GB2231892A

GB2231892A - Building roofs

Info

Publication number: GB2231892A
Application number: GB9000404A
Authority: GB
Inventors: Jack Kenneth Dixon
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-01-10
Filing date: 1990-01-09
Publication date: 1990-11-28
Also published as: GB9000404D0

Abstract

A roof of a building made up of rectangular metal weathering panels 1 with drainage channels 15 under the panel joints that run along the fall of the roof so that rainwater leaks and water from condensation from the weathering panel fixings above drain via the channels to the outside of the building, brackets 10 supporting the panels and attached thereto (as at 7), the edge of the panels overlying the fixings 8 for the brackets to the underlying structure. <IMAGE>

Description

Improvements relating to sheet metal faced roofs of buildings.

This invention relates to flat or shaped metal sheeted roofs of buildings where the continuous joints between roofing sheets that run along the fall of the roof are provided with a drainage channel below the fixings so that if they leak rainwater will drip into a drainage channel below which also collects condensation from the underside of the metal sheet above, There is a great demand for metal sheeted roofs to have low pitches and existing systems do not perform well in this application. The systems commonly called standing seam roofs at present used on low pitches are inconvenient due to the need for long sheets which extend from eaves to ridge These sheets are difficult to transport and dangerous to handle even in mildly windy conditions. They are subject to interstitial condensation and present problems when openings are required for rooflights etc.

According to this invention a plate or plates which take fixings from the weathering sheets above is provided under butt or overlapping panel joints which run continuously along the fall of the roof so that fixings that secure the plate to the deck are covered by the weathering sheet above and any leakage of the sheet fixings into the fixing plate will drip into continuous drainage channel below, it will also drain any condensation that forms on the fixing plate or the weathering sheet above.

Panel joints that run across the fall of the roof are staggered and may be of a raised type which are easy to make waterproof and the roof panels may be of a size which is easier to manhandle. The panels may be provided with crossfalls so that rainwater flows to the continuous joint running along the fall of the roof.

It is easy to form openings for roof lights by suitably shaping the panels around the opening or providing a hole within the panel.

The invention is now described by way of example FIG 1 shows a plan of a roof showing weathering panels (1) arranged in checkerboard manner with the joint (2) running along the fall of the roof being continuous and the joints (3) running across the fall of the roof being staggered, panels are arched so that rainwater will drain in the direction joint (2) and then run down the roof along panel joint (2) as shown by arrows (4) according to this system almost any obstruction may be easily accommadated for example a rooflight (5) FIG 2 shows section through panel joint (3) which is a raised welted joint made up in known manner or the standing joint may be provided with a capping (22) to include a mastic bead (23) to seal the joint.

FIG 3 shows a section through joint (2) whereby there is provided a shaped metal fixing plate (6) which secures the weathering sheet (1) to the fixing plate (6) with rivets or similar fixings (7) the fixing plate (6) is shaped along its sides so that fixings (8) which secures the fixing plate (6) to a concrete, timber or metal roof deck (9) is covered by the weathering sheet (1), condensation forming above the fixings under the top sheet will drip on to the fixing plate and flow through slots (10) provided in the side vertical walls (11) of the fixing plate (6) into a continuous drainage channel (20) which is suitably drained to the exterior of the building, a recess (12) is formed in the fixing plate to accommadate downward extending flanges (13) provided in the top sheet (1) the joint between the flanges are sealed with mastic or gaskets (14), any leakage is drained into channel (20) which is provided with a plastic lower lining (15) which is continuous so that any rainwater may be drained to the exterior of the building, the ends of the joint (3) is shown in elevation to include a cover (16) which protects the cut end of the sheet, where the panel is substantially flat rigid insulation (17) is provided between top sheet (1), and roof deck (9), this insulation may be bonded to the top sheet to prevent condensation forming on the underside.

