Waterproof member for roof window and roof window installed in inclined roof structure

Abstract

Disclosed are a waterproof member for a roof window and a roof window mounted in a sloping roof structure. The waterproof member is made of a sheet material and comprises an elongate main element (301) and at least one end element (302) attached at one end to the main element (301) by a folding seam connection (303). The main element (301) comprises a first section (3011) extending along a length axis (L) and a height axis (H) of the waterproof member, a second section (3012) extending along the length axis and a width axis (W), and a planar third section (3013) extending between the first section (3011) and the second section (3012).

Description

Technical Field

[0001] The utility model relates to a waterproof component for a roof window, the roof window comprises a frame, the frame comprises a top frame component, a bottom frame component and two side frame components, the frame components define a frame opening, and each frame component has an outer side facing away from the frame opening, wherein the waterproof component is made of a sheet material, wherein the waterproof component comprises an elongated main element with two ends and at least one end element, wherein the main element comprises a first section extending along a length axis and a height axis of the waterproof component, and a second section extending along a length axis and a width axis of the waterproof component, wherein the length axis extends between the two ends of the main element, and wherein at least one end element is attached to the main element at one end by a folding seam connector and connected to the first section and the second section. The utility model also relates to a method for manufacturing the waterproof component. Background Art

[0002] The flashing component forms part of a flashing assembly for weatherproofing a joint between a roof window and a sloping roof structure to which the roof window is mounted. The flashing component is configured to be arranged with a length axis extending parallel to the length axis of a frame member of the roof window, a first section being configured to extend along an outer side of the frame member, and a second section being configured to extend away from the outer side of the frame member and the frame opening. In the installed state, the first section is thus directly or indirectly engaged with the outer side of the frame member, and the second section extends substantially in a plane with the roof structure. For example, an indirect engagement may occur in the case of an insulating frame being arranged around the frame of the roof window. If the flashing component is used as a bottom flashing component and the roof window is mounted deep in the roof structure, the second section may have a slight upward inclination, for example by extending at an angle of less than 90 degrees relative to the first section, so that the second section may lift water to the level of the outer side of the roof material used below the roof window as viewed in the inclination direction of the roof structure. The first section and the second section are usually made of a single metal sheet and are separated by a bend, so that the outer side of the main element facing outwards in the installed state is concave. The bend may be sharp or have a large radius, giving the main element a curved appearance. Such flashing components have been used for many years and provide excellent water tightness and durability, but since such flashing components are usually made of metal or a metal alloy with a high percentage of pure metal, such as aluminum or copper, such flashing components have a relatively high carbon footprint. Utility Model Content

[0003] In this context, an object of the present invention is to provide a waterproof member made of a material having a lower carbon footprint than currently used materials while maintaining watertightness and durability.

[0004] In a first aspect of the invention, this and other objects are achieved by a waterproof component of the type mentioned in the introduction, which is also characterized in that the main element also includes a planar third section extending between the first section and the second section, and the third section extends along the length axis and is at a certain angle to both the first section and the second section.

[0005] In the case of introducing a third section of the plane, when the main element is made of a piece of sheet material, there will be two bends: a first bend between the first section and the third section, and a second bend between the second section and the third section, both of which extend parallel to the length axis of the waterproof component.

[0006] The bend between the first section and the second section necessitates a corresponding bend in the folded seam of the folded seam connector and causes stretching of the material on one side where there is an angle greater than 180 degrees between the first section and the second section, and compression of the material on the other side where there is an angle less than 180 degrees between the first section and the second section. In prior art flashing members with sharp bends, i.e. bends with a small radius of typically 1 mm to 5 mm, these deformations are concentrated at the bends. Soft metals such as lead and pure aluminum alloys are able to deform sufficiently to compensate for these deformations, but when recycled aluminum and other less ductile materials are used, stretching may result in cracks or holes in the sheet material, which is typically 0.3 mm to 1.0 mm thick, most commonly 0.5 mm to 0.7 mm thick. Cracks typically occur in the material of the folded seam, and holes typically occur in the sheet material adjacent to the folded seam, because the stretching makes the sheet material too thin to remain intact. In the case of the third section, the deformation is distributed over two bends at a distance from each other. This not only means that the required deformation at each bend is reduced, but also means that the material can be stretched from a larger area of ​​the corresponding sheet material, thereby reducing the risk of breaking the sheet material.

