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.

The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. 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. Boardsmust have a nominal thickness of min. Parapet detail joists perpendicular 3 13.

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. 3 05 timber frame pitched roof. Parapet detail joists parallel details in section 4. Timber in the form of rough sawn or planedboards or planks can be used as the loadbearing deck to a flat roof fig.

The flat roof covering can also be epdm. 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. From there the flat roof system you choose will determine the materials you apply. Dormer in perspective view 3 12.

The construction of the flat roof is similar to that of the timber upper floor. 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. 24 mm 20 and should have. Having a manual for warm flat roof construction with details and a summary of rules to follow helps.

Intermediate floor joist parallel 4 3. For additional stability you can also use steel joists that are built into one or both of the walls. Dormer in section 3 11. Roof panels 3 8 1 roof panel connections 3 9.

Trada and approved document part a give guidance on sizes of joists for flat roofs relating to spans and loading. Today flat roofs are used by architects for the same reasons that they became a cornerstone of modernist architecture.