Timber Cladding Flat Roof Detail

Non loadbearing wall junctions 1 5.

Timber cladding flat roof detail.

Design of timber cladding details. Render on timber frame. Parapet detail masonry cavity wall flat roof with parapet insulation above joists. 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.

Vertical timber cladding can come in the form of tongue and groove or board on board along with open joint options too. 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. Membrane edge fixed timber roof element hose clip pipe collar.

Flat roof joist and decking 3 10. Parapet detail masonry cavity wall flat roof with parapet insulation above joists. Details on plan 1. It dealt in detail with flat roof constructions and can be regarded as one of the first guidelines for such roofs fig.

Flat roof detail masonry cavity wall flat roof insulation above and between joists. Horizontal flashings should provide weathering to a minimum of 75mm above the intersection with the roof. Standing seam trays are not self supporting and require a fully or almost fully supporting substrate against which they rest. 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.

Timber frame flat roof detail. Where a pitched roof abuts the wall at an angle. The boards are nailed to vertical battens on the substrate this could be masonry timber frame etc. That will help you remember certain factors and details to build the best possible flat roof.

Supporting the zinc roof. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. Others would treat even steeper pitches as flat roofs. Tile hanging off timber frame 1 8.

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. As such it should be highly durable and tear resistant in accordance with type 1 membranes in bs4016. Separating wall junctions 1 4. Detail design timber cladding basic principles in principle any timber cladding should be designed as a rainscreen.

Horizontal timber cladding is probably the most common and perhaps simpler option. 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.