Minimum Roofing Nail Length

The international building code requires that roofing nails have a minimum 12 gauge shank and a 3 8 inch diameter head.

Minimum roofing nail length.

Minimum 2 3 8 inch nail length. Nails with round heads and the following minimum dimensions. The more common roof thickness is 3 4 inch decking. Pick out stainless steel or hot dipped galvanized nails size 6d 1 1 2 inch long siding nails and 2 inch long siding nails in the quantity you need for your project.

A large nail head and heavier shank gauge provide greater holding power. For example galvanized by various processes aluminium copper or stainless steel. Ring shank to extend a minimum of 1 1 2 inches from the tip of the nail. If the hardiplank is being installed on a building in a humid climate or near the ocean or any large body of water the stainless steel nails are the first choice.

However where the roof deck is less than three fourths of an inch thick the nail should be long enough to penetrate fully and extend at least one eighth of an inch through the roof deck. Nails of the proper length should penetrate three fourths of an inch into the roof deck. 16 to 20 rings per inch. Roofing nail should have a barbed shank until the head which eliminates nail pops blow offs and roof leaks.

For all owens corning shingles roofing nails should penetrate into the wood deck by a minimum of inch or completely through the roof deck by a minimum of 1 8 inch. 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. When nailing shingles proper penetration into the roof deck is essential to ensure the nail and shingle remain secure. Galvanized steel aluminum or copper roofing nails minimum 12 gage 0 105 in 3 mm shank with minimum 3 8 in 10 mm diameter head astm f 1667 of a length to penetrate through the roofing materials and a minimum of in 19 mm into the roof sheathing.

More than 1 layer of roofing not recommended over 3 8 sheathing. A minimum 0 280 inch full round head diameter. When installing asphalt shingles on felt only to any grade decking you should use 1 inch long roofing nails. A roofing nail should have a minimum nominal shank diameter of 12 gauge 2 67 mm and a minimum head diameter of 9 5 mm.

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.