Cut Roofs

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

In simple terms this type of roof consists of rafters and joists. The joists prevent the outward spread of the rafters/walls, and conveniently give support for the ceiling below.

The size of rafter timbers will depend upon their length from the wall plate to the ridge, the type of roof covering and whether purlins are incorporated in the roof. It is more economical to keep the cross section of the rafters down, however where an open roof space is needed, larger rafters will be necessary.