathrooms, kitchens, or similar. Accordingly, the aspects of the present description may be suitable for use as floor panels, as illustrated, for example, in Figures 6 to 7, 10 to 11 and 13. Accordingly, the aspects of the present description may be suitable for use as wall panels, as illustrated, for example, in Figures 8 to 9 and 12. It should be noted that the provision and configuration of the upper and lower lip portions 119, 129, 139, 149, as described herein, particularly when configured continuously along all edges of a panel, is not limited to use with a specific locking system, but can be implemented with virtually any mechanical locking system and on construction panels of any material. The locking system described above serves merely as an example of possible implementation methods. Referring to Figures 12 and 13, a panel, such as the first panel 10, can be joined to an adjacent second panel 20 along its fourth long edge 14 by means of the first locking system, for example, by an angle movement, thus creating a long-side-to-long-side joint. Panel 10 can also be joined with one of its short edges 11 to an adjacent third panel 30 by means of the second locking system, for example, its third long edge 13 to another fourth panel 40 by means of the first locking system, for example, by an angle movement, thus creating an additional long-side-to-long-side joint. The two additional panels 20 and 40 are positioned on opposite sides of the short-side joint. The resulting panel configuration is a typical floor arrangement when assembled, for example, a floating floor as shown in Figure 13 or a wall, as shown in Figure 12.As a derivable configuration, it comprises two T-joints. Each T-joint comprises a long-side-to-long-side joint (between a third edge 13 and a fourth edge 14) and a short-side-to-short-side joint (between a first edge 11 and a second edge 12). Thus, the set of similar or essentially identical panels can be assembled in a locked position to comprise a first T-joint TI and a second T-joint TT2, as shown, for example, in Figure 13. To improve the sealing between assembled layers of panels comprising a panel assembled in a locking position on all four sides, i.e., the four edges, as a floor layer (see figure 13), it would be desirable to improve the water protection of both T-joints. Thanks to the fact that the construction panel has the characteristics set out in this document, and in the attached claims, it is possible to facilitate an improvement in the sealing of both joints in TT1 and T2. ορζρηη / ζζηζ / Ε / γίΛΐ Figures 14A to 14B, 15A to 15B, 16A to 16B, 17A to 17B, 18A to 18B, and 19A to 19B illustrate different pocket configurations that can be combined with any of the configurations described herein. The pockets can be configured to receive a sealant, such as a fluid or vax. Providing one or more pockets can facilitate improved joint sealing between adjacent panels when configured in the assembled position. Vax pockets can cooperate to control the flow of sealant through the joint when adjacent panels are assembled, such as from the pocket in one direction through the joint to the front surface 15 and / or the back surface 16. In Figures 14A to 14B, an upper edge portion of the fourth edge 14, as a long edge, comprises a vertically extending edge portion 184 extending from the front surface 15 followed by a bend, preferably a right-angle bend, inward toward the center of the panel. The bend may be a right-angle chamfered bend as shown in Figures 14A to 14B. The bend is followed by a horizontal flat surface, wherein the first upper lip portion 149 may comprise said horizontal flat surface. A portion of the upper edge of the third edge 13, such a long edge, may comprise a vertically extending portion of the edge 182 extending from the front surface 15 followed by a bend, preferably a right-angled bend, projecting outward in a direction from the center of the panel. The bend is followed by a horizontal flat surface; the first portion of the lower lip 139 may comprise this horizontal flat surface. A pocket 111 is provided in the third edge 13 between the vertically extending portion of the edge 182 and the flat surface. The pocket 111 extends downward vertically toward the rear surface 16. The pocket 111 extends below the horizontal flat surface. The pocket 111 opens upward toward the front surface 15. In Figures 15A to 15B, an upper edge portion of the fourth edge 14, such as a long edge, comprises a vertically extending edge portion 184 extending from the front surface 15 followed by a bend, preferably a right-angle bend, inward toward the center of the panel. The bend may be a right-angle chamfered bend. The bend is followed by a horizontal flat surface, wherein the first upper lip portion 149 may comprise said horizontal flat surface. A portion of the upper edge of the third edge 13, such a long edge, may comprise a vertically extending portion of the edge 182 extending from the front surface 15 followed by a bend, preferably a right-angled bend, outward in a direction from the center of the panel. The bend is followed by a horizontal flat