GB2351507A

GB2351507A - Roofing member for finishing the perimeter of a roof

Info

Publication number: GB2351507A
Application number: GB9909610A
Authority: GB
Inventors: David Brian George; John Ernest Muttock; Stefan Martin Nalborczyk; Michael James Paul Turner
Original assignee: RUBEROID BUILDING PRODUCTS Ltd; Gradient Insulations UK Ltd
Current assignee: RUBEROID BUILDING PRODUCTS Ltd; Gradient Insulations UK Ltd
Priority date: 1999-04-26
Filing date: 1999-04-26
Publication date: 2001-01-03
Also published as: GB9909610D0

Abstract

A member 1 for finishing the perimeter of a roof comprising a relatively rigid, foldable substrate 6 and a relatively flexible, substantially waterproof membrane 7 bonded thereto, an edge 8 of the membrane being received in a protective element 9 which protects the edge. The element 9 at edge 8 is crimped to the membrane to secure them together.

Description

2351507 ROOFING The invention relates to roofing, and in particular to a

member for finishing a perimeter of a roof, a set of parts including such a member, a roofing system, a roof and a building.

The perimeter or edges of a roof, particularly a checked or flat roof require to be finished with what are known to this person skilled in the art as detail units. These are often pre-formed units, or members, which are often used with a single layer mechanically fastened plastic or rubber roof water proofing membrane. However, the prior membranes are liable to damage, and moreover a plurality of different shaped members are required for different uses, for example to finish a roof at an internal or an external corner. This increases the number of members which must be bought or stored, and their susceptibility to damage also increases cost as damaged members have to be replaced as their use could lead to leakage.

It is an object of the invention to seek to mitigate these disadvantages.

According to a first aspect of the invention there is provided a member for finishing a perimeter of a roof, comprising a relatively rigid, foldable, substrate and a relatively flexible substantially waterproof membrane bonded thereto, an edge of the membrane being received in a protective element which protects that edge.

The protective element may comprise an integral part of the substrate. This provides for ease of manufacture and a potentially leak free construction.

The substrate may comprise a metal sheet and the protective element may comprise an edp e part thereof which is bent back on itself to provide a seat for the edge of the membrane. This provides for a positive location of the edge.

The protective element may be formed to grip the edge of the membrane whereby to secure the membrane in position. This construction can ensure that the membrane is securely held in place.

The member may be elongate, and the membrane may extend at each end beyond the metal. This provides for bending of the membrane to a roofing membrane, and can provide for application at a corner of a roof.

The metal may have means to permit folding. This provides for bending of the member at a corner, particularly where the means may comprise a notch in the metal.

The member may be generally of L-shape in end elevation. This provides for use C, as an upstand or as a drip member.

The membrane may be bonded to the substrate over part of the width of the membrane whereby to provide a membrane flap. This provides for ease of bonding.

The membrane may be wider than the substrate.

The membrane may be bonded to the substrate over its whole width, particularly where the membrane and substrate have the same width.

A member according to the membrane may be bituminous.

3 The membrane may be bonded to the substrate by being self adhesive, particularly by being self-adhesive by being fusible by hot gas impinging element. This provides for case of installation in situ.

The member may provide an upstand unit which taper from one end to the other, preferably the taper may be about 3Imm over the length of the member.

The member may comprise a drip member, or a kerb drip member, or, again a :zl corner member.

Such a corner member may be adapted for use at an internal or an external corner of a roof. This provides for flexibility in use.

The membrane may have an external coating.

The coating of the membrane may comprise stone clips or the like. This provides a protection of the membrane outer surface, and a pleasing appearance.

According to a second aspect of the invention there is provided a set of parts for a roofing system, comprising a plurality of members as hereinbefore defined, each adapted for finishing the perimeter of the roof.

The set may include fixing means for fixing a member to a roof.

The fixing means may comprise a mechanical fastening means, such as a plurality of roofing nails.

The set may comprise at least an upstand member, a drip member, a kerb member and a corner member.

