Flat Roof Rafter Detail

Plywood or osb is the most common materials used for the roof sheathing.

Flat roof rafter detail.

Having a manual for warm flat roof construction with details and a summary of rules to follow helps. The flat roof design detail can go up against different style that when nitty gritty right can ooze a cutting edge feel. Definition of hip rafter. They are nailed securely to exterior wall plates and to each other.

A rafter that runs diagonally between the roof ridge and the top of the wall plate forming a hipped roof. Notice that the hip rafter forms what amounts to a descending ridge a single line that starts at the top of the roof and descends to the wall top plate at a wall corner. Asphalt shingle can be installed on a pitch of 2 over 12 or greater. That will help you remember certain factors and details to build the best possible flat roof.

The pitch of the roof determines the roofing material you can use. The rafters in a flat roof serve as ceiling joists for the space below. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. The size of rafters for a flat roof depends on the horizontal span of the building the type and grade of timber used and the load on the roof.

It must meet the local codes for thickness at least 3 8 which is also based on the rafter or truss spacing.