Roofing Nail Count by Wind Zone
Field fasteners for an asphalt-shingle roof, where the wind zone drives the nailing pattern.
Example
You enter
- Roof area (squares) 30
- Shingles per square (~80 three-tab, ~64 architectural) 80
- Nails per shingle (4 standard, 6 high-wind) 6
- Nails per pound 140
You get
- Nails to order 14400
- Nail weight 102.9 lb
Details, formula, and sources
nails = squares x shingles-per-square x nails-per-shingle; weight = nails / nails-per-pound. A 30-square roof at 80 shingles per square, six-nailed for high wind, takes 14,400 nails - about 103 lb of 1-1/4 in roofing nails, half again the standard four-nail pattern (9,600 nails, 69 lb). The manufacturer and wind zone set the pattern; eaves and rakes get six regardless.
nails_total = squares x shingles_per_square x nails_per_shingle; nail_weight_lb = nails_total / nails_per_lb.
Roofing fastener-count identity by name (nails from squares x shingles x pattern; weight from nails / nails-per-pound); first-principles count arithmetic.
The fastener count is public quantity arithmetic; the nailing pattern comes from the IRC wind zone and the shingle manufacturer.
Estimate. AHJ and licensed professional govern.
Field names used by the API: squares, shingles_per_square, nails_per_shingle, nails_per_lb, nails_total, nail_weight_lb
- Nailing pattern 4 nails/shingle standard, 6 on steep/high-wind roofs and at eaves/rakes; the wind zone governsIRC / shingle manufacturer
- Shingles per square ~80 for three-tab, ~64 for many architectural shingles; the product governsshingle manufacturer