Timber Pitched Roof Construction Details

A traditional method of cutting timber on site and building up the roof using rafters joists purlins ridge.

Timber pitched roof construction details.

Prefabricated trusses which are delivered to site and erected. Building a pitched roof prefabricated trusses the latter stages of construction felt battening tiling remain the same regardless of the framing method used. The following tables give details of the allowable spans and spacing for some of the more common timber sizes used in traditional roofing construction. Read part 2 pitched roof construction.

The two basic construction methods of pitched roofs are. Timber pitched rooftop construction details focus on the timber construction that is commonly used in most roofing constructions. Pitched roof timber sizes. The construction of the flat roof is similar to that of the timber upper floor.

There are two basic methods of pitched roof construction. Pitched roof detail the way that the tile is held on the roof differs slightly according to the material used. A truss roof using factory made trusses which are delivered to site complete and just erected. Timber is a heavy material that adds strength to your roof but comes at quite the cost.

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. A trussed roof will often rest on a timber wall plate as with a conventional one. Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls. An example of each is shown in figure 2 1.

3 05 timber frame pitched roof. The most commonly used types of pitched roof construction are the gable the hip the intersecting and the shed or lean to. Roofs with pitches of 10 to 20 are often called low pitched roofs and special considerations need to be made particularly on the overlap between tiles to avoid water being blown into the roof by the wind. When constructing a pitched rooftop with timber this can be an incredibly labor intensive build.

Each truss is lifted into position and fixed to the plate.