[0007] Compared to prior art flashing members with a larger radius forming a continuous bend, the provision of the third section and two bends provides locking of the end element relative to the main element. This prevents the end element and the main element from sliding relative to each other in a direction perpendicular to the length axis and provides better control over the stretching of the material during the formation of the folded seam joint, as the material will be stretched primarily from the areas adjacent to the bends on either side of the folded seam joint.

[0008] In flashings for use with roof windows installed deep in the roof and / or with low frames, the advantages provided by the two bends are particularly evident, so that the height of the main element along the height axis needs to be small, since then only a small amount of material is used for stretching. In some embodiments, the total height of the main element along the height axis is 25 mm to 60 mm, preferably less than 50 mm, more preferably less than 40 mm.

[0009] In one embodiment, the third section extends at an angle of 120 to 140 degrees relative to the first section and the second section, the angle being measured at the outer side of the waterproofing element, i.e. the side facing outwards in the installed state. If the height axis and the width axis defined by the first section and the second section, respectively, are substantially perpendicular, it is currently considered advantageous to have the two bends of approximately the same size, thereby facilitating a uniform distribution of the tension. However, it may also be advantageous to have two bends with, for example, different angles to achieve a shape of the main element, which provides good drainage properties and / or prevents accumulation of dirt, hail or snow.

[0010] As described above, if the flashing member is a bottom flashing member for use at a bottom frame member of a roof window installed in a sloping roof structure, the second section may be configured to extend at an angle to a plane defined by the roof structure so that the second section can direct water below the roof window onto the roof material. The width axis may then not be perpendicular to the height axis, and the angle between the first section and the second section will then be less than 90 degrees measured at the exterior side. In this case, the angle between the third section and the first section and the angle between the third section and the second section will be correspondingly smaller.

[0011] It is presently considered advantageous that the third section extends at an angle of at least 110 degrees, preferably at least 120 degrees, measured at the outer side, relative to both the first section and the second section.

[0012] The folded seam connection for attaching at least one end element to the main element may be a flat-lock seam, wherein each of the end element and the main element comprises a bent edge, wherein the bent edges hook onto each other, and wherein the seam has been compressed so that the bent edges are firmly pressed against each other. The bent edges hooking onto each other provide excess material that can be stretched when the bend is formed between the third section and the first section and between the third section and the second section. Furthermore, the hooked engagement of the bent edges allows the material of the end element and the main element to move slightly relative to each other during the initial stages of the deformation process for forming the bend, thereby facilitating material redistribution, but ultimately securing the two elements to each other.

[0013] In one embodiment, the flashing member further comprises a fourth section extending from an edge of the first section opposite to the third section, wherein the fourth section is configured to engage with an outer side of the frame member in the installed state. When the roof window is installed in the roof of a building, the outer side of the frame member faces outwards, and the fourth section thus allows the flashing member to rest on the frame member, thereby defining the position of the flashing member relative to the roof structure in the height axis and in a direction perpendicular to the plane of the roof structure.

[0014] The flashing member may also include a fifth section extending from an edge of the fourth section opposite the first section, such that the first section, the fourth section and the fifth section form a right angle U-shape. This will allow the flashing member to hook onto the outer section of the frame member, thereby hindering the flashing member from moving in a direction parallel to the plane of the roof structure once installed.

[0015] In one embodiment, the flashing member further comprises a reinforcing element which is mounted or configured to be mounted on the inner side of the flashing member at the first section, i.e., the inner side of the frame facing the roof window. The reinforcing element may have a right angle U-shaped shape corresponding to the right angle U-shaped shape formed by the first section, the fourth section and the fifth section, and the reinforcing element may be configured to be accommodated inside the U-shaped shape formed by the first section, the fourth section and the fifth section on the inner side of the flashing member. The reinforcing element may be hooked onto the outer section of the frame member when having a U-shaped shape, as described above with reference to the flashing member itself. The reinforcing element is preferably made of an elastic material, such as steel, aluminum or a polymer. The reinforcing element is preferably shorter than the main element of the flashing member along the length axis. Two or more reinforcing elements may be arranged at a distance from each other along the length axis. The reinforcing element may be attached to the main element of the flashing member, or be provided separately and engaged with the flashing member during installation of the flashing member.

