DRY SCREED SYSTEM, METHOD FOR LAIDING AND MANUFACTURING AND USE OF A DRY SCREED SYSTEM

Description

FIELD OF THE INVENTION

[0001] The invention relates to a dry screed system that can be laid on a floor or subfloor according to the preamble of claim 1. The dry screed system accordingly comprises a base layer formed from base panels and at least one cover panel layer formed from cover panels. The base panels contain gypsum or are formed from gypsum. The cover panels contain rigid wood or a rigid wood material or are formed from rigid wood or a rigid wood material. The cover panels can be glued or are glued to the base panels.

[0002] The invention further relates to a use of a dry screed system according to claim 11.

[0003] Furthermore, the invention relates to a method for laying a dry screed system, particularly described herein, according to claim 12.

[0004] The invention further relates to an insulation method according to the preamble of claim 13.

[0005] Finally, the invention relates to a dry screed system manufacturing method according to the preamble of claim 15. TECHNOLOGICAL BACKGROUND

[0006] The slab-by-slab installation of a dry screed using a first and second layer of different materials has proven successful in the construction industry. The layers are sometimes screwed together, and the slabs are sometimes arranged so that the joints overlap. A dry screed system according to the preamble of claim 1 is known, for example, from prior art US 2010 / 223872 A1. This results in several disadvantages concerning the stability of the screed, its structural properties such as adaptation to the subfloor, and its thermal and insulating properties. This is where the invention comes in. PRESENTATION OF THE INVENTION

[0007] Against this background, the object underlying the invention is to improve the qualitative properties of a floor or dry screed without additional manual effort and without additional costs for materials and logistics. This object is achieved by a dry screed system which can be laid on a floor or subfloor according to claim 1. Further embodiments of the invention arise from the dependent and auxiliary claims. The dry screed system according to the invention is accordingly characterized in that a positioning aid is arranged on the base plates and / or the cover plates, which positioning aid is visible during or after laying the base plates and / or cover plates, and which specifies the position of the cover plates which can be arranged or are arranged on the base plates in such a way that at least one offset is formed between the base plate and cover plate, wherein the offset dimension is greater than approx.20 cm, in particular the offset is in the range from approximately 20 cm to approximately 40 cm, preferably it is approximately 30 cm. For example, an offset can be provided in one direction, or a first offset in a first direction and a second offset in a second direction running approximately perpendicular to the first direction. By offsetting the panels arranged on top of one another, namely by the aforementioned offset of, for example, approximately 30 cm, a stable and secure arrangement of the cover panel layer on the base panel layer is achieved. The cover panel is preferably made of a rigid wood fiber material, for example a medium-density fiberboard (MDF). MDF offers the advantage that the material is available with high dimensional stability and is comparatively thin.Despite the thin thickness of the covering layer and the flexural rigidity of the covering layer, the result when laying the dry screed system is a stable and even covering layer (i.e. no or almost no unevenness in the laid dry screed). The comparatively thin thickness of the covering layer makes the panels easier to handle during installation and allows for better alignment or adjustment on the base layer. The panels will not break due to their flexural rigidity. For example, an MDF covering board according to the invention has a thickness (e.g., approx. 2 to approx. 6 mm) with a (manufacturing) tolerance of approx. 0.1 mm over a length (or width) of approx. 1 m. This ensures that the surface of the dry screed system is even and that no noticeable joints form during installation.This eliminates the need for the dry screed to be primed and / or leveled after installation before the floor covering is applied. The slab joints are no longer visible through the covering, and for the tradesperson (floor layer), the elimination of the priming / leveling process represents a significant simplification and improvement during installation: The work required is noticeably reduced, and any costs for priming / leveling materials are eliminated.

[0008] The cover plate can have a thickness of approximately 2 mm to approximately 6 mm, preferably approximately 4 mm. Because the cover plate is comparatively thin, it has a low dead weight, which reduces the dead pressure during installation and bonding. Reduced dead pressure of the cover plate on the base plate ensures that the contact adhesive does not prematurely set due to the weight of the cover plate before the plates are aligned / adjusted relative to one another and does not harden or cure too early. The base plate can be made of plasterboard with a thickness of approximately 6 mm to approximately 20 mm, preferably with a thickness of approximately 10 mm. This ensures that the dry screed is comparatively thin overall without any loss of stability.

