Standard Roof Sheathing Size

For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended.

Standard roof sheathing size.

That s considered to be the minimum. Never attach roof sheathing with staples. And if you re still wondering what roof sheathing is and what materials are typically used read on and satisfy your curiosity. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick.

The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. Comes in standard 4 by 8 foot sheets is strong. This minimum will only work if the rafters are set 16 inches apart at most and if the roof doesn t have too much load. Before lumber companies began selling osb the standard choice for sheathing a roof with a 24 inch rafter spacing was 1 2 inch cdx plywood the letters cdx indicate that it is construction grade.

8d ring shank nails should be used instead. The typical thickness range for sheathing is 3 8 to 3 4 inch. Where a 1 2 sheet butts up against a 3 8 sheet the 3 8 side can have several strips of roofing felt narrow on the bottom then progressively wider applied to ease the transition before the base layer of felt is applied to the whole roof. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

Sheathing should be a minimum of 19 32 inch thick.