Florida Roof Sheathing Thickness

While ring shank nails are still required the nail size depends on the sheathing thickness.

Florida roof sheathing thickness.

Fasteners shall comply with astm f1667. Specifies the minimum sheathing thickness for framing spaced 24 inches on center based on exposure category and wind speed. The cap nail shank shall be not less than 0 083 inch for ring shank cap nails and 0 091 inch for smooth shank cap nails. The typical thickness range for sheathing is 3 8 to 3 4 inch.

Roof sheathing thickness unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. Allowable spans for lumber floor and roof sheathing a b for si. Minimum thickness of the outside edge of plastic caps shall be 0 035 inch. The bottom layer shall be 18 inches 457 mm and the top layer a minimum of 36 inches 914 mm wide.

Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. The requirement became effective on october 1 2007. Cap nail shank shall have a length sufficient to penetrate through the roof sheathing or not less than 3 4 inch into the roof sheathing. 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.

Sheathing should be a minimum of 19 32 inch thick. An excerpt of table r803 2 2 is shown in the next column. Where the roof sheathing is less than 3 4 inch 19 1 mm thick the nails shall penetrate through the sheathing. If it was originally secured using staples or 6d nails it must be completely re nailed to the new standard.

1 inch 25 4 mm. 8d ring shank nails should be used instead. Where the sheathing thickness is 15 32 inches and less roof. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

That s considered to be the minimum. Never attach roof sheathing with staples. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.