Flat Roof Timber Frame Construction

Sizes of joists needed for flat roof construction.

Flat roof timber frame construction.

Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls. The construction of the flat roof is similar to that of the timber upper floor. Having a manual for warm flat roof construction with details and a summary of rules to follow helps. As you may imagine there is a fair amount of weight involved here in terms of boards felt etc.

Timber has been the traditional material for building roofs as far back as early saxon times and beyond. A cavity closer should be provided to the top of the walls to prevent fire spread and to stop damp air entering the roof space. So any timber joists that are used need to be strong enough to support this weight. Framing materials are usually wood engineered wood or structural steel the alternative to framed construction is generally called mass wall construction where horizontal layers of stacked materials such as log building masonry rammed earth adobe etc.

It is still the roof material of choice for housebuilders and self builders irrespective of whether they are building in traditional or contemporary styles or whether they are creating pitched or flat roofs. Timber roof designing buildings wiki share your construction industry knowledge. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two 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.

Framing in construction is the fitting together of pieces to give a structure support and shape. Are used without framing. When building a flat roof it is vital that a degree of falls is built into the construction to ensure rainwater run off. Where a new flat roof abuts an existing external wall the joists can be hung on metal joist hangers which are fixed to a horizontal timber plate wall bolted to the wall.

Others would treat even steeper pitches as flat roofs. For additional stability you can also use steel joists that are built into one or both of the walls. Timber flat roof carports timber flat roof construction timber flat roof construction details timber flat roof deck timber flat roof detail timber flat.