GB1597868A

GB1597868A - Roof cladding

Info

Publication number: GB1597868A
Application number: GB2523478A
Authority: GB
Original assignee: Conder International Ltd
Current assignee: Conder International Ltd
Priority date: 1978-05-31
Filing date: 1978-05-31
Publication date: 1981-09-16

Description

(54) ROOF CLADDING (71) We, CONDER INTERNATIONAL LIMITED, of 23 St. Peter Street, Winchester, Hampshire, a British Company, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:- The -present invention provides a roof cladding as set forth in Claim 1, a building as set forth in Claim 16 and a method as set forth in Claim 17.

The lining acts as a tray to allow any moisture that is condensed within the cavity between the liner and the outer cladding to drain to the eaves. Gaps are left for such drainage, and the water can run down below for instance a fibre-glass insulation in the cavity, provided the insulation is not compressed. The lining can be made for instance in a cheap material such as galvanized steel and can be thin and can be made by a single operation pressing or rolling, thus being inexpensive and comparable in price to for instance plaster-board. The spacers form a constant height gap between the lining and the outer cladding, and thus enable one to make full use of insulation placed in the cavity, while avoiding compression and thus loss of effectiveness of the insulation. In this way good U-values (low heat loss per unit area per degree temerature difference) can be obtained.

Preferred features of the invention are set forth in Claims 2 to 15, 18 and 19. With particular reference to Claim 11, the raised portions on the lining sheets may be upturned margins along their lateral edges and/or corrugations, and the features of Claim 11 or 12 enable the sheets forming the outer cladding or the lining to be laid side by side to an exact module, i.e. with precisely predetermined distances between a point on one sheet and a corresponding point on the next sheet, the spacers acting in effect as jigs. The feature of Claim 13 allows direct fixing of the outer cladding through the crowns of the corrugations, reducing the possibility of leaks.

The invention will be further described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a vertical section through the roof cladding of a building, taken parallel to the ridge of the roof; Figure 2 is a vertical section through the roof cladding, on a larger scale, taken normal to the ridge of the roof, generally as indicated by the line II-II in Figure 1; Figure 3 is a vertical section, corresponding to that of Figure 1, but showing a cable tray and adjacent parts on a larger scale; and Figure 4 is a view of a blank used for making a spacer, on the same scale as that of Figure 1.

The building has generally conventional structural support members, including purlins 1 which run parallel to the ridge 2 of the roof. A roof lining in the form of a plurality of tray-like sheets 3 is placed over the purlins 1; each sheet 3 has raised portions or upturned margins 4 along its edges which extend up the slope of the roof and has further raised portions or corrugations 5 which run up the slope of the roof. Long spacers 6 are placed on the lining sheets 3 so as to extend parallel to the ridge 2 of the roof, resting on and supported by troughs of the lining sheets 3, and the lining sheets 3 are accurately positioned so that their raised portions (the margins 4 and the corrugations 5) are located correctly in recesses 7 in the spacers 6, as shown in Figure 1.The spacers 6 may be of U-shape (as shown in Figure 2) or of Z-shape (not shown), and the spacers 6 are secured to the purlins 1 by self-drilling screws which pass through the lining sheets 3 and thus secure the spacers 6 to the lining sheets 3; alternatively, any other suitable securing means such as rivets or welding can be used to secure the sheets 3, spacers 6 and purlins 1 together. A quilt (only part of which is shown in Figure 1 and which is not shown in Figure 2) or other thermal insulation 8 is laid over the lining sheets 3 and is punctured where it passes over upstanding portions 9 of the spacers 6 so the tops of the upstanding portions 9 stick up through the insulation 8.A corrugated outer cladding 10 is then placed in position on the spacers 6 so that the upstanding portions 9 engage under crowns 11 of the corrugations of the outer cladding 10, the crowns 11 then being directly secured to the upstanding portions 9 of the spacers 6 by self-drilling screws (or any other suitable securing means such as rivets or welding) which, if appropriate, penetrate through the crowns 11. The outer cladding 10 is thus supported by the spacers 6 and thereby spaced above and supported by the lining sheets 3. The roof is then provided with a conventional construction for the ridge 2 of the outer cladding 10, while the ridge of the lining sheets 3 can be formed by a bent lining sheet 3, as indicated in Figure 2.Barge-boards (not shown) can be provided along the gables in a conventional manner, and eaves gutters 12 are provided having their rear walls 13 below the level of the eaves edge of the lining sheet 3 and their front upstands 14 concealing the eaves edge of the roof; a valley gutter could be similarly positioned. Alternatively, in view of the small amounts of water flowing down the sheets 3, drainage could be into the cavity of a double-skin wall cladding.

