Timber Roof Construction Details

3 05 timber frame pitched roof.

Timber roof construction details.

There are two basic methods of pitched roof construction. Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls. 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. Type of roof because it is braced by four hip rafters.

These hip rafters run at a 45 angle from each corner of the building to the ridge. 150mm insulation 0 044w mk between rafters. Timber framed and historic buildings may be framed with principal rafters or timber roof trusses. Internal wall to internal wall junctions 3.

Intersecting the intersecting roof consists of a gable and valley or hip and valley. The valley is formed where the two. 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. When constructing a pitched rooftop with timber this can be an incredibly labor intensive build.

215mm aircrete solid wall λ 0 15 w mk render insulation λ 0 022 w mk pitched roof gable. Render on timber frame 2. Trada and approved document part a give guidance on sizes of joists for flat roofs relating to spans and loading. The construction of the flat roof is similar to that of the timber upper floor.

Timber is a heavy material that adds strength to your roof but comes at quite the cost. Boardsmust have a nominal thickness of min. A truss roof using factory made trusses which are delivered to site complete and just erected. Timber in the form of rough sawn or planedboards or planks can be used as the loadbearing deck to a flat roof fig.

24 mm 20 and should have. Timber pitched rooftop construction details focus on the timber construction that is commonly used in most roofing constructions. Tank stand and walkway 3 3. Tile hanging off timber frame 1 8.

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. Modern timber roofs are mostly framed with pairs of common rafters or prefabricated wooden trusses fastened together with truss connector plates. Solid external masonry wall.