surface; the first portion of the lower lip 139 may comprise this horizontal flat surface. A pocket 112 is provided in the third edge 13 between the vertically extending portion of the edge 182 and the horizontal flat surface. The pocket 112 extends laterally in a horizontal direction toward the center of the panel 20 comprising the third edge 13. The pocket 112 preferably does not extend below the horizontal flat surface. The pocket 112 opens laterally in a direction away from the third edge 13. In Figures 16A to 16B, an upper edge portion of the fourth edge 14, such as a long edge, comprises a vertically extending edge portion 184 extending from the front surface 15 followed by a bend, preferably a right-angle bend, inward toward the center of the panel. The bend may be a right-angle chamfered bend. The bend is followed by a horizontal flat surface, wherein the first upper lip portion 149 may comprise said horizontal flat surface. A portion of the upper edge of the third edge 13, such a long edge, may comprise a vertically extending portion of the edge 182 extending from the front surface 15 followed by a bend, preferably a right-angled bend, outward in a direction from the center of the panel. The bend is followed by a horizontal flat surface; the first portion of the lower lip 139 may comprise this horizontal flat surface. A pocket 113 is provided in the third edge 13 between the vertically extending portion of the edge 182 and the horizontal flat surface. The pocket 113 extends toward the third edge in a direction that is angled with respect to the vertically extending portion of the edge 182, at an angle between 15 and 75 degrees, or at an angle of 45 degrees. The pocket 113 may extend below the horizontal flat surface.Pocket 113 opens at least partially to one side in a direction away from the third edge 13. Pocket 113 can have an opening that corresponds to the length (in the side view of Figure 16B) of a chamfer. In Figures 17A to 17B, an upper edge portion of the fourth edge 14, as a long edge, comprises a vertically extending edge portion 184 extending from the front surface 15 followed by an elbow, preferably a right-angle elbow, inward toward the center of the panel comprising the fourth edge 14. The elbow may be a right-angle chamfered elbow. The elbow is followed by a horizontal flat surface, wherein the first upper lip portion 149 may comprise said horizontal flat surface. A portion of the upper edge of the third edge 13, such a long edge, may comprise a vertically extending portion of the edge 182 extending from the front surface 15 followed by a first contiguous inward bend in the third edge 13, such as a 10-20 degree bend. The first bend is followed by a second contiguous bend, such as an acute bend, extending outward in a direction from the center of the panel. The second bend is followed by a contiguous horizontal flat surface, the first portion of the lower lip 139 being able to comprise such a horizontal flat surface. A pocket 114 is therefore provided in the third edge 13 between the vertically extending portion of the edge 182 and the horizontal flat surface. The pocket 114 extends to the third edge. The pocket 114 preferably does not extend below the horizontal flat surface.Pocket 114 opens at least partially to one side in a direction away from the third edge 13. Pocket 114 may have an opening that is larger than the length (in the side view of Figure 17B) of a chamfer. In Figures 18A to 18B, an upper edge portion of the fourth edge 14, such as a long edge, comprises a vertically extending edge portion 184 extending from the front surface 15 followed by a bend, preferably a right-angle bend, inward toward the center of the panel comprising the fourth edge 14. The bend may be a right-angle chamfered bend. The bend is followed by a horizontal flat surface, wherein the first upper lip portion 149 may comprise said horizontal flat surface. A top edge portion of the third edge 13, such a long edge, may comprise a vertically extending edge portion 182 extending from the front surface 15 followed by an adjacent sharp bend extending outward in a direction away from the center of the panel. The bend is followed by an adjacent flat surface; the first lower lip portion 139 may comprise such a horizontal flat surface. The flat surface may form an angle with a horizontal plane H. A pocket 115 is therefore provided in the third edge 13 between the adjacent flat surface and the first upper lip portion 149. The pocket 115 opens at least partially to one side in a direction away from the third edge 13. The pocket 115 may have an opening that is greater than the length (in the side view of Figure 18B) of a chamfer. In Figures 19A to 19B, an upper edge portion of the fourth edge 14, such as a long edge, comprises a vertically extending edge portion 184 extending from the front surface 15 followed by a bend, preferably a right-angled bend, directed inward toward the center of the panel. The bend is a chamfered edge between the vertically extending edge portion 184 and the first upper lip portion 149. The chamfered edge provides a first pocket 116 between the