In detail, it will be seen from the left hand side of Figure 1 and from Figure 3 that the margins 4 of the lining sheets 3 may be secured together by any suitable securing means 15. A support for services or cable tray is formed by a member 16 which is of generally inverted T-shape when seen looking up the roof slope (as in Figure 3) and a cover member 17 which clips over and conceals the arms of the T of the member 16 and at the same time closes the gap which is formed between the lowermost parts of adjacent lining sheets 3. The members 16 are spaced apart and can have a fish-hook tag 18 for initial (or permanent) retention and be secured by the securing means 15.Each member 16 can be formed from a blank which had a divided lower half, one part which was bent to the left and the other part of which was bent to the right, as seen in Figure 3spacers 6 can 3. formed of sheet The spacers 6 can be formed of sheet metal, and, as shown in Figure 4, the blank from which the spacer is made can have substantially the same non-rectilinear profile along its top as along its bottom so that a series of such blanks can be cut from a strip of sheet metal. Figure 4 shows that the spacer 6 has a bottom lip 19 which is interrupted at the recesses 7 but extends along a substantial part of the bottom edge of the spacer 6, and top lips 20 on the tops of the upstanding portions 9. In Figure 4, the fold lines are indicated as dashed lines.

As can be seen in Figure 1, the spacers 6 are long members extending substantially across the width of each lining sheet 3, and gaps are formed between the undersides of the spacers 6 and the lining sheets 3 adjacent the margins 4 and in the troughs between the corrugations 5 immediately adjacent the corrugations 5, to allow water to flow down the length of the lining sheets 3.

As can be seen in Figure 1, the spacers 6 are positioned directly above the purlins 1.

Figures 1 and 2 indicate how the roof cladding can be arranged to provide a rooflight. On the right-hand side of Figure 1, the outer cladding 10 is continued by a transparent or translucent rooflight cladding 21 (shown dashed) and a shaped rooflight edge trim 22 is secured to the spacer 6. As shown in Figure 2, a top trim 23 collects the water running down from the upper lining sheets 3 and conducts the water to the edge trim 2, which in turn conducts the water down the side of the rooflight opening. A bottom trim 24 finishes off the lower side of the rooflight opening.

The following materials may be used in the roof cladding particularly described above: Outer cladding 10 - a rigid material such as steel, aluminium, reinforced cement or plastics material.

Lining sheets 3 - a relatively rigid material such as galvanized steel, aluminium, reinforced cement or plastics material, with or without a painted or coated underside.

Rooflight cladding 21 - any conventional material such as PVC or CRP.

Insulation - glass-fibre quilt, for instance 60 mm or plastics material foam (it should be noted that the insulation 8 may not be essential for all usages).

Cable tray member 17 - a flexible plastics such as PVC, or sheet metal.

WHAT WE CLAIM IS: 1. A roof cladding for a pitched roof, comprising: a corrugated sheet material lining supported by structural support members with the corrugations of the lining running up the roof, spacers positioned directly above respective structural support members, on the top surface of the lining, resting on and supported by troughs of the lining, leaving a gap for water on the lining to flow down the length of the lining; an outer cladding supported by the spacers and thereby spaced above and supported by the lining; and thermal insulation above the lining and below the outer cladding.

2. The roof cladding of Claim 1, wherein the thermal insulation has been placed in position after positioning the spacers on the top surface of the lining.

