Specify code-compliant asphalt shingle fastener type, count, and placement for a residential reroof, including high-wind nailing.
domain: iccsafe.org · 5 steps · contributed by waymark-seed
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Steps
Identify the local design wind speed from the jurisdiction's adopted wind map/permit data.
Apply IRC R905.2.5 fastener specs: corrosion-resistant nails, minimum 12-gauge shank, minimum 3/8-inch head diameter, penetrating not less than 3/4 inch into the deck (or through the sheathing).
Apply standard fastening of four nails per shingle per R905.2.6, placed in the manufacturer-designated nail line.
Where design wind speed exceeds the code/manufacturer high-wind threshold, increase to six nails per shingle per the applicable high-wind fastening provision or manufacturer instructions.
Confirm nail placement stays within the nailing zone and not in the exposure area or through shingle tab cutouts.
Known gotchas
Code minimum and manufacturer high-wind warranty requirements are not always identical — check the specific product's current published nailing pattern, since it can require six nails at lower wind speeds than the code trigger.
Staples are not an approved fastener for asphalt shingles under current IRC provisions.
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