How Long Should My Roofing Nails Be

For reroofing shingle over shingle or hip and ridge application it is necessary to use minimum 35 mm long roofing nails.

How long should my roofing nails be.

Nail spacing for sheets of osb and plywood is 8 inches per nail. 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. More than 1 layer of roofing not recommended over 3 8 sheathing. This means that you ll need to use six nails per each truss that runs under the sheathing because each sheet measures 4 feet wide by 8 feet long.

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. Nails of the proper length should penetrate three fourths of an inch into the roof deck. 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.

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.