Standard Roof Construction Uk

British roofing standards regulations.

Standard roof construction uk.

A breathable membrane or in older properties roofing felt also sometimes called sarking felt or slaters felt which keeps the rain out whilst the roof is being built and offers secondary protection to any water that gets through the outside layer of the roof. 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. Information on pitched roof construction including roof materials. Wooden joists to support the weight of the roof.

The british standard for tilling and slating provides specific guidance about double lapped slating where calculations and recommendations for pitch and lap of slate are based on. A pitched or sloping roof has a pitch of at least 15 but often much more. A cut roof. This part is well known as slope in geometry tangent function or stair construction in trigonometry.

The steels or rsj s rolled steel joists are often built into one or both walls to give added stability to the roof structure. The building roofing regulations require materials and workmanship to be fit for purpose and to meet a minimum standard for roofing. Pitched roofs examples of pitched roofs. The minimum standard is that bs 5534 must be met and construction design and management cdm regulations now apply to domestic re roofing which put health and safety obligations on the contractor.

The united states still uses imperial units of measurement and framing members are typically spaced sixteen or twenty four inches apart. In the uk a concrete tiled roof would normally have rafters at 600 mm 24 in centers roof battens at 300 mm 12 in centers and ceiling joists at 400 mm 16 in centers. In simple terms this type of roof consists of rafters and joists. A typical roof pitch in the uk for a traditional house will be 40 50 but at the extreme can go up to 70 above 70 would actually be called a wall.

The roof pitch is described by the vertical rise divided by horizontal span. Understanding the roof construction of any new build or refurbishment is essential to determine what products are required for the job. 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. Current day building regulations require detailed calculation of the stresses timber size etc used in roof construction so factory made trusses are becoming the standard practice where all this can be worked out on a computer.

A truss roof using factory made trusses which are delivered to site complete and just erected. Slating and tiling for pitched roofs and vertical cladding code of practice including shingles this roofing standard provides recommendations for the design materials application installation and performance of slates tiles shingles and shakes as well as the associated fittings and accessories used in the construction of pitched roofs.