Timber Flat Roof Construction Details

For additional stability you can also use steel joists that are built into one or both of the walls.

Timber flat roof construction details.

24 mm 20 and should have. Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls. Trada and approved document part a give guidance on sizes of joists for flat roofs relating to spans and loading. A flat roof must be strong durable and stable throughout its lifetime.

Boardsmust have a nominal thickness of min. Timber trusses also are built in a variety of styles using wood or metal joints. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. Applying a liquid waterproofing agent will often add a few more years to the roof.

Heavy timber rafters typically spaced 240 cm 8 ft to 370 cm 12 ft apart are called principal rafters. If your flat roof is beginning to resemble a patchwork quilt then it s time to consider a more extensive treatment with your timber flat roof construction details. Timber in the form of rough sawn or planedboards or planks can be used as the loadbearing deck to a flat roof fig. The construction of the flat roof is similar to that of the timber upper floor.

A roof is defined in bs 6229 as a flat roof if it has a pitch of 10 degrees or less. Others would treat even steeper pitches as flat roofs. 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.

When building a flat roof it is vital that a degree of falls is built into the construction to ensure rainwater run off. Timber flat roof carports timber flat roof construction timber flat roof construction details timber flat roof deck timber flat roof detail timber flat. They are designed by the manufacturer for each specific building. The definition of a flat roof according to bs 6229 is having a pitch less than 10 o to the horizontal however some in the industry would consider up to 15 o as their definition of a flat roof.

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. Having a manual for warm flat roof construction with details and a summary of rules to follow helps. Pre manufactured roof trusses come in a wide variety of styles.