[0009] According to a preferred arrangement, the base plates and / or the cover plates can be rectangular, preferably such that the length of the long side of the plates is twice the length of the narrow sides of the plates, in particular such that the long sides have a length of approximately 120 cm and the narrow sides a width of approximately 60 cm. If the offset dimension is approximately 30 cm as described above, the offset would correspond to half the width of the narrow sides of the plates. This results in some simplifications when laying the layers: For example, the base plate can be cut to a width of approximately 30 cm using the positioning aid, which specifies a 30 cm distance from the plate edge. In this respect, the positioning aid also functions as a cutting aid. The plates can therefore have a positioning and cutting aid. These plates with half the width are laid on the floor / subfloor at the edges.Uncut panels with a specified width of 60 cm are placed next to them. Uncut cover panels are placed on top of them at the edges, resulting in the offset of approximately 30 cm according to the invention without the need for any measurements or adjustments. The craftsman can achieve this without additional manual effort by using the positioning aid or the positioning / cutting aid of the base panels when laying and cutting the panels.

[0010] The positioning aid can preferably comprise a plurality of positioning marks or positioning and cutting marks visibly arranged on the base plate / cover plate. The positioning marks can be arranged such that they are spaced approximately 30 cm from the edge of the narrow side of the plate and / or approximately 30 cm from the edge of the long side of the plate. For a plate size of 120 x 60 cm 2<, two positioning marks of the positioning aid would therefore be arranged on the plate, namely both on an imaginary center line between the edges of the long sides and both each at a distance of 30 cm from the nearest edge of the narrow side. The distance between the positioning marks is 60 cm. The offset dimension preferably corresponds to half the plate width (e.g. 60 cm, i.e. offset dimension in the transverse direction approximately 30 cm). The offset dimension preferably corresponds to one third of the plate length (e.g. 120 cm, i.e.Offset in longitudinal direction approx. 30 cm).

[0011] The positioning marks can be printed, pressed, embossed, punched, or glued onto one or both sides of the base panels / cover panels. The positioning marks are preferably T-shaped. The horizontal line or structure of the T-shaped marks runs, for example, parallel to the long side of the base panels / cover panels, while the vertical line / structure of the T-shaped marks runs, for example, parallel to the narrow side of the base panels / cover panels. The orientation of a T-shaped positioning mark can differ from the orientation of the adjacent positioning mark. This makes cutting to size and offsetting the panels in the corner of the room easier, because the orientation of the T-shaped positioning marks also determines the direction of the offset cover panel.

[0012] In order to achieve a connection between the base layer and the cover plate layer that is both stable and yet sufficiently elastic, it is provided that an adhesive layer is arranged on the base plate and on the cover plate, wherein the adhesive of the adhesive layers comprises or is formed from a contact adhesive. The contact adhesive is arranged on both parts to be joined, i.e. on the underside of the cover plate and on the top side of the base plate. Unlike with wet adhesives or two-component adhesives, the parts to be joined, namely the base plate and the offset cover plate, can be moved relative to one another after the surfaces coated with contact adhesive have come into contact.This allows for precise adjustment and alignment of the panels relative to each other and relative to the positioning aids when laying the dry screed, especially after the panels have been arranged with the contact adhesive surfaces lying on top of each other. This significantly simplifies and improves the installation of the dry screed. By applying pressure, for example by locally tapping the adjusted and aligned cover panel with a rubber hammer, the adhesive bond becomes solid where the pressure is applied to the contact adhesive layers. By applying pressure across the entire surface of the cover panel, the contact adhesive between the cover panel and the base panel solidifies across the entire surface, so that the cover panel is then permanently and immovably positioned on the base panel (correspondingly offset).The result is a comparatively thin, easy-to-lay dry screed with a level, hard surface without any unevenness or annoyingly wide joints, and with permanently high stability due to the offset. The use of the contact adhesive avoids stresses in the screed, as does structural failure of the panels and / or the panel connections, as the covering layer is made of a rigid material. Tests have shown that the combination of a rigid, comparatively thin covering layer arranged on the plaster base layer, both bonded with a contact adhesive that allows alignment and adjustment, and the stabilizing offset of at least 20 cm (in two directions), creates a dry screed that is overall thinner than comparable systems, yet more stable and level, i.e. with fewer unevenness or defects in the surface.