third edge 13 and the fourth edge 14. The bend is followed by a horizontal flat surface, wherein the first upper lip portion 149 may comprise said horizontal flat surface. A portion of the upper edge of the third edge 13, such a long edge, may comprise a vertically extending portion of the edge 182 extending from the front surface 15 followed by a bend, preferably a right-angled bend, outward in a direction from the center of the panel. The bend is followed by a horizontal flat surface; the first portion of the lower lip 139 may comprise such a horizontal flat surface. A second pocket 116' is provided in the vertically extending portion of the edge 182. The second pocket 116' then extends laterally in a horizontal direction toward the center of the panel 20 comprising the third Qrzrnn / zznz / E / YiAi edge 13. The second pocket 116' cannot extend below the horizontal flat surface. The second pocket 116' opens laterally in the opposite direction to the third edge 13. The second pocket 116' opens at least partially to the first pocket 116 and is therefore at least partially in direct fluid communication with the first pocket 116 when the third edge 13 is configured in the assembled position with the fourth edge 14. Although pockets 111, 112, 113, 114, 115, 116, 116' have been explained in relation to the third edge 13 and the fourth edge 14 of the panel, as long edges, it should be appreciated that the corresponding pockets can be formed between the first edge 11 and the second edge of the panel, as short edges. Figure 20A shows a modality in which the first portion of lower lip 139 is arranged in a foreground plane H1 (see Figure 20C) and the second portion of lower lip 119 is arranged in a background plane H2 (see Figure 20B) being displaced from the foreground plane H1. In a preferred embodiment, the first plane H1 can be positioned from 0 to 0.5 mm below the second plane H2, preferably from 0.2 to 0.5 mm below the second plane H2, more preferably around 0.3 mm. These distance intervals between H1 and H2 can be advantageously combined with panels having a total thickness, in the T-direction of the thickness, between 4 and 6 mm. Therefore, the second lower lip portion 119 is disposed above the first lower lip portion 139 and closer to the front surface 15 than the first lower lip portion 139. This modality can be advantageously combined with any of the pocket modality modes 111, 112, 113, 114 described in relation to figures 14A to 14B, 15A to 15B, 16A to 16B, 17A to 17B, 18A to 18B or 19A to 19B. In a further preferred embodiment, the first plane H1 can be positioned 0 to 1 mm below the second plane H2, preferably around 0 to 1 mm, more preferably 0.6 mm. These distance intervals between H1 and H2 can be advantageously combined with panels having a total thickness, in the direction of thickness T, of at least 7 mm, as in the interval of 7 mm and 20 mm. Therefore, the second lower lip portion 119 is disposed above the first lower lip portion 139 and closer to the front surface 15 than the first lower lip portion 139. This modality can be advantageously combined with any of the pocket modality modes 111, 112, 113, 114 described in relation to figures 14A to 14B, 15A to 15B, 16A to 16B, 17A to 17B, 18A to 18B or 19A to 19B. By configuring the second lower lip portion 119 in a second plane H2 that is disposed on the plane of the first lower lip portion 139, it can be facilitated that a fluid, such as water, can flow from the second lower lip portion 119 to the first lower lip portion 139. The fluid can flow under the action of gravity. αρζρηη / ζζηζ / Ε / γίΛΐ By configuring the second lower lip portion 119 in a second plane H2 arranged on the plane of the first lower lip portion 139, improved resistance to water penetration can be facilitated in a floor comprising a plurality of panels according to the modality configured in an assembled position. Figure 20B shows a modality in which the second portion of upper lip 129 and the second portion of lower lip 119 are arranged in a second plane H2 Figure 20C shows an embodiment in which the first part of the upper lip 149 and the first part of the lower lip 139 are arranged in a foreground H1 when the panels are configured in the assembled position, as when a third edge 13 is configured in the assembled position with a fourth edge. 14 POINTS POINT 1. A set of similar or essentially identical building panels, such as floor panels or wall panels, comprising a first mechanical locking system on the respective parallel and opposite third and fourth edges 13, 14, as the long edges, configured to cooperate for locking between two adjacent building panels 10, 20, preferably by means of a folding motion, and a second locking system on the respective parallel and opposite first and second edges 11, 12, as the short edges, configured to cooperate for locking two adjacent building panels 10, 30, wherein an upper edge portion of one of the long edges of the panel, such as a third or fourth edge 13, 14, preferably the third edge 13,It comprises a first lower lip portion 139 configured to cooperate with a first upper lip portion 149 