How Long Should My Roofing Nails Be

4 feet equals 48 inches which you then divide by 8 to determine that you ll need six nails where the board comes in contact with a truss.

How long should my roofing nails be.

Wood shakes minimum 3 4 sheathing wood shakes nail type minimum length 18 straight split 5d box 1 3 4 18 and 24 handsplit and resawn 6d box 2. More than 1 layer of roofing not recommended over 3 8 sheathing. For reroofing shingle over shingle or hip and ridge application it is necessary to use minimum 35 mm long roofing nails. When installing asphalt shingles on felt only to any grade decking you should use 1 inch long roofing nails.

Use 1 nails in re roof applications when the old roof has been removed and to use 1 nails when overlaying the old roof. The more common roof thickness is 3 4 inch decking. Nail spacing for sheets of osb and plywood is 8 inches per nail. We have to use 30 mm long nails if we are installing thicker shingles like the laminated shingles cambridge xpress or cambridge xtreme 9 5.

In general roofing nails should be long enough to penetrate the wood decking a minimum of 3 4.