Standard Roof Sheathing Size

3 8 apa rated sheathing is typically rated for a 24 span distance between rafters in a roof.

Standard roof sheathing size.

Never attach roof sheathing with staples. Roof sheathing materials plywood. 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. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick.

For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. The typical thickness range for sheathing is 3 8 to 3 4 inch. 8d ring shank nails should be used instead. That s considered to be the minimum.

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. Sheathing should be a minimum of 19 32 inch thick. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. And if you re still wondering what roof sheathing is and what materials are typically used read on and satisfy your curiosity.

The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that.