Roof Sheathing Patters

It spans the rafters to support the roofing and in the case of panel sheathing such as plywood or osb it acts as a diaphragm with the walls to resist horizontal loads.

Roof sheathing patters.

Roof and wall sheathing 8 10d every 4 6 on the seams and 8 12 in the field shingles six roofing nails or staples per shingle. Cover sheathing with shingle underlayment felt to minimize roof sheathing exposure to weather unless otherwise recommended by sheathing manufacturer. Blocking of unsupported edges may be required near gables ridges and eaves follow design drawings. Roof sheathing attaches to the surface of the rafters or trusses to form the structural skin of the roof.

And scroll down to see more details on each with installation hints and tips below. Tab shingles need two nails on each side of the tab. Ventilate the roof according to current building codes step 3. The ability of a roof sheathing panel to resist high winds is directly related to how well it is secured to the roof framing.

Use panels no smaller than 4 feet long. The type and number of fasteners required for a specific application is obviously an the engineered wood association apa. Use shingle underlayment felt conforming to astm d226 type i astm d4869 type i or astm d6757 self adhering polymer modified bitumen sheet underlayment should conform to astm d1970 or check roofing manufacturer s. Properly fasten panels including fastening and spacing hints step 4.