FIG 4 shows a section through an alternative joint (2) whereby there is provided a shaped metal fixing plate (6) showing fixings (7) which secure the weathering sheet (1) to the fixing plate (6) the fixing plate (6) is shaped along its sides so that fixings (8) which fixes the fixing plate (6) to the roof deck (9) is covered by the weathering sheet (1) condensation under the top sheet will drip on to the fixing plate and flow through slots (10) provided in the side vertical wall (11) of the fixing plate (6), into a continuous drainage channel (20) formed by providing a corrosponding and continuous plastic lining (15) which is drained to the exterior of the building, the weathering sheets overlap at the fixing plate and sealed with mastic (22), any leakage of rainwater is similarly drained into channel (20) and in turn drains to the exterior of the building, transverse joints, if required, are made in known manner and shown in elevation (3), insulation (17) is provided between top sheet (1), and roof deck (9), the top sheet may be profiled where there are no end laps or where flat, are bonded to the insulation below, this application is more suitable where the weathering panels are continuous from eaves to eaves or ridge of roof to eaves and crossfalls need not be provided.

FIG 5 shows an application of this invention where the weathering sheet needs to take the roof loads, arcuate weathering panels (1) suitable pressed with ribs to provide a rigid load bearing panel are disposed of as shown in FIG 1 with raised joints (3) staggered so that rainwater may drain easily.

The joint (2) between panels is similar to that shown in FIG 1 but in this application the fixing plate (6) also takes the roof loads and transfers them to the deck (9) or on to beams or purlins positioned under the drainage channel (20).

Abstract A roof of a building made up of rectangular metal weathering panels with drainage channels under the panel joints that run along the fall of the roof so that rainwater leaks and water from condensation from the weathering panel fixings above drain via the channels to the outside of the building.

Claims

1) A roof of a building weathered by means of rectangular metal panels whereby the joints between a series of panels running along the slope of the roof are continuous and a metal plate or plates are positioned under this joint and run the full length thereof, the corresponding weathering panel edge margins are fixed into the plate, the plate in turn is fixed into the roof deck in such a manner that the weathering sheet protects the plate fixings from the weather, a channel section is provided below the plate so that any leakage of water from the weathering panel fixings above or condensation forming on the underside of the plate and weathering panels, drains into the continuous channel below the fixing plate and is suitably discharged outside the building.

2) A roof as claimed in (1) whereby a recess is provided along the length of the fixing cleat and the corresponding edges of the weathering sheets are turned downwards and inserted into the recess, a seal is provided between the vertical edges of the weathering sheets to seal the joint.

3) A roof as described in (1) whereby the fixing plate is recessed along its sides to provide fixing area below the weathering sheet, the base of the recess slopes inwardly toward the vertical part of the plate which is provided with slots to allow any condensation forming under the sheet or leaks from rainwater above to drain into the drainage channel below.

4) A roof as in (1) whereby a pressure plate is provided above the adjacent edges of weathering sheets above the fixing plate so that screw fixings from the pressure plate into the fixing plate will, with the addition of mastic or a gasket, provide an effective seal along the joint between panels above the drainage channel.

5) A roof as claimed in (1) whereby the joints between weathering panels that run across the fall of the roof are staggered and are formed in any known manner and whereby the weathering panels are provided with cross falls so that rainwater is directed to the continuous flush joint running along the fall of the roof, where the crossfall joint is raised rainwater will flow down alternate panels crossing the flush joints between adjacent panels.

6) A roof as claimed in (4) whereby a cap filled as necessary with mastic is fitted to the ends of the raised crossfall joint to protect the cut edges of the metal weathering sheet and to seal the end of the joint.

7) A roof substantially as described with reference to the accompanying drawings Amendments to the claims have been filed as follows 1) A roof of a building weathered by means of rectangular metal panels whereby the joints between a series of panels running along the slope of the roof are continuous and a metal plate or plates are positioned under this joint and continuously or discontinuously run the full length thereof, the corresponding weathering panel edge margins are fixed into the plate, the plate in turn is fixed into the roof deck, a channel section is provided below the plate so that any leakage of water from the weathering panel fixings above or condensation forming on the underside of the plate and weathering panels, drains into a continuous channel below the fixing plate and is suitably discharged outside the building.