Roof To Wall Framing Detail

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.

Roof to wall framing detail.

In a rafter roof all of these components are required to provide a stable roof. The function of each component is. Needed to tie the roof together where the rafters are framed at an angle to each other. Exterior wall parapet rafters prep.

While most home builders will outsource the construction of roofing trusses the rafter supports of the roof itself learning to frame a roof yourself is one of the true arts of carpentry and a basic primer is covered below. Other firestopping requires 2 inch lumber or two thicknesses of 1 inch lumber with staggered joints or one thickness of inch plywood with joints backed by 1 inch lumber or inch plywood. At roof to wall intersections see figure 1. To wall sloped roof no overhang ledger support.

This will keep weather out prevent lifting in high winds and provide a neat fin ished appearance. In buildings including residential structures framing systems typically consist of the roof structure that supports the roof. Most simply use a nominal 6 piece of lumber. Collar ties rafter ties tension beams structural ridge beams.

The rise or height of the roof at its peak is the altitude of the triangle. Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape. Because most roof flashing is required to extend up the wall a minimum of 4 and some a minimum of 5. Sills and plates normally provide adequate firestopping in walls and partitions.

The roof flashing is then placed up behind this through the wall z bar flashing on the outside of the vertical blocking backing material. The run or half the building span is the base of the triangle. Deck exterior and interior load bearing walls beams girders posts and floor framing. Rafters act more like the top chord of a roof truss than as a roof joist.

At the gable edge use a gable or sidewall flashing. To provide a drip edge allow an overhang of 1 to 2 inches at the eave. Framing a roof is the last step in framing new construction. Use step flashing that has a 2 to 4 inch longer vertical leg than normal.

Do not seal housewrap or building paper to step flashing. Some of these can support the roof and prevent ridge sagging and wall spreading. The trim and roofing sheet should be fastened every 12 to 24 inches along the gable edge. This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings including definitions of collar ties rafter ties and structural ridge beams.

The rafters carry the applied loads to the exterior walls.