House Wrap Calculator

Calculate house wrap for exterior wall coverage.

WRAP
HOUSE WRAP NEEDED
— sq ft
exterior walls

Usage Tip

Overlap horizontal seams 6 in minimum, vertical seams 12 in. Tape all seams and around windows.

THE MATH
Need = Area × (1 + overlap÷96) × (1 + waste)
Where: a roll covers 9 ft × 100 ft = 900 sq ft
• Overlap horizontal seams 6 in, vertical 12 in
• Tape all seams and around windows
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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.