[0013] To simplify installation and / or prevent contamination of the adhesive layer(s), a removable protective film can be applied to at least one adhesive layer. During installation, the protective film must then be removed, exposing the adhesive layer and allowing it to come into contact with the other layer. Before joining, the protective film protects the adhesive layer from contamination, such as crumbs or other dirt, and also from wear and tear and unwanted evaporation of the adhesive.

[0014] In a further embodiment, it can be provided that the base plates and / or the cover plates are formed in multiple layers, in particular in two layers. For example, by providing the base plate with a second layer, it can become more stable, have better sound insulation or better thermal insulation. The additional layer can, for example, comprise or be formed from a thermoplastic material, for example polyethylene (PE) or a foam thereof (PE foam) and / or extruded polystyrene (PS) and / or extruded polystyrene (XPS). The additional layer can alternatively or cumulatively contain a wood fiber material and / or a wood fiber insulation material. The additional layer can alternatively or cumulatively contain coconut fibers, cork and / or straw.

[0015] An improvement in the qualitative properties of a floor or dry screed without additional craftsmanship and without additional costs for materials and logistics is further achieved by using a dry screed system described herein according to claim 11. Accordingly, it is intended that the dry screed system described herein be used as an impact sound insulation system. The impact sound insulation can be arranged, for example, between a subfloor and a parquet floor.

[0016] An improvement in the qualitative properties of a floor or dry screed without additional manual effort and without additional costs for materials and logistics is also achieved by a method for laying a dry screed system according to claim 12, in particular as described herein. Accordingly, in a first method step, base plates of the dry screed system are laid on a floor or subfloor. In a second method step, cover plates of the dry screed system are arranged on the base plates. The cover plates are arranged offset on the base plates by means of a positioning aid arranged on the base plates and / or the cover plates, such that the offset has an offset dimension of at least approximately 20 cm, in particular approximately 20 cm to approximately 40 cm, preferably approximately 30 cm.

[0017] The positioning aid can be formed from several positioning marks arranged on the base plates, with the cover plates being placed against the positioning marks of the base plates during installation. The positioning marks indicate the positions of the joints in the cover plate layer of the dry screed, which do not correspond to the positions of the joints in the base layer. In this respect, the plates are offset, and the joints between adjacent base plates are also offset from the joints of the adjacent cover plates. The high dimensional accuracy of the cover plates and the possibility of precise positioning of the plates due to the properties of the contact adhesive, the positioning aid, and the comparatively low weight of the cover plates ensure that the joints in the cover layer are very narrow, so that the cover layer of the dry screed is overall level and has no or almost no unevenness.

[0018] The cover panels are bonded to the base panels of the dry screed system by bonding a contact adhesive layer of the cover panels of the dry screed system to a contact adhesive layer of the base panels of the dry screed system. The contact adhesive layers are already applied to the panels, so no adhesive material needs to be prepared and applied during installation. The contact adhesive layers are particularly easy to handle if at least one protective film applied to at least one of the adhesive layers of the dry screed system panels is removed before installing the cover panels.

[0019] An improvement in the qualitative properties of a floor or dry screed without additional manual effort and without additional costs for materials and logistics is further achieved by an insulation method according to claim 13. The method serves to insulate impact sound generated on a floor or subfloor. The insulation method uses the method described herein for laying a dry screed system, in particular the one described herein.

[0020] An improvement in the qualitative properties of a floor or dry screed without additional manual effort and without additional costs for materials and logistics is finally achieved by a manufacturing and packaging method according to claim 15. The method serves to manufacture and package a dry screed system, in particular as described herein, wherein the dry screed system is formed from several dry screed system construction materials. Each system construction material comprises a cover plate and a base plate. A contact adhesive layer is applied to the base plate. A contact adhesive layer is also applied to the cover plate. A protective film is applied to the contact adhesive layer of the base plate. The base plate and cover plate are packaged one on top of the other and thus form a usable system construction material.The user / craftsman procures a sufficient number of system building materials for a room or a room, removes the packaging and can lay the panels staggered, if necessary after the panels have been cut to size accordingly.

