How Long Should Roofing Nails Be

Roofing nails should be long enough to penetrate the roofing material and go 19 mm into osb solid wood plywood or non veneer wood decking or through thickness of decking whichever is less.

How long should roofing nails be.

Nails of the proper length should penetrate three fourths of an inch into the roof deck. Use 1 nails in re roof applications when the old roof has been removed and to use 1 nails when overlaying the old roof. More than 1 layer of roofing not recommended over 3 8 sheathing. 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.

When nailing very thin materials into wood a minimum of 1 2 of penetration is necessary. If you want to hold 1 2 drywall to a stud wall the length of the nails should be at least 1 1 2. The thickness of the nail is directly proportional to its length thus the longer the nail the bigger its size. In general roofing nails should be long enough to penetrate the wood decking a minimum of 3 4.

When installing asphalt shingles on felt only to any grade decking you should use 1 inch long roofing nails. 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. Roofing nails range from one to six inches in length.