EP3862503B1 - Eaves area with eaves metal sheet for draining rainwater at an eave - Google Patents

Description

The invention relates to an eaves area with an eaves plate for draining water in the area of an eaves.

On roofs, an eaves plate (also known as a hanging plate, inlet plate, gutter hanging or neck plate) is provided on the eaves (eaves for short) to drain off accumulating water (e.g. rainwater). This prevents water running off the roof from seeping into the masonry or substructure of the roof, which could cause ugly stains or damage to the building fabric.

The term eaves refers to the horizontal boundary line of a sloping roof surface downwards - the upper boundary line is the roof ridge (ridge for short). The length of the eaves usually corresponds to the width of the roof area.

A generic device in the form of an eaves plate for the drainage of water in sub-roof constructions with rafters is, for example, as a gutter inlet plate from DE 20 2015 001 832 U1 known, which essentially has an L-shaped cross section with a longer and a shorter leg. The longer leg is inserted between the roof covering and a roof substructure, the shorter leg protrudes a few centimeters over the eaves and points vertically downwards into a gutter installed there, so that rainwater can flow off the roof covering via the shorter leg into the gutter.

Moreover, there is also a like in 1 shown eaves plate known, which eaves side, in extension to an introduced between the roof shell and the roof substructure leg (e.g. the longer leg mentioned above), has a double-walled nose, which for eaves-side fixing of the eaves plate to the roof shell is introduced into an eaves envelope formed there and extending along the eaves. The eaves flashing is formed in one piece from a metal sheet aligned parallel to the roof shell, with a strip of it being folded over to form the double-walled nose in such a way that a fold on the eaves side is created, and an edge region of the folded strip is folded over perpendicularly towards the ground so that a fold is created on the ridge side . The folded edge has the same function as the short leg mentioned above. Such an eaves plate is used in particular for a metal roof covering. In such a case, long metal sheets are laid along the sloping roof, which protrude over the nose of the eaves sheet on the eaves side. The overhanging portions are folded over into a so-called eaves fold such that the nose is held in the folded area. The individual metal webs are connected to one another via so-called standing folds that reach up to the eaves.

However, this design is based on the problem that water that has gotten into the eaves flap can be drawn into the gap between the roof shell and the eaves flashing by capillary action. Since it is difficult for it to drain off from there again due to the capillary effect, problems with corrosion can occur there, particularly if the roof shell and the eaves flashing are made of metal. In addition, if the capillary effect is sufficiently strong, the water within the gap can rise so far against the roof pitch that it can penetrate into the roof substructure at the ridge-side end of the eaves flashing. This effect is particularly great if the roof is very flat and the rainwater cannot drain off quickly enough. Since the standing fold between the metal webs cannot be folded over, water can get into the eaves fold, especially there.

DE 2363 185 A1 discloses a construction element for assembling a roof gutter combined with a soffit and a fascia with first and second preformed parts.

US 2003/0159379 A1 discloses an apparatus and method for preventing damage from rotting of wooden members of concrete floor decks commonly used in multi-storey buildings and the like, and for preventing water and moisture accumulation above and below the concrete surface. The device includes an anchoring flange; a cavity section perpendicularly connected to the anchoring flange, containing in its base at least one perforation suitable for water drainage and a leg section extending downwardly from the intersection of the cavity section and the anchoring flange for application to the exterior of the building structure comprising the building structure protects.

GB 1 392 179 discloses a combined trim or skirting board and gutter for a roof which is extruded, molded or cast in one piece from synthetic plastics, preferably glass fiber reinforced polyester or PVC.

EP 3 173 544 A1 discloses an end profile for terrace and balcony comprising a visible area, a wall area running essentially parallel thereto and a fastening leg with at least one opening running essentially perpendicular to the areas.