[0021] The aforementioned components to be used according to the invention as well as those claimed and described in the exemplary embodiments are not subject to any special exceptional conditions in terms of their size, shape, material selection and technical conception, so that the selection criteria known in the field of application can be applied without restriction.

[0022] Further details, features, and advantages of the subject matter of the invention emerge from the dependent claims, as well as from the following description and the accompanying drawing, which schematically illustrates an exemplary embodiment of a dry screed system. Individual features of the claims or embodiments can also be combined with other features of other claims and embodiments. BRIEF DESCRIPTION OF THE CHARACTERS

[0023] In the drawing show Fig. 1a system construction element of a dry screed system in a schematic exploded view, Fig. 2A / 2B a base plate of a dry screed system according to Fig. 1 in different perspective views, Fig. 3 a room corner with an arrangement of base plates of the dry screed system according to Fig. 1 and Fig. 4the corner of the room according to Fig.3 with an arrangement of base and cover plates of the dry screed system according to Fig. 1 . DETAILED DESCRIPTION OF EMBODIMENTS

[0024] The Figures 1 to 4 The schematically illustrated dry screed system 1 is used to lay a dry screed 4 on a floor / subfloor 2, such as a room 3. Several system construction materials 5 are used, the number of system construction materials 5 depends on the size of the floor area 6 of the room 3. A system construction material 5 is in Fig. 1shown schematically and it comprises, for example, a base plate 7 and a cover plate 8. It can be provided that the system building material 5 is packaged in such a way that four plates 7, 8 are contained per package, for example two base plates 7 and two cover plates 8. It is sufficient if a protective film 10 of the adhesive layer 9 is provided only on the base plates 7. The system building materials 5 to be laid can optionally be provided on a (Euro) pallet, i.e. with a two- or three-digit number of plates 7, 8. If such a large number of plates 7, 8 are stacked on top of one another for the purpose of packaging, shipping or storage, it is recommended that each of the plates 7, 8 is provided with a protective film 10, since the pressure acting on the plates 7, 8 can otherwise lead to undesired sticking of the plates 7, 8 within the packaging.

[0025] An adhesive layer 9 is arranged on each of the base plate 7 and the cover plate 8. For smaller system construction material packaging sizes, only the adhesive layer 9 of the base plate 7 is provided with a protective film 10, which can be removed by the craftsman laying the dry screed 4. The base plate 7 is made of gypsum and is approximately 10 mm thick. The cover plate 8 is made of MDF and is approximately 4 mm thick. The base plate 7 and cover plate 8 have an area of ​​60 x 120 cm². The adhesive layers 9 each comprise a contact adhesive.If the base and cover plates 7, 8 are equipped with a protective film 10, such as in the case of large system building material packaging (Euro pallet), the craftsman will first remove the base plate 7 and lay it on the floor / subsurface 2, then remove the protective film 10 from the base plate 7, then remove the cover plate 8 from the packaging and peel off the protective film 10 from the cover plate 8 and finally arrange the cover plate 8 offset on the base plate 7 with the aid of one or more positioning marks 13 of the positioning means 12 and glue them together by contacting the adhesive layers 9 of the plates 7, 8.

[0026] The Figures 2A and 2Bshow different views of one of the base plates 7 of the dry screed system 1. A positioning aid 12 or positioning and cutting aid 12 is arranged on the surface 11 of the base plates 7. The positioning aid 12 comprises two fitting or positioning marks 13. The positioning marks 13 are printed on the surface 11 of the base plate 7. Each positioning mark 13 is T-shaped, with the horizontal line 14 of the T-shape oriented parallel to the edge 15 of the long side 16 of the plate 7, and the vertical line 17 of the T-shape parallel to the edge 18 of the narrow side 19 of the plate 7. Each positioning mark 13 specifies a positioning point 20, namely at the intersection or intersection point of the vertical and horizontal lines 14, 17 of the respective T-shape. The orientation of the first positioning mark 13 is mirrored or rotated by 180° compared to the orientation of the second positioning mark 13.The first positioning mark 13 therefore specifies a first positioning direction in addition to the positioning point 20 and the second positioning mark 13 specifies a second positioning direction opposite to the first positioning direction.

