If it was originally secured using staples or 6d nails it must be completely re nailed to the new standard.
Florida roof sheathing thickness.
The roof sheathing plywood or osb has to be be nailed with 8d eight penny ring shank round head nails at six inches on center.
Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7.
That s considered to be the minimum.
An excerpt of table r803 2 2 is shown in the next column.
Where the sheathing thickness is 15 32 inches and less roof.
Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.
Never attach roof sheathing with staples.
Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.
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.
Where the roof sheathing is less than 3 4 inch 19 1 mm thick the nails shall penetrate through the sheathing.
Fasteners shall comply with astm f1667.
Minimum thickness of the outside edge of plastic caps shall be 0 035 inch.
Sheathing should be a minimum of 19 32 inch thick.
Roof sheathing thickness unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick.
1 inch 25 4 mm.
The bottom layer shall be 18 inches 457 mm and the top layer a minimum of 36 inches 914 mm wide.
Allowable spans for lumber floor and roof sheathing a b for si.
The requirement became effective on october 1 2007.
Fasteners for asphalt shingles shall be galvanized stainless steel aluminum or copper roofing nails minimum 12 gage 0 105 inch 2 67 mm shank with a minimum 3 8 inch diameter 9 5 mm head of a length to penetrate through the roofing materials and a minimum of 3 4 inch 19 1 mm into the roof sheathing.
For closed valleys valley lining of one ply of smooth roll roofing complying with astm d 6380 classsand atleast36 inches 914 mm wide or valley lining as described in item 1 or 2 above shall be permitted.
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.
Specifies the minimum sheathing thickness for framing spaced 24 inches on center based on exposure category and wind speed.
While ring shank nails are still required the nail size depends on the sheathing thickness.