[0016] In one embodiment, the flashing member further comprises a sixth section extending from an edge of the second section opposite to the third section. If the flashing member is intended to be used as a top flashing member or a side flashing member, the sixth section may be configured to extend below the roofing material. If the flashing member is intended to be used as a bottom flashing member, a skirt element may be attached to the sixth section, or the sixth section itself may be configured to be used as a skirt element extending over the roofing material.

[0017] The skirt element can also be attached to the main element of the bottom flashing member in other ways, so that the skirt element extends continuously with the second section. This can be achieved, for example, by welding or by means of an adhesive.

[0018] The sheet material may be sheet metal, preferably an aluminum alloy, which preferably comprises at least 50%, preferably at least 90%, recycled aluminum. Aluminum alloys have proven to be very suitable for use in waterproofing components because they are resilient, highly weather-resistant and easily recyclable. Soft tempered aluminum in the 3000 series is currently considered to be very suitable. Other metals, such as steel or copper and their alloys, polymers and composite materials such as polymers reinforced with fibers or meshes may also be used.

[0019] The main element and the end element may be made of different materials. Typically, the end element will be made of a material that is easier to bend than the main element. When using an aluminium alloy, it is currently considered advantageous that the main element is made of an alloy having an elongation at break of at least 15% and the end element is made of an alloy having an elongation at break of at least 30%. The elongation at break is measured according to EN ISO6892-1:2019.

[0020] The flashing member may be, for example, a bottom flashing member which is configured to be mounted at the bottom frame member of a roof window installed in a sloping roof, i.e. below the roof window when viewed in the sloping direction of the roof structure. The bottom flashing member is subject to high water loads and high wind loads, and therefore the watertightness of the bottom flashing member is crucial. Furthermore, the bottom flashing member will receive water draining from the pane of the roof window and therefore usually has to protrude into the roof structure. This requires more material during manufacture and usually requires material with a higher degree of deformation than when manufacturing, for example, side flashing members. Therefore, reducing the risk of cracking and overstretching is particularly advantageous for the bottom flashing member.

[0021] In a second aspect of the present invention, the above and other objects are achieved by a method for manufacturing a flashing member for a roof window, the roof window comprising a frame, the frame comprising a top frame member, a bottom frame member and two side frame members, the frame members defining a frame opening, and each frame member having an outer side facing away from the frame opening, the method comprising the following steps:

[0022] A) providing a first sheet material and a second sheet material,

[0023] B) forming an elongated main element having two ends from a first piece of sheet material, such that the main element comprises a first section extending along a length axis and a height axis of the flashing member, and a second section extending along a length axis and a width axis of the flashing member, the length axis extending between the two ends of the main element,

[0024] C) forming the end element from a second piece of sheet material,

[0025] D) attaching at least one end element to the main element at one end of the main element by a folded seam connection, thereby connecting the end element to the first section and the second section,

[0026] Wherein step B) comprises forming a planar third section extending between the first section and the second section by bending the first sheet material twice along two parallel lines, so that the third section extends along the length axis and forms a certain angle with the first section and the second section.

[0027] As described above in relation to the first aspect of the invention, two bends are provided, one on each side of the third section, which means that the tension generated by the deformation at the folded seam connector can be controlled and maintained within a level that allows the waterproof component to be made of recycled aluminum alloys and other materials with poor ductility.

[0028] When step D) is performed after step B), the folding seam joint will also acquire two bends, and the material of the folding seam joint at the bends will deform, while the material at the center of the first, second and third sections will mainly press against the material of the other sheet material. On the concave outer side of the flashing, the material will be compressed, while the material on the convex inner side of the flashing will stretch. Experiments have shown that with two independent bends, compression can be absorbed by the adjacent part of the folding seam joint, and stretching can be compensated by stretching the material of the adjacent part of the folding seam joint.

