Standing seam trays are not self supporting and require a fully or almost fully supporting substrate against which they rest.
Timber cladding flat roof detail.
Details on plan 1.
Membrane edge fixed timber roof element hose clip pipe collar.
Having a manual for warm flat roof construction with details and a summary of rules to follow helps.
As such it should be highly durable and tear resistant in accordance with type 1 membranes in bs4016.
Flat roof detail masonry cavity wall flat roof insulation above and between joists.
The definition of a flat roof according to bs 6229 is having a pitch less than 10 o to the horizontal however some in the industry would consider up to 15 o as their definition of a flat roof.
Separating wall junctions 1 4.
Render on timber frame.
The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls.
Assuming that the cladding will always be subject to some penetration of moisture a separate protective membrane will be necessary behind the cladding largely protected from wind rain and daylight by the cladding itself.
Parapet detail masonry cavity wall flat roof with parapet insulation above joists.
Timber frame flat roof detail.
Tile hanging off timber frame 1 8.
Design of timber cladding details.
Following on from our introduction to standing seam zinc roofing design the team at elzinc look at three typical roof build ups for standing seam zinc roof construction don t forget to subscribe to receive the other posts in this series.
Detail design timber cladding basic principles in principle any timber cladding should be designed as a rainscreen.
That will help you remember certain factors and details to build the best possible flat roof.
The inner wall structure should be fitted with a breather membrane this serves to seal the building against damp and weather penetration.
When building a flat roof it is vital that a degree of falls is built into the construction to ensure rainwater run off.
Timber frame flat roof detail.
Supporting the zinc roof.
Non loadbearing wall junctions 1 5.
Where a pitched roof abuts the wall at an angle.
Where a flat or pitched roof over an enclosed area abuts a wall or a balcony abuts a wall cavity trays should be linked to the flashing to prevent water penetrating into an enclosed area.
Timber boarding on timber frame 1 9.
Horizontal flashings should provide weathering to a minimum of 75mm above the intersection with the roof.
Others would treat even steeper pitches as flat roofs.
Horizontal timber cladding is probably the most common and perhaps simpler option.
Flat roof joist and decking 3 10.
Vertical timber cladding can come in the form of tongue and groove or board on board along with open joint options too.
