Wrap Rolls Needed
2 rolls
Net Area
1,380 sq ft
Tape
1 rolls
Total Cost
$436
2
1,380 sq ft
1 rolls
$436
Inputs
Result
Gross: 160×9 = 1,440 sq ft. Windows: –150. Doors: −60. Gables: 2×(30×5/2) = +150. Net = 1,380 sq ft. +10% = 1,518 sq ft. Rolls: ceil(1,518/900) = 2. Tape: 1. Cap nails: ceil(1,518/200) = 8 boxes.
Inputs
Result
Gross: 120×8 = 960. Windows: −90. Doors: −40. Net = 830 sq ft. +10% = 913 sq ft. Rolls: ceil(913/900) = 2. Tape: 1. Cap nails: ceil(913/200) = 5 boxes.
Calculate your gross wall area (perimeter × wall height), subtract windows (15 sq ft each) and doors (20 sq ft each), add any gable ends, then add 10% for overlap. Divide by 900 sq ft (the coverage of a standard 9×100 ft roll) and round up.
| House Size | Perimeter | Gross Area | Rolls (9×100) |
|---|---|---|---|
| Small (1,200 sq ft) | 140 ft | 1,260 sq ft | 2 rolls |
| Medium (2,000 sq ft) | 180 ft | 1,620 sq ft | 2–3 rolls |
| Large (3,000 sq ft) | 220 ft | 1,980 sq ft | 3 rolls |
House wrap covers the entire wall surface, then you cut out window and door openings from the inside. For windows, make an inverted-Y cut from the center of the opening downward, fold the flaps inward, and secure with flashing tape. Doors get a similar treatment with the bottom cut first.
Horizontal seams need a minimum of 6 inches of overlap, with the upper course overlapping the lower course. Vertical seams need 6 to 12 inches of overlap. At corners, wrap should extend at least 12 inches onto the adjacent wall. Our calculator adds 10% to the net area to account for these overlaps.
Use approximately 1 cap nail or cap staple per square foot of house wrap. Space fasteners every 12 to 18 inches along studs and 6 inches at edges and seams. A standard box of 200 cap nails covers about 200 square feet.
| Fastener Type | Cap Size | Best For | Cost/Box |
|---|---|---|---|
| Plastic cap nail | 1" | New construction | $18/200 |
| Metal cap nail | 3/4" | Repairs, retrofits | $15/200 |
| Hammer tacker staple | 3/8" | Fast installation | $10/5,000 |
Most house wrap manufacturers recommend installing siding within 90 to 120 days (3–4 months) of wrapping. Extended UV exposure degrades the wrap's water resistance and tear strength. Tyvek HomeWrap allows up to 120 days; some generic wraps may only allow 60 days.
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Last Updated: Mar 9, 2026
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