[0029] In one embodiment, step D) comprises the following steps: D1) folding the edge flange of the second sheet material into a hook-like shape and engaging the edge flange of the second sheet material with the edge flange of the first sheet material, and D2) folding the edge flange onto the first sheet material, thereby forming a folded seam connection. Folding the edge flange onto the first sheet material, i.e. onto the main element, means that deformation of the material at the bend can occur simultaneously with the formation of the folded seam connection. This in turn means that at least some deformation occurs while there is still only loose contact between the first and second sheet materials. This can help to stretch the material from adjacent parts and / or push the material away from the bend.

[0030] The end element typically comprises a section extending in a direction perpendicular to the length axis and configured to extend along the side frame member of the roof window in the installed state, and the folding seam connection will typically be located close to this section. In such a case, folding the edge flange onto the main element will involve forming two bends close to each other on the second piece of sheet material, whereas only one bend is required on the main element. In order to allow for this additional deformation of the end element, the second piece of sheet material can be made of a material with a higher ductility than the first piece of sheet material. This applies in particular to the case where the flashing element is a bottom flashing element, wherein the main element should be able to carry the loads of water, snow and ice accumulated below the roof window and to resist wind loads.

[0031] In some embodiments, step D) includes a step D3) of compressing the folded seam connector into a flat-lock seam by pressing in a direction perpendicular to the length axis. Compression brings the two sheets of material into close contact, thereby contributing to the strength and stability of the waterproof component. Alternatively, compression can be achieved as part of the process of folding the edge flanges of the two sheets of material onto the first sheet of material, corresponding to the above-mentioned step D2), i.e. applying pressure mainly parallel to the length axis. However, applying pressure parallel to the length axis involves the risk of the edge flanges being disengaged from each other, because the portion of the second sheet of material adjacent to the edge flange will be in contact with the pressing tool and may be stretched longer, while the edge flange is pulled, only affected by the frictional contact with the first sheet of material, and largely retains its original shape. On the other hand, by applying pressure in a direction perpendicular to the length axis, pressure is applied substantially equally to the edge flange and to the adjacent portions of the multiple sheets of material. Therefore, after the folding is completed, pressing in a direction perpendicular to the length axis increases the possibility of achieving a waterproof and durable connector.

[0032] In order to provide additional functions to the waterproof component, the method may further include one or more of the following steps:

[0033] E) forming a fourth section extending from an edge of the first section opposite the third section by bending the first piece of sheet material,

[0034] F) forming a fifth segment extending from an edge of the fourth segment opposite the first segment by bending the first piece of sheet material such that the first segment, the fourth segment and the fifth segment form a right angled U-shape.

[0035] G) attaching a reinforcement element at an inner side of the first section,

[0036] H) forming a sixth segment extending from an edge of the second segment opposite the third segment by bending the first piece of sheet material,

[0037] I) Attaching the skirt element to the sixth section.

[0038] The embodiments and advantages described with reference to the first aspect of the present invention also apply to the second aspect of the present invention, and vice versa, but in order to avoid undue repetition, only one of the aspects may be described. This means that the device described with reference to the first aspect can be made by the method described with reference to the second aspect, and the method described with reference to the second aspect may include the formation of the device features described with reference to the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In the following description, embodiments of the present invention will be described with reference to the schematic diagrams, in which:

[0040] Figure 1 is a perspective view of a roof window installed in a pitched roof structure, the roof window having a flashing assembly;

[0041] Figure 2 yes Figure 1 An enlarged view of the section marked as II;

[0042] Figure 3 Corresponds to Figure 1 , but only the waterproofing assembly is shown, and the sealing element is removed;

[0043] Figure 4 Corresponds to Figure 2 , but only the waterproofing assembly is shown, and the sealing element is removed;

[0044] Figure 5 It is the bottom waterproof component. Figure 4 A local stereoscopic view at the position marked as V in FIG.

