How this house wrap calculator works
Wall area is increased for overlaps and waste, then divided by coverage per roll.
How to use it
- Exterior wall area. Enter the value in sq ft.
- Coverage per roll. Enter the value in sq ft.
- Overlap/waste allowance. Enter the value in %.
- Request the result. Add your email, then select “Email & show my result.”
What to do with the number
Corners, openings, laps and detailing increase material beyond net wall area. Use actual roll dimensions and the overlap instructions for the selected weather-resistive barrier.
Planning estimate
Use this result as a starting point, not a guarantee. Product specifications, site conditions, manufacturer guidance, local codes, taxes, labor, tolerances, and rounding can change the real requirement or cost.