[0027] The positioning marks 13 not only help the craftsman when laying the dry screed 4 to achieve the offset 21 between the base plate 7 and the cover plate 8 of approximately 30 cm, but they also serve as a cutting aid. The (center) line 22, which geometrically intersects the first and second positioning marks 13, helps when cutting the slab width, i.e., parallel to the slab's longitudinal direction ( Fig. 2A ). The (third) line 23, which runs parallel to the narrow side 19 of the plates 7, 8 and geometrically intersects the first or second positioning mark 13, helps when cutting the plate length, ie parallel to the plate transverse direction, which is oriented perpendicular to the plate longitudinal direction ( Fig. 2B ).

[0028] An arrangement of base plates 7 laid on a floor 2 in a corner 24 of a room can Fig. 3 The base plates 7 form the base layer 25. The edge plates 7 have been cut to size and laid using the positioning marks 13, and uncut base plates 7 have been laid adjacent to them (in Fig. 3 only an uncut base plate 7 is shown, in Fig. 4 several of these plates 7 are shown). An adhesive layer 9 is arranged on the base plates 7, which is protected by a protective film 10. The protective film 10 can be removed by the craftsman, which in Fig. 3is schematically represented by the arrow symbols. After removing the protective film 10, the cover plates 8 can be arranged on the base plates 7. The cover plates 8, which form the cover plate layer 26, are laid in such a way that a corner of the cover plate 8 is positioned on a positioning mark 13, in particular on the positioning point 20. This always results in an offset 21 of approximately 30 cm relative to the long edge 16 and relative to the narrow edge 18 of the base plates 7. As in Fig. 4As shown, some of the edge-side cover panels 8 also need to be cut to size. If the cover panels 8 also have positioning marks 13, these can also be helpful when cutting the cover panels 8. The cover panels 8 are glued to the base panels 7; for this purpose, the base panel 7 and cover panel 8 each have a contact adhesive layer 9. The bonding of the base and cover panels 7, 8 with the adhesive (9) and offset 21 creates a stable yet sufficiently flexible dry screed 4.

[0029] The one in the Figures 1 to 4 The schematically illustrated dry screed 4 can also be used as impact sound insulation. Particularly good impact sound insulation is achieved when, for example, the base plate 7 is formed in multiple layers and includes an additional layer of PE foam (not shown in the Figures 1 to 4 ). LIST OF REFERENCE SYMBOLS

[0030] 1 Dry screed system 2 Floor / subfloor 3 Room 4 Dry screed 5 System construction materials 6 Floor surface 7 Base plate 8 Cover plate 9 Adhesive layer 10 Protective film 11 Surface 12 Positioning aid 13 Positioning mark 14 Horizontal line 15 (Long) edge 16 Long side 17 Vertical line 18 (Narrow) edge 19 Narrow side 20 Positioning point 21 Offset 22 Center line 23 Third line 24 Room corner 25 Base layer 26 Cover plate layer

Claims

1. Dry screed system (1), which can be laid on a floor (2) or substrate (2), comprising a base layer (25) formed from base panels (7), and at least one top panel layer (26) formed from top panels (8), wherein the base panels (7) contain gypsum, or are formed from gypsum, wherein the top panels (8) contain wood, or a flexurally rigid wood-based material, or are formed from a flexurally rigid wood, or from a flexurally rigid wood-based material, and wherein the top panels (8) can be adhesively bonded to the base panels (7), wherein a positioning aid (12) is arranged on the base panels (7), and / or the top panels (8), which is visible as the base panels (7) are being laid out, or after they have been laid out, and which specifies the position of the top panels (8) that can be arranged on the base panels (7), such that at least one offset (21) is formed between the base panel (7) and the top panel (8) after they have been laid out, characterised in that, the offset dimension is greater than approx. 20 cm, and in that, in each case an adhesive layer (9) is arranged on the base panel (7) and on the top panel (8), wherein the adhesive of the two adhesive layers (9) in each case comprises, or is formed from, a contact adhesive.

2. Dry screed system (1) in accordance with Claim 1, characterised in that, the offset (21) has an offset dimension in the range between approx. 20 cm and approx. 40 cm, preferably approx. 30 cm.

3. Dry screed system (1) in accordance with Claim 1 or 2, characterised in that, the base panels (7), and / or the top panels (8), are rectangular in form, preferably such that the length of the long side (16) of the panels (7, 8) is twice the length of the short sides (19) of the panels (7, 8), in particular such that the long sides (16) have a length of approx. 120 cm, and the short sides (19) have a length of approx. 60 cm.