3. The roof cladding of Claim 1 or 2, wherein the lining is in the form of a plurality of sheets each having raised portions at or adjacent its edges which extend up the

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. is then placed in position on the spacers 6 so that the upstanding portions 9 engage under crowns 11 of the corrugations of the outer cladding 10, the crowns 11 then being directly secured to the upstanding portions 9 of the spacers 6 by self-drilling screws (or any other suitable securing means such as rivets or welding) which, if appropriate, penetrate through the crowns 11. The outer cladding 10 is thus supported by the spacers 6 and thereby spaced above and supported by the lining sheets 3. The roof is then provided with a conventional construction for the ridge 2 of the outer cladding 10, while the ridge of the lining sheets 3 can be formed by a bent lining sheet 3, as indicated in Figure 2.Barge-boards (not shown) can be provided along the gables in a conventional manner, and eaves gutters 12 are provided having their rear walls 13 below the level of the eaves edge of the lining sheet 3 and their front upstands 14 concealing the eaves edge of the roof; a valley gutter could be similarly positioned. Alternatively, in view of the small amounts of water flowing down the sheets 3, drainage could be into the cavity of a double-skin wall cladding. In detail, it will be seen from the left hand side of Figure 1 and from Figure 3 that the margins 4 of the lining sheets 3 may be secured together by any suitable securing means 15. A support for services or cable tray is formed by a member 16 which is of generally inverted T-shape when seen looking up the roof slope (as in Figure 3) and a cover member 17 which clips over and conceals the arms of the T of the member 16 and at the same time closes the gap which is formed between the lowermost parts of adjacent lining sheets 3. The members 16 are spaced apart and can have a fish-hook tag 18 for initial (or permanent) retention and be secured by the securing means 15.Each member 16 can be formed from a blank which had a divided lower half, one part which was bent to the left and the other part of which was bent to the right, as seen in Figure 3spacers 6 can 3. formed of sheet The spacers 6 can be formed of sheet metal, and, as shown in Figure 4, the blank from which the spacer is made can have substantially the same non-rectilinear profile along its top as along its bottom so that a series of such blanks can be cut from a strip of sheet metal. Figure 4 shows that the spacer 6 has a bottom lip 19 which is interrupted at the recesses 7 but extends along a substantial part of the bottom edge of the spacer 6, and top lips 20 on the tops of the upstanding portions 9. In Figure 4, the fold lines are indicated as dashed lines. As can be seen in Figure 1, the spacers 6 are long members extending substantially across the width of each lining sheet 3, and gaps are formed between the undersides of the spacers 6 and the lining sheets 3 adjacent the margins 4 and in the troughs between the corrugations 5 immediately adjacent the corrugations 5, to allow water to flow down the length of the lining sheets 3. As can be seen in Figure 1, the spacers 6 are positioned directly above the purlins 1. Figures 1 and 2 indicate how the roof cladding can be arranged to provide a rooflight. On the right-hand side of Figure 1, the outer cladding 10 is continued by a transparent or translucent rooflight cladding 21 (shown dashed) and a shaped rooflight edge trim 22 is secured to the spacer 6. As shown in Figure 2, a top trim 23 collects the water running down from the upper lining sheets 3 and conducts the water to the edge trim 2, which in turn conducts the water down the side of the rooflight opening. A bottom trim 24 finishes off the lower side of the rooflight opening. The following materials may be used in the roof cladding particularly described above: Outer cladding 10 - a rigid material such as steel, aluminium, reinforced cement or plastics material. Lining sheets 3 - a relatively rigid material such as galvanized steel, aluminium, reinforced cement or plastics material, with or without a painted or coated underside. Rooflight cladding 21 - any conventional material such as PVC or CRP. Insulation - glass-fibre quilt, for instance 60 mm or plastics material foam (it should be noted that the insulation 8 may not be essential for all usages). Cable tray member 17 - a flexible plastics such as PVC, or sheet metal. WHAT WE CLAIM IS:

1. A roof cladding for a pitched roof, comprising: a corrugated sheet material lining supported by structural support members with the corrugations of the lining running up the roof, spacers positioned directly above respective structural support members, on the top surface of the lining, resting on and supported by troughs of the lining, leaving a gap for water on the lining to flow down the length of the lining; an outer cladding supported by the spacers and thereby spaced above and supported by the lining; and thermal insulation above the lining and below the outer cladding.

slope of the roof.

