Timber Roof Detail

Having a manual for warm flat roof construction with details and a summary of rules to follow helps.

Timber roof detail. Below is a sketch of the original roof wall structural details for this building. 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. The building regulations in the uk provide guidance on roof design. Modern timber roofs are mostly framed with pairs of common rafters or prefabricated wooden trusses fastened together with truss connector plates.

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. Parapet detail joists perpendicular 3 13. Roofs tend to be either pitched or flat and typically in residential construction timber is the most common material used.

Dormer in section 3 11. Above these components is a rack of common rafters. 3 05 timber frame pitched roof. There is a hierarchy of timber framing at work here with trusses supporting the ridge and purlin beams.

The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. These hip rafters run at a 45 angle from each corner of the building to the ridge. A disadvantage of the hip roof is that it is more difficult to construct than a gable roof. It is the strongest type of roof because it is braced by four hip rafters.

A timber frame truss roof with ridge beam purlins and common rafters is a stunning combination that creates visual interest and structural complexity. Parapet detail joists parallel details in section 4. Roof panels 3 8 1 roof panel connections 3 9. Timber is a heavy material that adds strength to your roof but comes at quite the cost.

The roof is a key element of the building structure providing protection from the elements and has a vital role in reducing heat loss from the building. Timber framed and historic buildings may be framed with principal rafters or timber roof trusses. The roof sheathing consisted of inch thick wide pine boards nailed to the purlins and thick enough to resist much sagging. The original roof was built using purlins beams extending between gable ends.

Flat roof joist and decking 3 10. 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. The hip roof has four sloping sides. Intersecting the intersecting roof consists of a gable.