of an upper edge portion of the other of the third and fourth edges of an adjacent panel 20 when said third and fourth edges are assembled in the locking position. POINT 2. The assembly according to point 1, wherein the first locking system is configured to cooperate in the horizontal and vertical locking between two adjacent building panels 10, 20, preferably by means of a folding motion. POINT 3. The assembly according to point 1 or 2, wherein the second locking system is configured to cooperate in the horizontal and / or vertical locking of two adjacent building panels 10, 30, preferably by means of a vertical movement, such as vertical folding. POINT 4. The assembly according to any of points 1 to 3, wherein an upper edge portion of one of the short edges of the panel, such as the first or second edge, comprises a second lower lip portion 119 configured to cooperate with a second upper lip portion 129 of an upper edge portion of the other first and second edges of an adjacent panel 30 when said first and second edges are assembled in a locking position. POINT 5. The assembly according to point 4 above, wherein lip portions 119, 129, 139, 149 each comprise a flat horizontal surface. POINT 6. The assembly in accordance with any of the above points 4 to 5, wherein the first portion of lower lip 139 is continuous with the second portion of lower lip 119, preferably the first portion of upper lip 149 is continuous with the second portion of upper lip 129. POINT 7. The assembly according to any of the above points 4 to 6, wherein said lip portions 119, 129, 139, 149 continuously define a reference plane Dp, preferably along the first, second, third and fourth edges when a panel is assembled with similar panels in a locked position along all edges 11, 12, 13, 14. POINT 8. The set according to any of the above points 4 to 7, wherein said lip portions 119, 129, 139, 149 are contiguous with each other so that they extend continuously along the first, second, third and fourth edges. POINT 9. The assembly according to any of the above points 4 to 8, wherein the first upper lip portion 149 is configured to rest on the first lower lip portion 139 when the adjacent panels are assembled in the locked position by means of the first locking system. POINT 10. The assembly according to any of the above points 4 to 9, wherein the second upper lip portion 129 is configured to rest on the second lower lip portion 119 when the adjacent panels are assembled in the locked position by means of the second locking system. POINT 11. The assembly according to any of the preceding points 4 to 10, wherein the first system and the locking system each comprise a locking tab lli, 12h, 14h and a tab groove llj, 12j, 13j, wherein said lip portions 119, 129, 139, 149 are arranged between said locking tab or tab groove and the front surface 15 of the panel. POINT 12. The assembly in accordance with any of the above elements 4 to 11, wherein a portion of the upper edge of the second edge 12 and / or the fourth edge 14 comprises a vertically extending edge portion extending from the front surface 15 followed by an inwardly contiguous bend toward a center of the panel, preferably said bend being followed by a horizontal flat surface. αρζρηη / ζζηζ / Ε / γίΛΐ POINT 13. The assembly according to any of the above elements 4 to 12, wherein a portion of the upper edge of the first edge 11 and / or the third edge 13 comprises a vertically extending edge portion extending from the front surface 15 followed by an adjacent elbow outward away from the center of the panel, preferably said elbow being followed by a horizontal flat surface. POINT 14. The assembly according to any of the above points 12 or 13, wherein said elbow comprises a right-angle elbow. POINT 15. The set in accordance with any of the above points 4 to 14, wherein the first portion of lower lip 139 is continuous with the second portion of lower lip 119. POINT 16. The set in accordance with any of the above points 4 to 15, wherein the first part of the upper lip 149 is continuous with the second part of the upper lip 129. POINT 17. The set in accordance with any of the above elements 4 to 16, in which the second part of the lower lip 119 is contiguous to the first part of the upper lip 149. POINT 18. The set according to any of the above points 4 to 17, wherein the second part of the upper lip 129 is contiguous to the first part of the lower lip 139. POINT 19. The assembly according to any of the preceding points 4 to 18, wherein said first and second part of the upper and lower lips 119, 129, 139, 149 define a reference plane Dp to align the front surface 15 of the construction panel with the front surface (15) of an adjacent construction panel. POINT 20. The assembly according to any of the preceding points 4 to 19, wherein one of the first or second edges comprises a second locking tab lli, as a movable locking tab configured to move linearly in a displacement groove llk, and the other of the first and second edges comprises a second tab groove 12j to receive said second locking tab, wherein lip portions (119,129, 139,149) are arranged between