Timber Flat Roof Design

Sizes of joists needed for flat roof construction.

Timber flat roof design.

So any timber joists that are used need to be strong enough to support this weight. Flat roof with no permanent access and altitude not exceeding 100m 0 75 kn m udl 0 9 kn point load most areas exceeding 100m but not exceeding 200m excluding parts of scotland pennines north east england refer to bs 6399 3 1 kn m udl 0 9 kn point load. May 9 2017 explore bernice ohene s board flat roof construction on pinterest. Some observers suggest it s harder to replace a flat roof than a traditional pitched shingle roof because of the labor required to remove its layers especially on older flat roofs.

See more ideas about flat roof roof roof construction. There are two types of flat roof system and they differ according to whether the insulation is above or below the structural roof deck. This includes structural joists to hold up a roof deck usually of timber boarding a suitable membrane to reduce the risk of condensation and a layer of insulation to keep the warmth in. For additional stability you can also use steel joists that are built into one or both of the walls.

The building regulations in the uk provide guidance on roof design. Today flat roofs are used by architects for the same reasons that they became a cornerstone of modernist architecture. Flat roofs are hard to replace. Old asbestos roofs are often replaced with flat roofs.

The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. But now flat roofs often are constructed with fewer layers because of improved waterproofing technology. 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.

Contemporary designers frequently aim to produce the same clear and simplified forms that appeared at the beginning of the 20th century but are now free to use a wide range of new materials and construction techniques that reflect present day technology. This could mean flat roofs may not raise the same red flags they used to.