EP 0 356 297 A1 discloses a cornice for a building intended to cover a facade wall or frame of a building for purposes of consolidation, anchoring and decoration. It consists of at least one finished part with at least one longitudinal cavity (4) capable of receiving anchoring or horizontal reinforcement means, the element defining a substantially flat base (2) and a substantially flat upper surface (7) and parallel to said base , as well as a decorative front face (1), optionally provided with a decorative pattern.

The invention is therefore based on the problem of creating an eaves area which prevents water from being drawn in under a roof shell by capillary action.

To solve this problem according to the invention, an eaves area with an eaves plate according to claims 1 to 13 is provided.

An eaves flashing utilized in the invention includes a first attachment strip and a second attachment strip extending in a longitudinal direction. The first attachment strip is adapted to be attached underneath and substantially parallel to a roof panel and the second attachment strip is adapted to be attached between the roof panel and a roof underframe. Between the first attachment strip and the second attachment strip is a longitudinally extending channel (or bead) having at least one drainage hole (or opening) in its wall.

An eaves area according to the invention comprises a cover plate, an eaves plate and a roof substructure. The flashing forms part of a roof shell extending from an eaves to a ridge. The eaves plate is aligned with its longitudinal direction parallel to the eaves and is attached with its first attachment strip below the cover plate to an area of the cover plate on the eaves side.

When the fascia used in the invention is attached to a roof shell as described above, the gutter increases a gap between the roof shell and the fascia so that a capillary action therebetween is weakened or interrupted. Water that rises in the direction of the ridge due to a capillary effect between the roof shell (or cover plate) and the first attachment strip is thereby prevented from rising further in the area of the gutter and collects in the gutter, where it drains off through the at least one drainage hole e.g. in a gutter underneath. This prevents water from infiltrating the roof shell and water from penetrating into a roof substructure. In addition, the stability of the roof shell is improved by the eaves plate attached to the roof shell.

Further developments of the invention and exemplary configurations are defined in the dependent claims.

According to the invention, the second attachment strip is sandwiched between the roof shell and a roof frame. This further increases the stability of the roof shell. Furthermore, by clamping, a certain displaceability of the eaves plate can be ensured, as a result of which temperature-related changes in size of the eaves plate and/or the cover plate can be compensated for. This can be an advantage, particularly in the case of metal roof shells and/or eaves plates, because without these, under unfavorable circumstances, the roof shell could bulge or warp.

According to the invention, the first attachment strip is incorporated into an eaves envelope. What is meant by eaves fold is a groove-like indentation, aligned on the ridge side and extending in the longitudinal direction (or along the eaves), on an edge region of the cover plate on the eaves side. For example, the eaves flap can be formed in that an eaves-side edge area of the cover plate is folded over in such a way that the cover plate encompasses, e.g. The three-sided enclosure prevents or at least limits the eaves flashing from sliding out on the eaves side. Furthermore, a certain slidability of the eaves flashing along the eaves is achieved provided that the clamping force on the first attachment strip and on the second attachment strip is kept low enough. Furthermore, such an attachment can be advantageous, for example, as mentioned above, to compensate for temperature-related changes in size. In this regard, it can also be advantageous if the material of the cover plate and the material of the eaves plate have the same or a similar coefficient of expansion.

According to a development of the invention, the first attachment strip is set up to be used as a bending edge when forming the eaves flap. This allows for easy assembly. An eaves plate set up in this way is characterized in that it has a higher flexural rigidity than the cover plate. However, the eaves flap can also be formed prior to the insertion of the first attachment strip.

According to a development of the invention, the first attachment strip and the second attachment strip lie in the same plane. This simplifies attachment of the eaves flashing below the roof shell.

According to a further development of the invention, the at least one drainage hole is offset in relation to an apex of the channel in the direction of the first attachment strip (ie on the eaves side). This optimizes the drainage of the water from the gutter, especially on a sloping roof. With regard to the size of the at least one opening of the channel, it must be taken into account that these are large enough so that individual drops cannot settle there due to their surface tension and block at least one drainage hole.