[0045] Figure 6 Shown along Figure 5 The cross section of line VI-VI in;

[0046] Figure 7 Is Figure 5 A top view indicated by arrow VII in FIG.

[0047] Figure 8 Shown along Figure 4 A cross section along line VIII-VIII in ;

[0048] Fig. 9 is a perspective view of a reinforcement element; and

[0049] Fig.10 Corresponds to Figure 8 , Fig.10It is only seen from a slightly different angle and also shows the bottom frame members and insulation frame of the roof window. DETAILED DESCRIPTION

[0050] First refer to Figure 1 and Figure 2 , shows a roof window 1 installed in a sloping roof structure 2, which is also called a pitched roof structure, wherein the joint between the roof window and the roof structure is covered with a flashing assembly 3. The roof structure is inclined in a downwardly inclined direction D, and includes rafters 21, a lower roof 22, a water-repellent strip 23 and a slat 24. Here, the roof structure and the flashing assembly are configured for use with a corrugated roofing material (not shown), such as tiles. The roofing material will be supported by the slats, and the bottom flashing member 30 of the flashing assembly is connected to a skirt element 31, which is configured to extend on the roofing material below the roof window. On the side flashing members 32 and the top flashing member 33, a sealing element 34 is provided for closing the gap between the flashing assembly 3 and the roofing material.

[0051] As in Figure 2 and in which the sealing element 34 on the side waterproof member 32 has been removed Figure 3 and Figure 4 As better seen in FIG. 1 , the bottom flashing member 30 comprises an elongated main element 301 and two end elements 302, one at each end of the main element as seen along the length axis L. The end elements overlap the side flashing members 32, and the skirt element 31 extends over the total length of the main element and the two corner elements, so that water draining from the side flashing members will be directed through the end elements to the skirt element, from which the water can drain under the roof windows onto the roof structure.

[0052] exist Figure 3 and Figure 4 In FIG. 3 , the main element 301 of the bottom flashing member 30 has been shown to be transparent so that the reinforcing element 35 located at the inner side of the main element is visible. The reinforcing element will be described in more detail below.

[0053] exist Figure 5 and Figure 6 The shape of the main element 301 of the bottom waterproof member 30 can be seen in FIG. Figure 5 and Figure 6 The right-hand end of the bottom waterproof member 30 is shown. Figure 4 A section corresponding to the position marked V in the figure and along Figure 5 In these figures, the roof windows, the roof structure and all other parts of the flashing assembly have been removed so that only the main element 301 and the right-hand end element 302 are visible.

[0054] The main element 301 comprises: a first section 3011, the first section 3011 extends along the length axis L and the height axis H; a second section 3012, the second section 3012 extends along the length axis and the width axis W; and a planar third section 3013, the planar third section 3013 extends along the length axis between the first section and the second section and is at an angle to both the first section and the second section. Therefore, the third section also extends at an angle to the height axis H and the width axis W.

[0055] exist Figure 6 In the embodiment in, the height axis H and the width axis W extend at an angle of 83 degrees relative to each other, the angle between the first segment 3011 and the third segment 3013 is 135 degrees, and the angle between the third segment 3013 and the second segment 3012 is 128 degrees.

[0056] In this embodiment, the total height h of the main element along the height axis H is approximately 40 mm, and the height of the first section 3011 and the width of the second section 3012 along the width axis W are each approximately 20 mm. It will be appreciated that these dimensions may vary depending on the intended use of the waterproofing member, and that relative dimensions, such as the width of the second section relative to the height of the first section, may also differ from that shown, for example to facilitate attachment of a skirt, as will be described below. The same applies to the angles mentioned above, and the need to change a dimension may result in changing one or both angles between the sections, or vice versa.

[0057] In addition to the first, second and third sections, the main element 301 here also includes: a fourth section 3014, which extends from the edge of the first section 3011 opposite to the third section; a fifth section 3015, which extends from the edge of the fourth section opposite to the first section; and a sixth section 3016, which extends from the edge of the second section opposite to the third section. All of these sections are made of a piece of metal sheet and are separated from each other by bending. The functions of the fourth, fifth and sixth sections will be described in more detail below.

