Timber Flat Roof Construction Details Uk

Sizes of joists needed for flat roof construction.

Timber flat roof construction details uk. Further information on specific waterproofing systems may be obtained from bs 8217 reinforced bitumen membranes for roofing code of practice the flat roofing. You can find the building regulations here. By way of metal flat roof joist hangers. Covers pitched roof materials basic pitched roof designs cold and warm pitched roofs and pitched roof construction.

A flat roof must be strong durable and stable throughout its lifetime. Wherever possible joists should span the shortest distance of the roof plan. They tend to be variants on flat roofing using curved timber glulam beams under a plywood covering. Paying careful attention to.

Covers pitched roof detail. This appendix contains common details for flat roofs and balconies. It must provide adequate protection against the elements keeping the buildings structure and interior dry. Timber flat roof construction usually consists of structural joists topped with a decking of plywood or a similar sheet material.

A roof is defined in bs 6229 as a flat roof if it has a pitch of 10 degrees or less. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. Part 4 flat roof construction. Old asbestos roofs are often replaced with flat roofs.

Additional construction details drawings as well as the small selection of foundation wall floor and roof construction detail drawings shown here many of the building notes have a related construction detail drawing with specific dimensions eg rafter sizes spans insulations types for purchase with the building specifications. The following sketches show examples of typical common construction details and illustrate general principles. Roof building is one of the more complex aspects of site carpentry and is a highly skilled job as the timbers are cut on site and erected one at a time it is both relatively slow and relatively expensive. The pitch is governed by the roof covering and the required rate of rainwater discharge.

So any timber joists that are used need to be strong enough to support this weight. Part 2 pitched roof construction. Covers flat roof materials and flat. This article covers all manner of flat roofing venting methods and details on how to build a flat garage roof and how to frame a flat roof and also encompasses flat roofs roof decking roof coverings including flat roof felt how to prevent leaks at abutments timber flat roof construction details and parapets and common.

As you may imagine there is a fair amount of weight involved here in terms of boards felt etc. Roof ridges and ridge tiles roof hips and hip tiles roof valleys roof verges and lead flashings. Roofs tend to be either pitched or flat and typically in residential construction timber is the most common material used. The building regulations in the uk provide guidance on roof design.

That will help you remember certain factors and details to build the best possible flat roof. Using timber wall plates.