4. The roof cladding of Claim 3 wherein the raised portions are margins along the respective edges of the sheets, and the sheets are secured together side-by-side by securing means which secure the respective upturned margins together.

5. The roof cladding of Claims 3 or 4, wherein the raised portions are upturned margins along the respective edges of the sheets, and supports for services are secured between the respective upturned margins of the lining sheets.

6. The roof cladding of Claim 5, wherein the margins are upturned in such a way as to leave a gap between the lowermost parts of adjacent lining sheets, the gap between at least two lining sheets being substantially closed by a said support.

7. The roof cladding of Claim 6, wherein the support comprises a member which is of generally inverted T-shaped when seen looking up the roof slope, and a cover member which clips over and conceals the arms of the T.

8. The roof cladding of any one of Claims 3 to 7, wherein the spacers extend at least substantially across the width of the lining gaps being provided between the spacers and lining at least adjacent said raised portions of the lining sheets.

9. The roof cladding of any one of the preceding Claims, wherein the spacers comprise long members extending generally at right angles to the slope of the roof and to which tulle outer cladding is directly secured, gaps being provided between the undersides of the spacers and the troughs between the corrugations of the lining.

10. The roof cladding of any one of the preceding Claims, wherein the spacers do not touch the ridges of the corrugations of the lining.

11. The roof cladding of any one of the preceding Claims, wherein the lining is in the form of a plurality of sheets, the sheets having raised portions which run up the slope of the roof, the spacers extending generally at right angles to the slope of the roof and having recesses which accommodate the raised portions of the sheets and locate the sheets at least approximately in correct relationship.

12. The roof cladding of any one of the preceding Claims, wherein the outer cladding is in the form of corrugated sheets with the corrugations running up the slope of the roof, the spacers extending generally at right angles to the slope of the roof and having upstanding portions which are accommodated under the crowns of the corrugations of the outer cladding sheets and locate the sheets at least approximately in correct relationship.

13. The roof cladding of any of the preceding Claims, wherein the outer cladding is corrugated with the corrugations running up the slope of the roof, the spacers having upstanding portions which engage under the crowns of the corrugations and being secured to the outer cladding member under the crowns of the corrugations by securing members which penetrate through the crowns.

14. The roof cladding of Claim 13, wherein each spacer is of sheet metal, having a lip extending along a substantial part of its bottom edge, secured to the lining, and upwardly projecting portions along its top edge engaging under the crowns of the corrugations of the outer cladding, the tops of the upstanding portions having lips secured to the outer cladding.

15. The roof cladding of any one of the preceding Claims, wherein each spacer is of sheet metal, the blank from which the spacer is made having substantially the same non-rectilinear profile along its top as along its bottom, a series of such blanks having been cut from a strip of sheet metal.

16. A building having the roof cladding of any one of the preceding Claims, and means for draining water away from the lower edges of the lining.

17. A method of applying the roof cladding of any one of Claims 1 to 15 to a building, comprising securing the lining to structural support members of the building and subsequently securing the outer cladding to the lining by means of the spacers, using securing means inserted from above.

18. The method of Claim 17, wherein the tray is secured to the structural support members by securing the spacers to the structural support members using securing means which pass through the lining.

19. The method of Claim 18, wherein the roof structure is as in Claims 2 to 12, wherein a thermal insulation is laid over the lining after the spacers have been positioned on the lining, the thermal insulation being punctured where it passes over the upstanding portions of the spacers so that the tops of the upstanding portions of the spacers stick up through the thermal insulation.

20. A roof cladding, substantially as herein described, with reference to, and as shown in, the accompanying drawings.

21. A building, substantially as herein described with reference to, and as shown in, the accompanying drawings.

22. A method of applying a roof cladding, substantially as herein described with reference to, and as shown in, the accompanying drawings.