Dormer windows require their own mini roofs and great care must be given to their detailing and construction.
Traditional cut roof.
A truss roof using factory made trusses which are delivered to site complete and just erected.
They span from the wallplate to the ridge board providing a platform for the underlay battens and tiles.
Building with them is known as stick framing.
This reflects the weatherproofing requirements of older roofing materials like thatch and peg tiles.
Traditional or cut roof.
The traditional option is steeply pitched rarely less than 35.
The finished structure is readily adaptable.
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.
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.
The timbers are often 400mm or so centres and vary in size according to span.
Not only is the volume large enough to convert into living space but the structure can generally be easily altered.
This means that each rafter is built on the job site using dimensional lumber.
A roof truss consists of one or more triangular units constructed of straight pieces that are connected at the ends by joints.
Every piece is measured cut and fastened together to form the rafter.
Our modern design software allows the roof trusses to be designed for virtually any roof shape.
Rafters are the traditional means of framing a roof.
The roof can be cut in the traditional way or fabricated from mono trusses.
The flexibility of roof trusses is undoubtedly what sets them apart from other methods of construction in this area.
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 overall construction of a traditional cut roof is to ensure that the load of the roof is evenly transmitted to the walls below.
