Timber Roof Construction Details

Timber pitched rooftop construction details focus on the timber construction that is commonly used in most roofing constructions.

Timber roof construction details.

Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls. Trada and approved document part a give guidance on sizes of joists for flat roofs relating to spans and loading. These hip rafters run at a 45 angle from each corner of the building to the ridge. The construction of the flat roof is similar to that of the timber upper floor.

For additional stability you can also use steel joists that are built into one or both of the walls. Common rafters are the main timbers used to build a gable roof and are in almost every hipped roof construction as well facia soffit construction click here for help installing fascia soffit boards that finish the bottom of the rafter feet off neatly and provide something for your gutters to fix to. Boardsmust have a nominal thickness of min. Render on timber frame 2.

Timber in the form of rough sawn or planedboards or planks can be used as the loadbearing deck to a flat roof fig. 3 05 timber frame pitched roof. There are two basic methods of pitched roof construction. Timber is a heavy material that adds strength to your roof but comes at quite the cost.

A cut roof this is the traditional method of cutting the timber on site and building up the roof using rafters ridge boards joists and purlins etc the exact details being determined by the size of roof size of timbers etc. Tile hanging off timber frame 1 8. Timber framed and historic buildings may be framed with principal rafters or timber roof trusses. 24 mm 20 and should have.

Modern timber roofs are mostly framed with pairs of common rafters or prefabricated wooden trusses fastened together with truss connector plates. A disadvantage of the hip roof is that it is more difficult to construct than a gable roof. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. A truss roof using factory made trusses which are delivered to site complete and just erected.

Ventilated batten void warm roof gable 3 06 timber frame timber flat roof 3 07 timber frame timber flat roof with parapet 3 08 timber frame lintel at window head 3 09 timber frame windows and doors jambs and cills specification within an example should 3 10 timber frame ground bearing floor insulation above slab 3 11 timber frame ground bearing floor insulation below slab. Having a manual for warm flat roof construction with details and a summary of rules to follow helps. Timber frame standard details september 09 building 1 grosvenor court hipley street. Timber boarding on timber frame 1 9.

Internal wall to internal wall junctions 3. Type of roof because it is braced by four hip rafters. When constructing a pitched rooftop with timber this can be an incredibly labor intensive build.