4 According to a third aspect of the invention there is provided a roofing system, comprising a roofing membrane applied to a roof, and a member as hereinbefore defined or a set of parts as hereinbefore defined applied to the roof to finish at least part of the perimeter thercof.

The membrane of at least one may be a member applied over a waterproofing membrane of the roof.

The membrane of at least one member may be applied under a waterproofing membrane of the roof.

There may be a plurality of members comprising upstand members laid adjacent one another longitudinally with their tapered parts fitted together to provide a uniform height along the upstand.

The roofing membrane may comprise a bituminous roofing membrane.

According to a fourth aspect of the invention there is provided a building, including a roofing system as hereinbefore defined.

A member for finishing a perimeter of a roof, a set of parts for a roofing system, a roofing system and a roof embodying the invention are hereinafter described, by way of example, with reference to the accompanying drawings.

Fig. 1 is an end elevation of an upstand member for a roof according to the invention; Fig. 2 is an elevational view of the member of Fig. 1; Fig. 3 is an end elevational view of a drip member according to the invention; Fig. 4 is an end elevational view of a kerb drip member according to the invention, Fig. 5 is an enlarged elevational view of a member for an upstand corner of a roof for use with the member of Figs. 1 and 2; Fig. 6 is an enlarged perspective view of a drip corner member for a roof. , Fig. 7 is a perspective view of a longitudinal edge member for an edge of a roof for use with the corner of the member of Fig. 6; Fig. 8 is a schematic sectional view of a roof with a member as shown in Fig. 4 in position, the roof being a "check" roof; and Fig. 9 shows a view similar to Fig. 8, the roof being flat.

Referring to the drawings, in which like parts are referred to by like numerals, there are shown members 1,2,3,4 and 5 for finishing the perimeter of a roof, Figs. 1 and 2 showing an upstand member 1, Fig. 3 a drip member 2, Fig. 4 CI being a kerb drip member 3, Fig. 5 being a drip corner member 4, Figs 6 upstand corner member 5 and Fig. 7 an elongate edge member 5' for use with the member 5.

Each member 1 to 5' is a pre-formed unit comprising a relatively rigid, foldable substrate 6 and a relatively flexible substantially waterproof membrane 7 bonded thereto, an edge 8 of the membrane being received in a protective element 9 which protects that edge.

6 In the embodiments shown, the substrate 7 is a metal sheet, typically of galvanised steel, which is of generally L-shape in end elevation, to the outer surface (as considered in use) of which the membrane 7, which is a bituminous roofing membrane, is bonded as by being self adhesive and beincr secured thereto. The members I to 5 are made by bonding a flat sheet of bituminous membrane 7 to the flat metal sheet 6, which is then bent into the required L-shape to the form upstand, drip, kerb drip, corner or edge members 1-5'.

The free edge of the galvanised metal, the lower edge as seen in the drawings and as considered in use, is folded back on itself to form the protective element 7, which is of U- or J-shape and shown and which is crimped onto the edge 8 of the membrane 7, so that the bituminous membrane 7 is protected against lifting off the substrate 6 and against damage such as tearing or wearing, the bitumen membrane also being securely held in place as it is crimpled by the folded back edge 9 of the galvanised steel substrate 7.

The members 1 to 5' are elongate, as shown in Figs. 2, 5, 6 and 7, the vertical height, particularly of the upstand member I (Figs. 1,2), though all the members can have similar constructions, decreasing from one end to the other, in the embodiments by 3mm, so that the members taper from say the left hand end as viewed to the right hand end. Stated in another way, the left hand end is in the embodiments about 3mm higher than the right hand end of the members (or vice versa). This simplifies fitting adjacent members together longitudinally along the edge of a roof, and enables a neater finish to be achieved as the, say, upstand is the same heicht over the length of the roof edge.

z:1 In Figs. 1 and 2, the upstand member 1 shown has a membrane which has one limb which is wider than the associated limb 11 of the substrate 6, so providing a membrane flap 10 which is loose and can be moved relative to the rest of the 7 member 1.