the first tab groove and the front surface 15 of the panel. POINT 21. The assembly in accordance with any of the preceding points 4 to 20, wherein said lip portions 119, 129, 139, 149 are contiguous with each other, preferably extending continuously along the first, second, third and fourth edges and / or continuously defining the reference plane Dp along the first, second, third and fourth edges when a panel is assembled with similar panels in a locked position along all edges 11, 12, 13, 14. POINT 22. The set according to any of the points above 4 to 21, in the Qrzrnn / zznz / E / YiAi that the first, second, third, and fourth lip portions extend essentially in a common plane. POINT 23. The assembly according to any of the above points 1 to 22, wherein the panel comprises a surface layer 15a, said surface layer comprising a binder, such as a thermosetting resin. POINT 24. The assembly according to the previous point, wherein said binder 18 has a depth of penetration into a core 17 of the panel in a direction transverse to the front surface 15. POINT 25. The set according to the previous point, in which said depth of penetration extends and includes at least part of the lip portions. POINT 26. The assembly in accordance with any of the above points 23 to 25, wherein the surface layer 15a is a protective surface layer and / or a decorative surface layer. POINT 27. The assembly according to any of the preceding points 23 to 26, wherein the surface layer 15a comprises one or more of a coating, pigments, cellulose fiber. POINT 28. The assembly according to any of the points above 23 to 27, wherein the binder comprises a thermosetting material, such as melamine formaldehyde. POINT 29. The assembly according to any of the above points 24 to 28, wherein said core 17 comprises one or more of MDF, HDF, wood, stone, ceramic, PVC, plastics. POINT 30. The assembly according to any of the above points 1 to 5, 9-14, 20, 24-29, in which the first part of the lower lip 139 is arranged in a foreground plane H1 and the second part of the lower lip 119 is arranged in a background plane, plane H2 is displaced from the foreground plane H1. POINT 31. The assembly according to the previous point, in which the first plane H1 and the second plane H2 are essentially flush. POINT 32. The assembly according to point 30, wherein the first plane H1 is arranged 0.2 to 0.5 mm below the second plane H2, preferably around 0.3 mm, more preferably 0.3 mm. POINT 33. The assembly according to the previous point, where the thickness of the panel is in the range of 4 to 6 mm. POINT 34. The assembly according to point 30, wherein the first plane H1 is arranged from 0 to 2 mm below the second plane H2, preferably from 0 to 1 mm below, more preferably 0.6 mm below. POINT 35. The assembly according to the previous point, in which the thickness of the panel is at least 7 mm. POINT 36. The assembly according to any of the preceding elements 1 to 35, wherein a portion of the upper edge of the second 12 and / or the fourth edge 14, as a long edge, comprises a vertically extending edge portion 184 extending from the front surface 15 followed by a first elbow, preferably a right-angled elbow, inward toward the center of the panel, the elbow preferably comprising a chamfered edge between the vertically extending edge portion 184 and the first upper lip portion 149, 139, wherein the elbow is followed by a horizontal flat surface, the first upper lip portion 149, 129 preferably comprising said horizontal flat surface, and wherein an upper edge portion of the third edge 13 and / or first edge 11, such a long edge, comprises a vertically extending edge portion 182 extending from the front surface 15 followed by a second elbow,preferably a right-angled elbow, extending outwards in a direction from the center of the panel, where the second elbow is followed by a horizontal flat surface, preferably the first lower lip portion 139, 119 comprising said horizontal flat surface, and where a pocket 111, 112, 113 is provided in the third edge 13 and / or the first edge 11 between the vertically extending edge portion 182 and the flat surface. POINT 37. The assembly according to point 36, wherein pocket 111 extends downwards in a vertical direction towards the rear surface 16, preferably pocket 111 extends below the horizontal flat surface; pocket 111 opens upwards in a direction towards the front surface 15. POINT 38. The assembly according to point 36, wherein the pocket 112 extends laterally in a horizontal direction towards the center of the panel 20 comprising the third edge 13 and / or the first edge 11, preferably the second pocket 112 does not extend below the horizontal flat surface; the pocket 112 opens laterally in a direction away from the third edge 13 and / or the first edge 11. POINT 39. The assembly according to point 36, wherein pocket 113 extends towards the third edge in a direction that has an angle with respect to the vertically extending edge portion 182, as an angle between 15 and 75 degrees, as an angle of 45 degrees; pocket 113 extends below the horizontal flat surface; pocket 113 opens at least