According to exemplary embodiments of the invention, the trough may be semi-circular, box-shaped, U-shaped, V-shaped or the like and is formed in one piece from sheet metal. At least three bending operations are carried out. In a first bending operation, a longitudinally extending first fold is formed between the first attachment strip and an adjacent first wall of the channel and in a second bending operation, a longitudinally extending second fold is formed between the second attachment strip and an adjacent second wall the gutter formed. A third bending operation is aimed at bending an area between the first fold and the second fold, for example to form a semi-circular or U-shaped channel bottom or to form a longitudinally extending third fold. A V-shaped groove, for example, can be formed by the third fold. To form a box-shaped trough, the third rabbet is formed between the first wall and a third wall of the trough located between the first wall and second wall, and further a fourth rabbet extending in the longitudinal direction is formed between the third wall and the second wall.

According to a development of the invention, the eaves area further comprises an eaves bracket, wherein the second attachment strip is attached between the fascia and a first leg of the eaves bracket, for example clamped therebetween, and a second limb of the eaves bracket points away from the fascia. This makes it possible to prevent the water flowing through the at least one drainage hole from coming into contact with a roof substructure or a wall, particularly in strong winds.

Fig. 1

zeigt schematisch eine Querschnittsansicht eines aus dem Stand der Technik bekannten Traufbereichs und ein damit verbundenes Problem.

Fig. 2

zeigt schematisch eine Perspektivansicht einer beispielhaften Ausgestaltung eines erfindungsgemäßen Traufbereichs.

Fig. 3A bis 3C

zeigen schematisch Querschnittsansichten von in der Erfindung genutzten Traufblechen.

Fig. 4

zeigt schematisch eine Perspektivansicht einer vorteilhaften Ausgestaltung eines in der Erfindung genutzten Traufblechs.

The invention is explained in more detail below with reference to the embodiments shown in the accompanying drawings. Identical or similar elements in these figures are provided with the same reference symbols. Reference signs with an apostrophe indicate the prior art. The invention is not limited to the specific embodiments shown, but rather the scope of the invention is determined by the subject matter of the claims.

1

Figure 12 shows schematically a cross-sectional view of a prior art eaves area and a problem associated therewith.

2

shows schematically a perspective view of an exemplary embodiment of an eaves area according to the invention.

Figures 3A to 3C

show schematic cross-sectional views of eaves flashing used in the invention.

4

shows schematically a perspective view of an advantageous embodiment of an eaves flashing used in the invention.

1 shows an eaves area 1' known in the prior art. The eaves plate 2' used here is formed in one piece from a metal sheet. A first leg 22' of the eaves plate 2' is inserted between a roof shell 3' and a roof substructure 4'. In extension to the first leg 22 ', the eaves plate 2' a double-walled nose 21 ', which for eaves-side fixing of the eaves plate 2' on the Roof covering 3' is introduced into an eaves envelope 31' formed there and extending along the eaves. A second leg 23' of the eaves plate 2' points vertically downwards into a roof gutter 5' fitted there. With an eaves area 1' designed in this way, water which has reached the eaves envelope 32' can be sucked into the gap 6' between the roof shell 3' and the eaves sheet 2' by a capillary effect. Since it is difficult for it to flow away again from there due to the capillary effect, corrosion problems can occur there, particularly if the roof shell 3' and the eaves plate 2' are made of metal. Moreover, if the capillary effect is sufficiently strong, the water within the gap 6' can rise so far against the roof pitch that it can penetrate the roof substructure 4' at the ridge-side end of the eaves plate 2'.

