Traditional Cut Roof

Dormer windows require their own mini roofs and great care must be given to their detailing and construction.

Traditional cut roof.

Traditional or cut roofs usually comprise a series of sloping timbers rafters fixed to a wall plate at their feet and a ridge board or possibly a wall plate at their head. The roof can be cut in the traditional way or fabricated from mono trusses. The finished structure is readily adaptable. A cut roof this is the traditional method of cutting the timber on site and building up the roof using rafters ridge boards joists and purlins etc the exact details being determined by the size of roof size of timbers etc.

As we have briefly mentioned above the birdsmouth joint is mainly used in forming traditional cut roofs to ensure that the rafters or joists that form the roof sit securely on top of the supporting wall plate. 50mm wide by 75mm 100mm or 125mm deep are all. The timbers are often 400mm or so centres and vary in size according to span. Birdsmouth joint as used in the construction of traditional roofs close up of a birdsmouth joint.

Traditional or cut roof the traditional option is steeply pitched rarely less than 35. This reflects the weatherproofing requirements of older roofing materials like thatch and peg tiles. Our modern design software allows the roof trusses to be designed for virtually any roof shape. Prefabricated trussed rafters also have distinct advantages over traditional cut roofs by being able to clear greater spans without the need for additional supports.

The flexibility of roof trusses is undoubtedly what sets them apart from other methods of construction in this area. A truss roof using factory made trusses which are delivered to site complete and just erected.