How Many Shingles for a 4,000 Square Foot House?
Roofing squares needed
49.2 squares
A 4,000 square foot footprint, 80 by 50, at a 6/12 pitch with ten percent waste.
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How that number is worked out
These are the figures this page was built with and every line the calculator produces from them. Change anything above and all of it moves.
- Building length80 ft
- Building width50 ft
- Roof pitch, rise per 12 in6 /12
- Waste allowance10 %
- Ridge length, 0 if unknown80 ft
Roofing squares needed49.2 squares
| Footprint area | 4,000 sq ft |
|---|---|
| Slope multiplier at 6/12 | 1.12 x |
| Actual roof surface | 4,472 sq ft |
| Squares before waste | 44.7 |
| Squares with 10% waste | 49.2order to this number |
The material list this produces
| Shingles, bundles (3 per square) | 148 |
|---|---|
| Synthetic underlayment, rolls (10 sq each) | 5 |
| Starter strip, linear ft | 300 |
| Ridge cap, linear ft | 80 |
| Drip edge, linear ft | 260 |
| Roofing nails, lb | 108 |
Roof pitch compared
Pitch is the number most people guess at, and it is worth more shingles than any other input. Same house, five pitches.
| Roof pitch | Roofing squares needed |
|---|---|
| 4/12 | 46.4 squares |
| 6/12 | 49.2 squares |
| 8/12 | 52.9 squares |
| 10/12 | 57.3 squares |
| 12/12 | 62.2 squares |
What else matters here
Four thousand square feet of footprint at 6/12 is 4,472 square feet of roof, 49.2 squares with waste, a hundred and forty eight bundles.
At this budget the shingle itself is worth choosing rather than defaulting to. Three tab is a single flat layer with cutouts, the cheapest thing on the shelf, typically rated around twenty to twenty five years and around 60 to 70 miles per hour, and it has nearly disappeared from new residential work.
Architectural, also called laminated or dimensional, bonds a second layer onto the first. It is heavier, carries a much higher wind rating, reads as texture from the street, and is what almost every house gets now. Designer and luxury lines go heavier again to imitate slate or shake, run four or five bundles per square, and cost roughly double. The honest comparison is not the headline warranty term, which almost nothing reaches, but the wind rating, the weight and whether the installer is certified for the system.
What this calculator assumes
- Footprint times the slope multiplier gives the actual roof surface. A 6/12 roof is 11.8 percent larger than the ground it covers, which is the number most people forget.
- Three bundles per square is standard for both three tab and architectural shingles. Check your brand, a few premium lines run four.
- Synthetic underlayment is figured at 10 squares per roll, starter and ridge cap at one linear foot per foot.
Questions people ask
How many bundles of shingles for a 4,000 sq ft house?
About 148 bundles at a 6/12 pitch with ten percent waste, which is 49.2 squares.
What is the difference between three tab and architectural shingles?
Three tab is one flat layer with cutouts. Architectural bonds a second layer on, which makes it heavier, much better rated for wind, and textured rather than flat.
Are designer shingles worth the money?
They imitate slate or shake and run four or five bundles per square at roughly double the cost. Judge them on weight and wind rating rather than the headline warranty term.
The roofing calculator takes any dimensions you like and hands back the same list.