Timber Pitched Roof Construction Details

A trussed roof will often rest on a timber wall plate as with a conventional one.

Timber pitched roof construction details.

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 traditional method of cutting timber on site and building up the roof using rafters joists purlins ridge. Clay and concrete tiles have retaining nibs on the back of the tile which rest on the wooden lath.

3 05 timber frame pitched roof. Pitched roof timber sizes. The most commonly used types of pitched roof construction are the gable the hip the intersecting and the shed or lean to. Timber pitched rooftop construction details focus on the timber construction that is commonly used in most roofing constructions.

Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls. When constructing a pitched rooftop with timber this can be an incredibly labor intensive build. Trada and approved document part a give guidance on sizes of joists for flat roofs relating to spans and loading. Each truss is lifted into position and fixed to the plate.

Timber is a heavy material that adds strength to your roof but comes at quite the cost. The following tables give details of the allowable spans and spacing for some of the more common timber sizes used in traditional roofing construction. Building a pitched roof prefabricated trusses the latter stages of construction felt battening tiling remain the same regardless of the framing method used. The two basic construction methods of pitched roofs are.

A truss roof using factory made trusses which are delivered to site complete and just erected. Read part 2 pitched roof construction. The construction of the flat roof is similar to that of the timber upper floor. 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.

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.