[0058] The junction between the main element 301 and the right-hand end element 302 is embodied as a folded seam connector 303. Figure 7 301 . On the main element 301 , the edge has been bent so that the edge flange 3017 extends back along the body 3018 of the element, forming a hook-like shape. On the end element 302, the edge has been bent twice so that the edge flange 3027 extends back towards the body 3028, at a 90 degree angle to the body, and forms a hook-like shape that engages with the hook-like shape on the main element 301 . Figure 5and Figure 7 The folded seam connection shown in has been formed by the following steps in sequence:

[0059] Bend the edge flange 3017 of the main element 301 so that the edge flange 3017 extends at 90 degrees relative to the main body 3018;

[0060] Bending the edge flange 3027 of the end member 302 so that the edge flange 3027 extends 180 degrees relative to the main body 3028 to form a hook shape;

[0061] Hooking the end element 302 onto the edge flange 3017 of the main element 301 so that the edge flanges 3017, 3027 extend parallel and adjacent to each other; and

[0062] The two edge flanges 3017, 3027 are folded onto the main body 3018 of the main element, thereby forming Figure 7 The folded seam connector shown in .

[0063] The longitudinal axis can be adjusted by pressing in the direction indicated by arrow P perpendicular to the longitudinal axis. Figure 5 and Figure 7 The folded seam connector 303 shown in FIG. 1 is transformed into a flat-lock seam. When doing so, the sheet material of the main element 301 and the sheet material of the end element 302 will be compressed and in close contact with each other, thereby eliminating Figure 7 The space 3031 seen in the . This compression results in a stronger connection, and the absence of a space between the main element 301 and the end element 302 will also help improve water tightness, since the friction between the main element 301 and the end element 302 will prevent the main element 301 and the end element 302 from moving relative to each other.

[0064] It will be appreciated that the left hand end element may be connected to the main element in the same manner as described above, but this need not be the case and / or the end element may be embodied in a different manner. It is also possible to have a flashing with an end element at only one end, for example if the flashing is to be used in a group of roof windows mounted in close proximity to each other.

[0065] exist Figure 8 In the Figure 6 The main element 301 in the embodiment has a reinforcing element 35 at the inside of the first section 3011 , and a skirt element 31 is attached at the second section 3012 , and the skirt element 31 extends continuously with the second section 3012 .

[0066] Fig. 9The overall shape of the reinforcement element 35 shown in FIG. 3 is an L-shape, which has a first leg 351 extending along the first section 3011 and a second leg 352 extending along the fourth section 3014 in the installed state. Fig.10 In the mounted state shown in , the first leg extends along the outer side 111 of the frame member 11 of the frame of the roof window, here the bottom frame member, and is provided with holes 354 so that the reinforcing element can be attached to the frame member using screws or similar fasteners. The second leg 352 rests on the outer side 112 of the frame member 11, i.e. the side facing outwards in the mounted state of the roof window, and thus determines how deep the flashing member 30 reaches in the roof structure. In this embodiment, the reinforcing element 35 also includes a shorter third leg 353, which engages with the groove 113 in the outer side 111 of the frame member. The third leg can help to correctly position the flashing member 30 during installation of the flashing member 30 and can help to prevent the flashing member from being lifted off the frame member once installed, for example to prevent the flashing member from being lifted off the frame member under the influence of wind suction. The length of the second leg 352 corresponds to the distance between the first section 3011 and the fifth section 3015 of the main element 301, and the first section 3011 and the fifth section 3015 together with the fourth section 3014 form a right-angled U-shape so that the bottom waterproof member can be hooked onto the reinforcing element 35, such as Figure 8 and Fig.10 The unit composed of the main element 301 and the reinforcing element 35 is stronger and more rigid than the main element 301 alone, so that the bottom flashing structure has better resistance to wind loads, especially wind suction.

[0067] As in Figure 6 As best seen in the figure, the fifth section 3015 is here formed of two layers of sheet material bent over one another, wherein the inner layer 30151 is shorter than the outer layer 30152, so that a recess is formed between the inner layer and the fourth section 3014. This allows the bottom flashing member 30 to be snapped onto the reinforcing element 35, with the edge of the second leg 352 of the reinforcing element opposite to the first leg 351 engaging the recess. However, the fifth section may also be a simple single layer edge flange.