In Fig. 3, the membrane 2 is a drip member for applying to the edge of a flat roof (Fig, 9) and which has an upturned (in use) drip lip 13 the membrane 7 and 14 and limb 15 of the member 2 having the same width and being bonded together over the whole surface area so that there is no flap.

Fig. 4 is a kerb drip member 3, the membrane having a limb 16 which is wider than the associated limb 17 of substrate 6 to which it is bonded, and having a loose, or unbonded, part providing a membrane flap as in Figs. 1 and 2.

Fig. 5 shows an upstand corner membrane 4, that is a member which can be used at a corner with an upstand in other words a wall which rises from the roof level. The substrate 6 has means to provide for folding or bending of the member 4 into or out of the plane of the Figure to a desired angle depending on the corner, in the form of V-shaped notches 18, 20 in the limb 19 and in the folded over or crimpled part 9 respectively, the apices of the notches lying on the same notional line. The member 11 can then be used at an internal and external corner, which reduces the number of different pre-formed members required to be bought, transported and stored.

The membrane 7 is both longer than the substrate, and is wider than the limb of the substrate, to provide a flaps 21,22. The overlap flaps 21 at the ends of the member 4 allows the member to be bonded with the membrane of a similar member. The extend of membrane stick is shown at 22'.

Figs. 6 shows a drip corner 5, which is similar to the member of Fig. 5, but which is essentially an "inside out" version thereof so that the member 5 can be applied to a simple corner of the roof without an upstand, those notches 18, 20 8 again allowing the member 5 to be bent to the required angle about the notional line joining the apices of the V-shaped notches into or out of the plane of the paper to provide for application to an external or internal corner, the longitudinally extending flaps being used to overlap flaps 21 of another member and to be bonded thereto to provide a continuous edge.

Fig. 7 is an elongate edge member 5' of L-shape for bonding at each end with a member 5 of Fig. 6. There is one flap 21 extending beyond the metal substrate 6, which is exposed at the opposite end.

Fig. 8 shows a member of any of Figs I to 7 applied to a roof 22 the edge of which is a check kerb 23, or stated in another way, has a step or rebate 24. In this application, a waterproofing membrane 25 is applied over the main roof area in one or more layers, a member such as the member 4 of Fig. 4 is placed over the edge, at the perimeter of the roof 22 to "finish" that roof, the flap 16 is lifted, and securing means 26 such as roof nails are driven through the substrate and roofing membrane at spaced intervals. The flap 16 is then lowered to lie over the nails 26, and the membrane flap is sealed by any suitable means, suitably by hot welding by applying a blast of hot air or gas which softens the bituminous membrane sufficiently for it to be bonded in place when it hardens.

Fig. 9 shows a flat roof 12. In this case a member such as the drip member 2 of Fig. 3) is placed in position, over a batten 27 as before, and is secured in position by fixing means such as spaced roofing nails 26. The waterproofing membrane 25 (two in Figs. 8 and 9) is then laid over the limb 14,15 and secured in position by hot air welding as before, though in both cases an adhesive could be used.

In every embodiment, where a longitudinal run of members 1 to 5 is provided along an edge at perimeter of the roof 12,22 flaps 21 of the membranes 1 to 5' t__ 9 of overlapping members are also bonded together using hot air welding. Also, the tapered upstands provide for a neat appearance and for a simplified fitting of adjacent members together longitudinally.

Thus the members I to 5' described hereinbefore with reference to the drawings provide a set of parts, or a modular system, which can be applied in situ, particularly the corner units, of which only one kind is required for both an internal and an external corner, or, stated in another way, only one of the Fig. 5 embodiment and one of the Fig. 6 embodiment is required, the corner units being manipulated in situ for any particular angle of corner. In all embodiments too, the drip detail can be built up in situ to allow water to drip off the edge of the roof, and the crimpled or protective element 9 retains the membrane 7, protects the edge thereof and essentially helps it in place indefinitely, and also protects the edge against inadvertent damage by workers working on say a fascia. All the embodiments reduce the work required on a building site and yet achieve waterproofing of a roof perimeter by a simple and overall relatively easy fitting procedure.

