Required Thickness Of Roof Sheathing

Many code requirements are not inspected.

Required thickness of roof sheathing.

Oriented strand board osb or plywood can be used although plywood will provide higher nail head pull through resistance. And for wood structural panel sheathing r803 2 2 allowable spans. Building codes for roofing reqiure a minimum 1x4 and the spaces between battens should not exceed 3 1 2 inches figure 2 46 wood shingles over spaced sheathing and figure 2 47 wood shakes installed over wood sheathing are illustrated below. Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick.

That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. Sheathing type typically 15 32 inch or thicker panels are required in high wind areas. Spacer type panel edge clips are available from some manufacturers. And if you re still wondering what roof sheathing is and what materials are typically used read on and satisfy your curiosity.

Roof sheathing materials plywood. Roof sheathing panel spacing hints. If you re in search of quotes for a roof sheathing job improvenet can put you in touch with up to four local contractors for free. Sheathing should be a minimum of 19 32 inch thick.

Panel edges shall have approved tongue and groove joints or shall be supported with blocking unless 1 4 inch minimum thickness underlayment or 1 1 2 inches of approved cellular or lightweight concrete is placed over the subfloor or finish floor is 3 4 inch wood strip. Use a 10d box 0 128 inch by 3 inch nail as a spacer to gauge 1 8 inch edge and end spacing between panels. The apa table has a span rating for the sheathing installed with or without h clips and the span rating is the same both ways. 8d ring shank nails should be used instead.

Loads will vary with the. You would go to table r503 2 1 1 1 to determine minimum nominal panel thickness. Never attach roof sheathing with staples. Use panels rated as exposure 1 or better.

Comes in standard 4 by 8 foot sheets is strong.