partially laterally in a direction away from the third edge 13 and / or first edge 11. POINT 40. The assembly according to any of the preceding elements 1 to 39, wherein a portion of the upper edge of the fourth edge 14 and / or the second edge 12, as a long edge, comprises a vertically extending edge portion 184 extending from the front surface 15 followed by an inward bend, preferably a right-angled bend, toward the center of the panel; the bend being preferably a right-angled chamfered edge between the vertically extending edge portion 184 and the first upper lip portion 149, 129; forming Qrzrnn / zznz / E / YiAi the beveled edge a first pocket 116 between the third edge 13 and the fourth edge 14 and / or the first edge 11 and the second edge 12; the first elbow is followed by a horizontal flat surface, wherein the first part of the upper lip 149, 129 comprises said horizontal flat surface, and wherein an upper edge portion of the third edge 13 and / or first edge 11, said long edge, comprises a vertically extending edge portion 182 extending from the front surface 15 followed by a second elbow, preferably a right-angled elbow, outwards in a direction from the center of the panel; the elbow is followed by a horizontal flat surface, the first lower lip portion 139, 119 comprising said horizontal flat surface; a second pocket 116' is provided in the vertically extending edge portion 182;the second pocket 116' extends laterally in a horizontal direction towards the center of panel 20 comprising the third edge 13 and / or the first edge 11; preferably the second pocket 116' does not extend below the horizontal flat surface, preferably the second pocket 116' opens laterally in a direction away from the third edge 13 and / or the first edge 11, preferably the second pocket 116' opens at least partially for the first pocket 116 and is at least partially in direct fluid communication with the first pocket 116' when the third edge 13 is configured in an assembled position with the fourth edge 14 and / or the first edge 11 is configured in an assembled position with the second edge 12; POINT 41. The assembly according to any of the preceding elements 1 to 40, wherein a portion of the upper edge of the fourth edge 14 and / or the second edge 12, as a long edge, comprises a vertically extending edge portion 184 extending from the front surface 15 followed by an elbow, preferably a right-angled elbow, inwards towards the center of the panel comprising the fourth edge 14 and / or the second edge 12; preferably, the elbow is a right-angled chamfered elbow;the first bend is followed by a horizontal flat surface, wherein the first part of the upper lip 149, 129 comprises said horizontal flat surface, and wherein an upper edge portion of the third edge 13 and / or first edge 11, said long edge, comprises a vertically extending edge portion 182 extending from the front surface 15 followed by a first inwardly contiguous bend in the third edge 13 and / or first edge 11, such as a 10-20 degree bend; the first fold is followed by a second contiguous fold, such as an acute fold, outward in a direction from the center of the panel; the second bend is followed by a contiguous horizontal flat surface, the first part of the lower lip 139, 119 comprising said horizontal flat surface, whereby a pocket 114 is provided in the third edge 13 and / or the first edge 11 between the vertically extending edge portion 182 and the horizontal flat surface;Pocket 114 extends towards the third edge 13 and / or the first edge 11; pocket 114 preferably does not extend below the horizontal flat surface; αρζρηη / ζζηζ / Ε / γίΛΐ pocket 114 opens at least partially laterally in a direction away from the third edge 13 and / or first edge 11. POINT 42. The assembly according to any of the preceding elements 1 to 40, wherein a portion of the upper edge of the fourth edge 14 and / or the second edge 12, as a long edge 5, comprises a vertically extending edge portion 184 extending from the front surface 15 followed by an elbow, preferably a right-angled elbow, inward toward the center of the panel comprising the fourth edge 14 and / or the second edge 12; preferably, the elbow is a right-angled chamfered elbow; the elbow is followed by a horizontal flat surface, wherein the first portion of the upper lip 149,129 comprises said horizontal flat surface, and wherein a portion of the upper edge of the third edge 13 and / or first edge 11, such a long edge, may comprise a vertically extending edge portion 182 extending from the front surface 15 followed by an adjacent sharp elbow outward in a direction from the center of the panel;the elbow is followed by an adjoining flat surface; the first portion of lower lip 139, 119 comprises said horizontal flat surface, wherein the adjoining flat surface 15 forms an angle with a front surface 15, whereby a pocket 115 is provided in the third edge 13 and / or the first edge 11 between the flat surface and the first part of upper lip 149, 129; the pocket 115 opens at least partially laterally in a direction away from the third edge 13 and / or first edge 11. αρζρηη / ζζηζ / Ε / γίΛΐ

