Roofing Nail & Fastener Calculator

Squares or sq ft × 3-tab vs architectural × 4-nail or 6-nail high-wind — plus nail length by decking thickness

Planning / estimating only — starting point, not gospel. Not a permit, not manufacturer instructions. 2018 IRC §R905.2.5 requires asphalt-shingle fasteners to penetrate through the roof sheathing or at least 3/4 in into wood plank decking (ASTM F1667 nails). Manufacturer instructions set 4-nail vs 6-nail patterns and often override the IRC in high-wind zones. Confirm the shingle wrapper, the adopted code, and your AHJ before you order coils. This tool counts field nails from roof surface area; it does not include starter, hip/ridge cap, or valley metal fasteners.
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