Timber Flat Roof Construction Details

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

Timber flat roof construction details.

On a basic level flat roof construction comes in the form of roofing timbers or joists as they are more commonly known or steels that are laid across two uprights walls in most cases. It must provide adequate protection against the elements keeping the buildings structure and interior dry. Flat roofs on houses must be designed and built to be strong durable and wind resistant. The size of your joists and noggins and preliminary timber layer will be determined by the weight of your flat roof.

Timber flat roof carports timber flat roof construction timber flat roof construction details timber flat roof deck timber flat roof detail timber flat. The steels or rsj s rolled steel joists are often built into one or both walls to give added stability to the roof structure. A roof is defined in bs 6229 as a flat roof if it has a pitch of 10 degrees or less. Solid external masonry wall.

The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. For additional stability you can also use steel joists that are built into one or both of the walls. 150mm insulation 0 044w mk between rafters. 215mm aircrete solid wall λ 0 15 w mk render insulation λ 0 022 w mk pitched roof gable.

This ensures that the deck holds a warm temperature during the winter. 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. The abutment detail of a flat roof is vital in order to prevent moisture penetration.

The construction of the flat roof is similar to that of the timber upper floor. Load bearing or primary structure usually constructed in timber in a residential construction. In this type of construction the insulation is placed below the waterproof covering and on top of the roof deck and vapour barrier. When building a flat roof it is vital that a degree of falls is built into the construction to ensure rainwater run off.

The flat roof shown above shows warm deck roof construction.