In all embodiments, the internal surface of the membrane has a coating for example of stone chips to provide a protective surface and an aesthetic appearance.

Claims

CLAIMS:

L A member for finishing a perimeter of a roof, comprising a relatively rigid, foldable, substrate and a relatively flexible substantially waterproof membrane bonded thereto, an edize of the membrane being received in a protective element which protects that edge.
2. A membrane according to claim 1, the protective element comprising an integral part of the substrate.
3. A membrane according to claim 2, the substrate comprising a metal sheet and the protective element comprising an edge part thereof which is bent back on itself to provide a seat for the edge of the membrane.
4. A member according to claim 3, the protective element being formed to grip the edge of the membrane whereby to secure the membrane in position.
5. A member according to either of claims 3 or 4, which is elongate, the membrane extending at each end beyond the metal.
6. A member according to claim 5, the metal having means to permit folding.
7. A member according to claim 6, the means comprising a notch in the metal.
8. A member according to any preceding claim, the member being generally of L-shape in end elevation.
9. A member according to any preceding claim, the membrane being bonded 11 to the substrate over part of the width of the membrane whereby to provide a membrane flap.
10. A member according to claim 9, the membrane bein2 wider than the substrate.
11. A membrane according to any of claims I to 9, the membrane being bonded to the substrate over its whole width.
12. A membrane according to claim 11, the membrane and substrate having the same width.
13. A member according to any preceding claim, the membrane being bituminous.
14. A member according to claim 13, the membrane being bonded to the substrate by being self adhesive.
15. A member according to claim 14, the membrane being self-adhesive by being fusible by hot gas impingement.
16. A member according to any preceding claim, providing an upstand unit which tapers from one end to the other.
17. A member according to claim 16, the taper being about 3mm over the length of the member.
18. A member according to any of claims 1 to 15, comprising a drip member.

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19. A member accordinQ to anv of claims 1 to 15, comprising a kerb drip member.
20. A member according to any of claims 1 to 15, comprising a corner member.
21. A member according to claim 20, the corner member being adapted for use at an internal or an external corner of a roof.
22. A member according to any preceding claim, the membrane having an external coating.
23). A member according to claim 22, the coating comprising stone chips or the like.
24. A member for finishing the perimeter of a roof, substantially as herembefore described with reference to the accompanying drawings.
25. A set of parts for a roofing system, comprising a plurality of members according to any preceding claim, each adapted for finishing the perimeter of the roof.
26. A set according to claim 25, including fixing means for fixing a member to a roof.
27. A set according to claim 26, the fixing means comprising a mechanical fastening means.
A set according to claim 27, the fastening means comprising a plurality of 13 roofing nails.
29. A set according to any of claims 25 to 28, comprising at least an upstand t t member, a drip member, a kerb member, a corner member and an edoe member.

C_
30. A set of parts for a roofing system, substantially as hereinbefore described with reference to the accompanying drawings.
31. A roofing system, comprising a roofing membrane applied to a roof, and a member according to any one of claims 1 to 24 or a set of parts according to any of claims 25 to 30 applied to the roof to finish at least part of the perimeter thereof.
32. A roofing system according to claim 31, the membrane of at least one member being applied over a waterproofing membrane of the roof.
33. A roofing system according to claim 31, the membrane of at least one member being applied under a waterproofing membrane of the roof.
34. A roofing system according to any of claims 31 to 33, there being a plurality of members comprising upstand members laid adjacent one another longitudinally with their tapered parts fitted together to provide a uniform height along the upstand.
35. A roofing system, the roofing membrane comprising a bituminous roofing membrane.
36. A roofing system, substantially as hereinbefore described with reference to the accompanying drawings.

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37. A building, including a roofing system according, to any of claims 31 to 36.