Timber Flat Roof Detail Section

Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls.

Timber flat roof detail section. Trada and approved document part a give guidance on sizes of joists for flat roofs relating to spans and loading. 3 05 timber frame pitched roof. Dormer in section 3 11. Parapet detail joists parallel details in section 4.

Underneath the basics flat roofs are usually constructed with a ceiling nailed to joists which support a deck usually wood in residential construction a vapor barrier insulation and a roof board. Flat roof joist and decking 3 10. 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.

Timber in the form of rough sawn or planedboards or planks can be used as the loadbearing deck to a flat roof fig. Intermediate floor joist parallel 4 3. This ethylene propylene diene monomer rubber covering is very versatile long lasting and very strong. Parapet detail joists perpendicular 3 13.

Boardsmust have a nominal thickness of min. 24 mm 20 and should have. Having a manual for warm flat roof construction with details and a summary of rules to follow helps. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls.

From there the flat roof system you choose will determine the materials you apply. Dormer in perspective view 3 12. This flat roof covering can be roofing felt usually 3 layers with a mineral chipping topping to soak up the heat of the sun which protects the felt from both melting and breakdown under uv rays. Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 694 kb 167 kb mc01a single layer underlayment 678 kb 302 kb mc01b double layer underlayment 711 kb 322 kb mc02 vent pipe flashing 626 kb 349 kb mc03 valley.

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. Today flat roofs are used by architects for the same reasons that they became a cornerstone of modernist architecture.