2 shows schematically a cross-sectional view of an exemplary eaves area 1 according to the invention. Such comprises a cover plate 31, which forms part of a roof shell 3, which extends from an eaves to a ridge of a roof, a roof substructure 4 and an eaves plate 2 used in the invention Cover plate 31 can be, for example, a metal strip of a common metal roof covering and can be connected to another cover plate, for example by means of standing folds (not shown). The eaves flashing 2 used in the invention comprises a first attachment strip 21 and a second attachment strip 22 and a gutter 24 therebetween. The first attachment strip 21, the second attachment strip 22 and the gutter 24 extend in a longitudinal direction along the eaves (here perpendicular to the plane of the drawing). The channel 24 has at least one drainage hole 242 in its wall 241 . Preferably, the first attachment strip 21 and the second attachment strip 22 lie in one plane. The eaves plate 2 is attached below the cover plate 31 with the first attachment strip 21 to an area of the cover plate 31 on the eaves side. This improves the stability of the cover plate 31 or the roof shell 3. An eaves flap 32 is formed in an area of the cover plate 31 on the eaves side, into which the first attachment strip 21 is inserted. An eaves turn-up 32 is a groove-like indentation that extends along the eaves and is oriented at the ridge side. The eaves flap 31 includes the first attachment strip 21 at a top, a eaves side and an underside. As a result, the eaves plate 21 is connected to the cover plate 32 by a positive fit. The eaves flap 32 can also be configured to apply a clamping force to the first attachment strip 21 . The eaves fold may be formed in advance, or the first attachment strip may be used as a fold around which an edge portion of the shroud 31 is folded. Introducing the first attachment portion 21 into an eaves flap 32 formed on the cover plate 31 is a preferred fastening means. However, the first attachment strip 21 can also be attached to the cover plate 31 by an additional conventional fastening means, eg welded, screwed or riveted thereto.

The second attachment strip 22 is arranged between the roof shell 3 or the cover plate 31 and a roof substructure. The second attachment strip 22 lies on a roof substructure 4 and is clamped between the roof shell 3 or cover plate 31 and the roof substructure 4 .

The roof substructure 4 means all common and suitable roof substructures or supporting structures, in particular those for a metal roof covering. Such are known to the person skilled in the art and 2 therefore only indicated schematically. For example, such a roof substructure 4 can have a rafter. This can be adapted to a roof pitch. Roof boarding can lie on top of the rafters, for example in the form of a continuous layer of boards. A cover sheet can be provided on the roof boarding, for example roofing felt or a sheet of plastic. Counter battens can also be arranged on the cover sheet. A transverse roof batten can lie on this, so that the counter battens and the cross battens form a grid. An eaves board or eaves board can be provided at the eaves of the counter battens, which forms the lowest roof batten. A second attachment strip 21 resting on the roof substructure 4 can rest, for example, on the eaves board or the eaves board.

As described in the introduction, water that has gotten under the roof shell 3 can be sucked into the gap 6 between the cover plate 31 and the first attachment strip 21 by a capillary effect and rise in the direction of the ridge. The groove 24 in the eaves plate 2 increases the gap 6 between the cover plate 3 and the eaves plate 2, so that a capillary effect between them is weakened or interrupted. This prevents water that has penetrated into the gap 6 from rising further and collects in the channel 24, where it can flow out through the at least one drainage hole 242, for example into a gutter 5 arranged underneath. This prevents water from infiltrating the roof shell 3 in the area of the second attachment strip 22 and ingress of water into a roof substructure 4 is prevented. The channel 24 thus acts as a capillary barrier.

The at least one drainage hole 242 can be offset on the eaves side in relation to an apex of the gutter 24, for example in such a way that, taking into account the pitch of the roof, the at least one drainage hole 242 is at a lowest point of the gutter 24 when the eaves flashing 2 is on the roof shell 3 is attached. This optimizes the drainage of water that collects in the channel 24 from the channel 24 . The length and width of the at least one drainage hole is selected in such a way that, on the one hand, the rigidity of the eaves plate 2 and in particular of the gutter 24 is not endangered and, on the other hand, the individual water droplets do not stick to the at least one drainage hole 242 due to their surface tension and block it. The at least one drainage hole can be, for example, a circular opening or an oblong opening and can be made, for example, by stamping or drilling the wall 241 of the channel 24 .

