Timber Flat Roof Construction Details

The flat roof shown above shows warm deck roof construction.

Timber flat roof construction details. It must provide adequate protection against the elements keeping the buildings structure and interior dry. Sizes of joists needed for flat roof construction. A roof is defined in bs 6229 as a flat roof if it has a pitch of 10 degrees or less. Labeling and material symbols also need to be included.

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. A flat roof must be strong durable and stable throughout its lifetime. So any timber joists that are used need to be strong enough to support this weight. Today flat roofs are used by architects for the same reasons that they became a cornerstone of modernist architecture.

The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. That will help you remember certain factors and details to build the best possible flat roof. Trada and approved document part a give guidance on sizes of joists for flat roofs relating to spans and loading. B 4 flat roofs 171 b 4 1 flat roof types 171 b 5 flooring 174 b 5 1 connection details 174 b 5 2 openings 175 b 5 3 ground floor requirements 176 b 5 4 ground floors partitions 177 b 5 5 support of partitions 178 b 6 timber frame 178 b 6 1 component elements 179 b 6 2 accurate setting out 180 b 6 3 insulation details 182.

3 05 timber frame pitched roof. Timber flat roof carports timber flat roof construction timber flat roof construction details timber flat roof deck timber flat roof detail timber flat. Old asbestos roofs are often replaced with flat roofs. 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.

Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls. Having a manual for warm flat roof construction with details and a summary of rules to follow helps. Solid external masonry wall. 215mm aircrete solid wall λ 0 15 w mk render insulation λ 0 022 w mk pitched roof gable.

As you may imagine there is a fair amount of weight involved here in terms of boards felt etc. Flat roof types.