[0068] Likewise, the shorter third leg 353 of the reinforcing element 35 is shown here as being made from two layers of sheet material to provide strength and rigidity, but could also be a single layer edge flange.

[0069] The reinforcement element 35 shown is significantly shorter than the main element 301 along the length axis L. A longer reinforcement element will provide greater strength in the installed state, but may also make installation more difficult.

[0070] The bottom flashing member 30 may also be installed without the reinforcing element 35. In this case, the fourth section 3014 of the main element 301 will rest directly on the outer side 112 of the frame member 11, or the first section 3011 may be attached to the outer side 111 of the frame member 11 using screws or similar fasteners, as described above with reference to the reinforcing member. In the latter case, the main element may not have a fourth section.

[0071] like Figure 8 and Fig.10 As shown in the figure, the sixth section 3016 of the main element 301 is used to attach the skirt element 31. The sixth section 3016 forms a hook shape together with the second section 3012, and the skirt element also has a bent edge 311, thereby forming a hook shape. The two hook shapes engage each other and can be pressed together more tightly than shown to establish a firm connection. Alternatively or additionally, an adhesive or seal (not shown) can be provided between the two hook shapes.

[0072] like Fig.10 As can be seen in FIG. 1 , there is a space 4 between the bottom flashing member 30 and the insulating frame 5, which is arranged at the outer side 111 of the bottom frame member 11. This space can leave room for components of the roof structure or additional insulating material.

[0073] Also refer to Figure 6 As explained above, the slight upward inclination of the sixth section 3016 can facilitate connection with the skirt member 31, but in the embodiment shown, it corresponds to the inclination of the portion of the end element 302 extending from the end of the side flashing member 32 to the skirt member 31, as shown in Figure 4 As will be appreciated by those skilled in the art, this inclination will depend on the depth at which the roof window is to be installed in the roof structure and the type of roofing material to be used. If the flashing assembly 3 is intended for use with a flat roofing material such as slate, then such an inclination is not necessary and the first section 3011 and the second section 3012 of the main element may be perpendicular to each other.

[0074] The flashing assembly 3 shown in the drawings is constructed entirely of aluminum alloy 3003 tempered H41, whereas at least some elements of the applicant's prior art flashing assembly have been made of the more ductile aluminum alloy 8011, which contains less manganese and more iron and silicon.

[0075] The reinforcement element 35 may be made of the same aluminium alloy and the outer part of the skirt element 31 may also be made of the same aluminium alloy.

[0076] The flashing member has been described above mainly with reference to the bottom flashing member 30, but the flashing member may also be a top flashing member 33 or possibly a side flashing member 32, although end elements are usually used on the top flashing member and the bottom flashing member. The relative sizes of the first, second and third sections may then be different, and the fourth, fifth and sixth sections may be implemented in different ways or not exist. In the case of a top flashing member 33, the second section will be significantly longer than the second section 3012 shown in the figure, so that the second section can extend upwards under the roof material to above the roof window 1, or a flat sixth section may be provided which extends continuously with the second section. In the case of a side flashing member 32, the sixth section will replace Figure 2 The outer section 321 on which the middle sealing element 34 is located.