4. Dry screed system (1) in accordance with one of the Claims 1 to 3 characterised in that, the top panel (8) is formed from a flexurally rigid wood fibre material, in particular from a medium-strength wood fibre material (MDF), and preferably has a thickness of between approx. 2 mm and approx. 6 mm, preferably approx. 4 mm, and / or has a thickness with a tolerance of approx. 0.1 mm per approx. 1 m length or width.

5. Dry screed system (1) in accordance with one of the Claims 1 to 4, characterised in that, the positioning aid (12) comprises a plurality of positioning marks (13) visibly arranged on the base panel (7), and / or the top panel (8).

6. Dry screed system (1) in accordance with Claim 5, characterised in that, the positioning marks (13) are arranged at a distance of approx. 30 cm from the edge (18) of the short side (19) of the panel, and / or at a distance of approx. 30 cm from the edge (15) of the long side (16) of the panel.

7. Dry screed system (1) in accordance with Claim 5 or 6, characterised in that, the positioning marks (13) are printed, or pressed, or embossed, or stamped, or adhesively bonded, onto one or both sides of the base panels (7), and / or top panels (8) .

8. Dry screed system (1) in accordance with one of the Claims 4 to 6, characterised in that, the positioning marks (13) are formed in a T-shape.

9. Dry screed system (1) in accordance with one of the Claims 1 to 8, characterised in that, a detachable protective film (10) is arranged on at least one adhesive layer (9).

10. Dry screed system (1) in accordance with one of the Claims 1 to 9, characterised in that, the base panels (7) and / or the top panels (8) are formed in multiple layers, in particular in two layers, wherein at least one additional layer preferably comprises, or is formed from, a thermoplastic material, in particular polyethylene (PE), and / or polysterol (PS), and / or extruded polysterol (XPS), and / or wherein at least one additional layer comprises, or is formed from, a wood fibre material, a wood fibre insulating material, cork, and / or straw.

11. Use of a dry screed system (1) in accordance with one of the Claims 1 to 10 as an impact sound insulation system.

12. Method for the laying of a dry screed system, in particular a dry screed system (1) in accordance with one of the Claims 1 to 10, wherein in a first step of the method, base panels (7) of the dry screed system (1) are laid on a floor (2) or substrate (2), wherein in a second step of the method, top panels (8) of the dry screed system (1) are arranged on the base panels (7), wherein a positioning aid (12) is arranged on the base panels (7), and / or the top panels (8), wherein the positioning aid (12) is formed from a plurality of positioning marks (13) arranged on the base panels (7), and / or top panels (8), characterised in that, the top panels (8) are arranged in an offset manner on the base panels (7) by means of the positioning aid (12) arranged on the base panels (7), and / or the top panels (8), such that the offset (21) is at least approx. 20 cm, in particular between approx. 20 cm and approx. 40 cm, preferably is approx. 30 cm, and wherein in the course of laying, the top panels (8) are placed against the positioning marks (13) of the base panels (7), and wherein the top panels (8) are adhesively bonded to the base panels (7) of the dry screed system (1) with a contact adhesive, in that a contact adhesive layer (9) of the top panels (8) of the dry screed system (1) makes contact with a contact adhesive layer (9) of the base panels (7) of the dry screed system (1).

13. Method in accordance with Claim 12, wherein at least one protective film (10), arranged on at least one of the adhesive layers (9) of the panels (7, 8) of the dry screed system (1), is removed before the top panels (8) are laid.

14. Method for the insulation of impact sound generated on a floor or substrate, characterised by, use of a method in accordance with one of the Claims 12 or 13.

15. Method for the production and packaging of a dry screed system, in particular a dry screed system (1) in accordance with one of the Claims 1 to 10, wherein the dry screed system (1) is formed from a plurality of means of dry screed system construction (5), wherein a means of system construction (5) comprises a top panel (8) and a base panel (7), characterised in that, a contact adhesive layer (9) is arranged on the base panel (7), in that, a protective film (10) is arranged on the adhesive layer of the base panel (7), in that, a contact adhesive layer (9) is also applied to the top panel (8), and in that, base panel (7) and top panel (8) are arranged packed on top of each other, and form the usable means of system construction (5).