Below the at least one drainage hole 242 in the wall 241 of the gutter 24, the eaves area 1 can also provide a gutter 5, which is arranged below the at least one drainage hole 242 of the eaves plate 2 such that water running off over the cover plate 3 runs into the gutter 5. The gutter 5 can be attached to the roof substructure 4 in a known manner.

The eaves area 1 can also have an eaves angle 7 . What is meant by this is a gutter inlet plate which forms an angle between two legs 71 , 72 . The first leg 71 is inserted between the eaves plate 2 and the roof substructure 3 on the ridge side, for example clamped in between or fastened to it with another fastening means mentioned above. The second leg 72 points away from the cover plate 31, e.g. essentially perpendicularly downwards, into a gutter 5 provided there. The angle between the first leg 71 and the second angle is preferably between 70° and 130°. The additional eaves angle 7 can be used to prevent water flowing through the at least one drainage hole 242 from coming into contact with a roof substructure 4 or a building wall, particularly in strong winds. The eaves angle 7 can be provided separately from the eaves sheet 2 or be formed in one piece with the eaves sheet 2 .

Figures 3A - 3C show schematic cross-sectional views of exemplary configurations of an eaves flashing 2 used in the invention. The statements made above with regard to the eaves flashing 2 also apply here. The longitudinal direction of the eaves plate 2 is perpendicular to the plane of the drawing. The channel 24 can, for example, be semicircular or U-shaped ( Figure 3A ), V-shaped ( Figure 3B ), boxy ( Figure 3C ) or the like. The eaves flashing 2 has a longitudinally extending first fold 243 between the first attachment strip 21 and an adjacent first wall 247 of the gutter 24, and a longitudinally extending fold 243 between the second attachment strip 22 and an adjacent second wall 248 of the gutter 24 Longitudinally extending second fold 244. A region between the first fold 243 and the second fold 244 is curved, for example semicircular or U-shaped as in FIG Figure 3A shown, or bent to a third fold 245 as in Figures 3B and 3C shown. The third fold 245 is formed between the first wall 247 and a third wall 249 of the channel 24 lying between the first wall 247 and the second wall 248 . In Figure 3C the channel 24 also has a fourth fold 246 between the third wall 249 and the second wall 248 . As in Figures 3B and 3C As shown, the first wall 247, the second wall 248 and the third wall 249 may be substantially strip-shaped and extend in the longitudinal direction. Preferably, the eaves plate 2 is formed in one piece, for example from a Sheet metal or molded from plastic. Manufacturing the eaves flashing 2 comprises at least three bending operations, namely one to form the first fold 243, one to form the second fold 244, and a third bending operation is aimed at bending an area between the first fold 243 and the second fold 244.

4 shows a perspective view of a further exemplary embodiment of the eaves plate 2. The statements made above with regard to the eaves plate 2 also apply here. Moreover, a first fold angle α formed between the first attachment strip 21 and the first wall 247 is smaller than a second fold angle β formed between the second attachment strip 22 and the second wall 248, and a third fold angle β formed between the first wall 247 and the third wall 249 γ is smaller than a fourth fold angle θ formed between the third wall 249 and the second wall 248 . The folding angle always means an angle smaller than 180°. The first fold angle α is 90°±5°, for example, the second fold angle β is 135°±5°, for example, the third fold angle γ is 90°±5°, for example, and the fourth fold angle θ is 135°±5°, for example. The at least one drainage hole 242 has a circular shape and is arranged on the third fold 245 . The third wall 249 is substantially parallel to the first attachment strip 21 and the second attachment strip 22. A width b1 of the first attachment strip 21 is 1 cm or larger, for example between 1 cm and 4 cm. A width b2 of the second attachment strip 22 is 15 cm or larger, for example between 15 cm and 20 cm. A width b3 of the first wall 247 is 1 cm or larger, for example between 1 cm and 3 cm. A width b4 of the second wall 248 is 1 cm or larger, for example between 1 cm and 3 cm. The angles and widths given above have proven to be advantageous, but should not be interpreted as restrictive.