[0077] Reference numerals

[0078] 1 Roof windows

[0079] 11 Bottom frame member

[0080] 111 Outer part

[0081] 112 External side

[0082] 113 Grooves

[0083] 2 Roof structure

[0084] 21 rafter

[0085] 22 Under the roof

[0086] 23 Shun Shui Tiao

[0087] 24 Slats

[0088] 3 Waterproof components

[0089] 30 Bottom waterproof component

[0090] 301 Main Component

[0091] 3011 Part 1

[0092] 3012 Part 2

[0093] 3013 The third section

[0094] 3014 The fourth section

[0095] 3015 The Fifth Section

[0096] 30151 Inner layer

[0097] 30152 Outer layer

[0098] 3016 Section 6

[0099] 3017 Edge flange

[0100] 3018 Main Body

[0101] 302 End Components

[0102] 3027 Edge flange

[0103] 3028 Main Body

[0104] 303 Folding Seam Connector

[0105] 3031 Space

[0106] 31 Skirt element

[0107] 311 Bend Edge

[0108] 32 Side waterproofing components

[0109] 321 External segment

[0110] 33 Top waterproof component

[0111] 34 Sealing element

[0112] 35 Reinforcement elements

[0113] 351 First Leg

[0114] 352 Second Leg

[0115] 353 Third Leg

[0116] 354 holes

[0117] 4. Space

[0118] 5 Insulation frame

[0119] L Length axis

[0120] H Height axis

[0121] W Width axis

[0122] D Tilt direction

[0123] P Pressure

Claims

1. A flashing member for a roof window, the roof window comprising a frame, the frame comprising a top frame member, a bottom frame member (11) and two side frame members, the frame members defining a frame opening, and each frame member having an outer side (111) facing away from the frame opening, in, The waterproof member is made of sheet material. The waterproof component comprises an elongated main element (301) having two ends and at least one end element (302). wherein the main element (301) comprises a first section (3011) extending along a length axis (L) and a height axis (H) of the waterproof member, and a second section (3012) extending along the length axis and a width axis (W) of the waterproof member, the length axis extending between the two ends of the main element, and wherein the at least one end element (302) is attached to the main element (301) at one end and connected to the first section and the second section by a folded seam connection (303), It is characterized in that The primary element (301) further comprises a planar third section (3013) extending between the first section (3011) and the second section (3012), the third section extending along the length axis and at an angle to both the first section and the second section.

2. The waterproof component according to claim 1, characterized in that: The third section extends at an angle of 120 to 140 degrees relative to the first section and the second section.

3. The waterproof component according to claim 1 or 2, characterized in that: The third segment extends at an angle of at least 110 degrees relative to the first segment and the second segment.

4. The waterproof component according to claim 1 or 2, characterized in that: The height axis and the width axis are perpendicular to each other, and the first segment and the second segment extend in directions perpendicular to each other.

5. The waterproof component according to claim 1 or 2, characterized in that: The folded seam connection is a flat lock seam.

6. The waterproof component according to claim 1 or 2, characterized in that: The waterproof component further includes at least one of the following: a fourth segment (3014) extending from an edge of the first segment opposite the third segment, the fourth segment being configured to engage with an outer side of the frame member in an installed state, a fifth segment (3015), the fifth segment extending from an edge of the fourth segment opposite to the first segment, such that the first segment, the fourth segment and the fifth segment form a right-angled U-shape, a reinforcing element (35) configured to be mounted at an inner side of the first section, a sixth segment (3016) extending from an edge of the second segment opposite to the third segment, and A skirt element (31) attached to the sixth section or the second section.

7. The waterproof component according to claim 1 or 2, characterized in that: The flashing member is configured to be used as a bottom flashing member installed at the bottom frame member of a roof window installed in a sloped roof.

8. The waterproof component according to claim 6, characterized in that: The skirt element extends continuously with the second section.

9. The waterproof member according to any one of claims 1 to 2 and 8, characterized in that: The sheet material is sheet metal.

10. The waterproof member according to any one of claims 1 to 2 and 8, characterized in that: The total height of the main element along the height axis is 25 mm to 60 mm.

11. The waterproof member according to claim 3, characterized in that: The third segment extends at an angle of at least 120 degrees relative to the first segment and the second segment.

12. The waterproof component according to claim 9, characterized in that: The sheet material is aluminum.

13. The waterproof component according to claim 12, characterized in that: The aluminum includes at least 50% recycled aluminum.

14. The waterproof member according to claim 10, characterized in that: The total height of the main element along the height axis is less than 50 mm.

15. The waterproof member according to claim 14, characterized in that: The total height of the main element along the height axis is less than 40 mm.

16. A roof window installed in a sloping roof structure, characterized in that: The flashing member according to any one of claims 1 to 15 is installed at a bottom frame member of the roof window, and is located below the roof window when viewed in the inclination direction of the inclined roof structure.

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