How Long Should My Roofing Nails Be

The screw shank nails.

How long should my roofing nails be.

This is a reasonable guide most of the time. 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. The length of each nail must be a minimum of 1 inches long and for roof overs atlas recommends a nail length of at least 2 inches. In general roofing nails should be long enough to penetrate the wood decking a minimum of 3 4.

More than 1 layer of roofing not recommended over 3 8 sheathing. The rule of thumb with nails. 2 points if you get the pun. The more common roof thickness is 3 4 inch decking.

Is that you should choose a nail that is three times as long as the thickness of the material you are fastening. The one to two inch roofing nails are suitable for most types of roof shingles. If you need bigger nails including pikes you may need to place a special order at the hardware store. Use 1 nails in re roof applications when the old roof has been removed and to use 1 nails when overlaying the old roof.

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. 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.