2015 Residential Code for Asphalt Shingle fasteners

The 2015 International Residential Code (R905.2.5) lists requirements for nails used to fasten asphalt shingles to the roof.  The nails must be galvanized steel, stainless steel, aluminum or copper.  The shank shall be a minimum of 12-gage.  The nail head must have a minimum diameter of 3/8” and comply with ASTM F1667.

There is no length given in the code, however; the nail must be long enough to pass through all roofing materials and penetrate a minimum of ¾” into the roof sheathing.  If the roof sheathing is less than ¾”, then the roofing nails must pass through the sheathing.

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