Flat Roof Timber Frame Construction

So any timber joists that are used need to be strong enough to support this weight.

Flat roof timber frame construction.

As you may imagine there is a fair amount of weight involved here in terms of boards felt etc. Having a manual for warm flat roof construction with details and a summary of rules to follow helps. The fall of the roof is achieved by using firring pieces with a fall of 1 in 40. When building a flat roof it is vital that a degree of falls is built into the construction to ensure rainwater run off.

It s been a couple of long days working solo to get it all up but it s rewarding stuff se. For additional stability you can also use steel joists that are built into one or both of the walls. 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. The flat roof shown above shows warm deck roof construction.

Others would treat even steeper pitches as flat roofs. Old asbestos roofs are often replaced with flat roofs. Roofs tend to be either pitched or flat and typically in residential construction timber is the most common material used. The ceiling joists are used as the platform for the roof coverings.

In this type of construction the insulation is placed below the waterproof covering and on top of the roof deck and vapour barrier. Finally feel like we are slowly getting back to an actual building. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls.