Roof Plywood Too Short

Plank sheathing usually 1 6 or 1 8 was used as a roof deck before plywood.

Roof plywood too short.

But with the old plywood left in place it will be considerably more difficult to locate the rafters to ensure proper nail. Boards used for sheathing range from those with a 4 inch face to 48 inch long plywood sheets. A structure s roof truss spacing can vary from every 12 to 24 inches. Rafters run from the peak of the roof.

What is plank sheathing. Roofs are framed with rafters or trusses which are rafters joined by internal braces so they install as a single component. 30 years on it s working out fine. The new plywood will have to be nailed to the rafters or roof trusses.

If the plywood thickness is less than or the osb less than 7 16 it is going to be weak with the roof rafters spaced the standard 2 on center. Longer screws would come through the surface of the shingles where the roof could. The minimum plywood for roofing. The number of nails needed for a roof varies on multiple factors such as board face width length and roof truss spacing.

Most of the time this type of repair is unsuccessful because the screws used to secure the plywood are too short.