Claims

NOVELTY OF THE INVENTION CLAIMS 1. A set of similar or essentially identical building panels, such as floor panels or wall panels, comprising a first mechanical locking system on the respective parallel and opposite third and fourth edges (13, 14), the long edges of the panel, the first mechanical locking system configured to cooperate for horizontal and vertical locking between two adjacent building panels (10, 20), preferably by means of a folding motion, and a second locking system on the respective parallel and opposite first and second edges (11, 12), such as short edges, configured to cooperate for horizontal and vertical locking of two adjacent building panels (10, 30), preferably by means of a vertical motion, such as vertical folding, wherein a portion of the upper edge of one of the third or fourth edges (13, 14), preferably the third edge (13),comprising a first lower lip portion (139) configured to cooperate with a first upper lip portion (149) of a portion of the upper edge of the other of the third and fourth edges of an adjacent panel (20) when said third and fourth edges are assembled in a locking position, wherein an upper edge portion of one of the first or second edges comprises a second lower lip portion (119) configured to cooperate with a second upper lip portion (129) of a portion of the upper edge of the other of the first and second edges of an adjacent panel (30) when said first and second edges are assembled in a locking position, and wherein the first lower lip portion (139) is disposed in a first plane (H1) and the second lower lip portion (119) is disposed in a second plane (H2) being displaced from the first plane (H1).

