How Many Rolls of House Wrap Do You Need?
Enter the walls and the roll size on the label. You'll get rolls to buy after the 6″ course lap and waste — house wrap only, not siding or insulation. Unlike siding, don't subtract windows and doors.
Last updated: August 12, 2026
Perimeter is the outer wall walk-around (all sides). Height is one story or stacked stories — not roof pitch.
Lap defaults to 6″ and waste to 10% (change under Advanced). Don't subtract openings.
House Wrap Order Summary
160 × 9 ft · 9 × 100 ft · 6″ lap · 10% waste · openings not deducted
Worked examples
Ranch walls — 160 × 9
1,440 sq ft · 9×100 rolls · 6″ lap · 10% waste
The package says 900 sq ft, but a 6″ course lap leaves you closer to 850 on the wall. Two rolls cover this ranch once waste is in.
Walls + gables — 2,000 + 200
2,200 sq ft gross · 9×100 · 6″ lap · 10% waste
Add the gable triangles on top of the wall body. Keep windows and doors in the total — wrap still covers those spots before you cut and flash.
Same ranch, 9×150 rolls
1,440 sq ft · 9×150 · 6″ lap · 10% waste
Longer rolls bump effective coverage. You still buy two here, with less leftover than two short 100 ft rolls.
Ordering decisions
The roll math is straightforward. These choices decide whether the buy count matches the job.
Roll width vs story height
9 ft rolls are the usual wall pick. Use 3 ft rolls for tight repairs. Pick a width that puts seams where you can tape them.
Stucco often needs two layers
A lot of stucco specs want two weather-barrier layers. This tool counts one — double the rolls (or run it twice) when your finish needs it.