The term "sheet metal" should not be understood as restricting the material, rather the eaves sheet 2 can be made of metal, a metal alloy, plastic or a plastic-metal alloy.

Reference list:

1

eaves area

2

eaves plate

21

first attachment strip

22

second attachment strip

24

gutter (or bead)

241

wall of the gutter

242

drainage hole

243

first fold

244

second fold

245

third fold

246

fourth fold

247

first wall of the channel

248

second wall of the gutter

249

third wall of the gutter

3

roof shell

31

cover plate

32

eaves envelope

4

roof substructure

5

gutter

6

gap

7

eaves angle

71

first leg

72

second leg

Claims (13)

1. Eaves area that possesses:

   a cover plate (31) that forms part of a roof shell (3) extending from an eave to a ridge;

   a roof substructure (4);

   an eaves plate (2) to divert water on an eave, in particular into a gutter (5), said plate exhibiting:

   a first attachment strip (21), extending in a longitudinal direction, which in addition is arranged below and to be attached essentially parallel to a roof shell (3);

   a second attachment strip (22), extending in a longitudinal direction, which is arranged to be placed between the roof shell (3) and a roof substructure (4); and

   a gutter (24) extending in a longitudinal direction, which is arranged between the first attachment strip (21) and the second attachment strip (22) and has at least one drainage hole (242) in its wall, wherein the eaves plate (2) is aligned with its longitudinal direction parallel to the eave and with the first attachment strip (21) below the cover plate (31) is attached to an eaves-side area of the cover plate (31) and in which the eaves plate (2) rests with the second attachment strip (22) on the roof substructure (4), and

   in which the eaves plate (20) is clamped between cover plate (31) and roof substructure (4), characterised in that

   the first attachment strip (21) is introduced into an eaves envelope (32) at the eaves-side region of the cover plate (31).
2. Eaves area according to claim 1, further comprising an eaves angle (7), wherein the second attachment strip (22) is mounted between the cover plate (31) and a first leg (71) of the eaves angle (7), and a second leg (72) faces away from the cover plate (31).
3. Eaves area according to one of claims 1 to 2, in which the first attachment strip (21) of the eaves plate is set up as a bending edge for forming an eaves envelope (32).
4. Eaves area according to one of claims 1 to 3, in which the first attachment strip (21) and the second attachment strip (22) of the eaves plate lie in the same plane.
5. Eaves area according to one of claims 1 to 4, in which the at least one drainage hole (242) is offset in the direction of the first attachment strip (21) with respect to an apex of the gutter (24).
6. Eaves area according to one of claims 1 to 5, with a longitudinally extending first fold (243) between said first attachment strip (21) and an adjacent first wall (247) of said gutter (24); and a longitudinally extending second fold (244) between said second attachment strip (22) and an adjacent second wall (248) of said gutter (24).
7. Eaves area according to one of claims 1 to 6, in which the at least one of the first wall (247) and the second wall (248) of the eaves plate is essentially strip shaped and extends in the longitudinal direction.
8. Eaves area according to one of claims 1 to 7, with a third longitudinally extending fold (245) between said first wall (247) and a third wall (249) of said gutter (24) lying between said first wall (247) and said second wall (248); and a fourth longitudinally extending fold (12) between said third wall (249) and said second wall (248).
9. Eaves area according to claim 8, in which the at least one drainage hole (242) is located on the third fold (245).
10. Eaves area according to claim 8 or 9, in which the third wall (249) of the eaves plate is essentially strip shaped and extends in the longitudinal direction.
11. Eaves area according to one of claims 8 to 10, in which the third wall (249) is essentially parallel to at least one of the first attachment strip (21) and the second attachment strip (22).
12. Eaves area according to one of claims 1 to 11, wherein the eaves plate is formed in one piece.
13. Eaves area according to one of claims 1 to 12, in which the first attachment strip (21) of the eaves plate is arranged on the eaves side and the second attachment strip (2) of the eaves plate is arranged on the ridge side.

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