Timber Roof Detail

There is a hierarchy of timber framing at work here with trusses supporting the ridge and purlin beams.

Timber roof detail.

Dormer in section 3 11. Having a manual for warm flat roof construction with details and a summary of rules to follow helps. A timber frame truss roof with ridge beam purlins and common rafters is a stunning combination that creates visual interest and structural complexity. 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.

It is the strongest type of roof because it is braced by four hip rafters. 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. Above these components is a rack of common rafters.

Intersecting the intersecting roof consists of a gable. Modern timber roofs are mostly framed with pairs of common rafters or prefabricated wooden trusses fastened together with truss connector plates. Timber is a heavy material that adds strength to your roof but comes at quite the cost. The original roof was built using purlins beams extending between gable ends.

The hip roof has four sloping sides. A disadvantage of the hip roof is that it is more difficult to construct than a gable roof. Below is a sketch of the original roof wall structural details for this building. When constructing a pitched rooftop with timber this can be an incredibly labor intensive build.

Parapet detail joists parallel details in section 4. 3 05 timber frame pitched roof. Intermediate floor joist parallel 4 3. Flat roof joist and decking 3 10.

For additional stability you can also use steel joists that are built into one or both of the walls. The building regulations in the uk provide guidance on roof design. Timber pitched rooftop construction details focus on the timber construction that is commonly used in most roofing constructions. Parapet detail joists perpendicular 3 13.

The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two 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. These hip rafters run at a 45 angle from each corner of the building to the ridge. Roofs tend to be either pitched or flat and typically in residential construction timber is the most common material used.