2. The assembly according to claim 1, further characterized in that the first plane (H1) and the second plane (H2) are essentially flush.

3. The assembly according to claim 1, further characterized in that the first plane (H1) is arranged from 0.2 to 0.5 mm below the second plane (H2), preferably around 0.3 mm, more preferably 0.3 mm.

4. The assembly in accordance with claim 3 above, further characterized in that the thickness of the panel is in the range of 4 to 6 mm.

5. The assembly according to claim 1, further characterized in that the first plane (H1) is arranged from 0 to 2 mm below the second plane (H2), preferably from 0 to 1 mm below, more preferably 0.6 mm below.

6. The assembly according to claim 5 above, further characterized in that the panel thickness is at least 7 mm.

7. The assembly in accordance with any of the preceding claims 1 to 6, further characterized in that each of the lip portions (119, 129, 139, 149) comprises a horizontal flat surface.

8. The assembly in accordance with any of the preceding claims, further characterized in that the first upper lip portion (149) is configured to rest on the first lower lip portion (139) when the adjacent panels are assembled in the locked position by means of the first locking system.

9. The assembly in accordance with any of the preceding claims, further characterized in that the second upper lip portion (129) is configured to rest on the second lower lip portion (119) when the adjacent panels are assembled in the locked position by means of the second locking system.

10. The assembly in accordance with any of the preceding claims, further characterized in that the first system and the locking system each comprise a locking tab (lli, 12i, 14h) and a tab groove (1 lj, 12j, 13j), wherein said lip portions (119, 129, 139, 149) are arranged between said locking tab or tab groove and the front surface (15) of the panel.

11. The assembly in accordance with any of the preceding claims, further characterized in that said upper edge portion of the second edge (12) and / or fourth edge (14), each comprising a vertically extending edge portion extending from the front surface (15) followed by an inwardly contiguous elbow towards a center of the panel, preferably said elbow being followed by a horizontal flat surface of the first upper lip portion (149) and / or a flat surface of the second upper lip portion (129).

12. The assembly in accordance with any of the preceding claims, further characterized in that said upper edge portion of the first edge (11) and / or third edge (13) each comprises a vertically extending edge portion extending from the front surface (15) followed by an adjacent edge portion bending outwards away from the center of the panel, preferably said bend being followed by a horizontal flat surface of the first lower lip portion (139) and / or a flat surface of the second lower lip portion (119).

13. The assembly in accordance with any of the preceding claims 11 or 12, further characterized in that said elbow comprises a right-angle elbow.

14. The assembly in accordance with any of the preceding claims, further characterized in that the panel comprises a surface layer (15a), said surface layer comprising a binder, such as a thermosetting resin.

15. The assembly in accordance with the preceding claim, further characterized in that said binder (18) has a penetration depth in a core (17) of the panel in a direction transverse to the front surface (15).

16. The assembly according to the preceding claim, further characterized in that said penetration depth extends to and includes at least part of the 5 lip portions.

17. The assembly according to any of the preceding claims 1 to 16, further characterized in that at least one pocket (111, 112, 113, 114, 115, 116, 116') is formed adjacent to the first and / or second part of the lower lip (119, 139) between the third edge (13) of a panel and the fourth edge (14) of adjacent panels or between the first edge (11) of a panel and the second edge (12) of an adjacent panel when the panels are configured in the assembled position, said pocket configured to receive a sealant, such as a vax, said pocket preferably configured to distribute said sealant between said third (13) and fourth edge (14) or first edge (11) and second edge (12) in response to said assembly of said panels. αρζρηη / ζζηζ / Ε / γίΛΐ

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