Roof size reference
Roof size for a 2,500 sq ft house
One story: about 29–33.1 squares (2,899–3,305 sq ft of roof) at 4/12–8/12. Two stories: about 14.5–16.5 squares over a 1,250 sq ft footprint.
2,500 sq ft ranch, by pitch
| Pitch | Roof sq ft | Squares | Bundles* | Ice barrier sq ft |
|---|---|---|---|---|
| 4/12 | 2,899 | 29 | 96 | 771 |
| 5/12 | 2,979 | 29.8 | 99 | 771 |
| 6/12 | 3,075 | 30.8 | 102 | 771 |
| 7/12 | 3,184 | 31.8 | 106 | 771 |
| 8/12 | 3,305 | 33.1 | 110 | 771 |
| 9/12 | 3,438 | 34.4 | 114 | 771 |
| 10/12 | 3,580 | 35.8 | 119 | 771 |
| 12/12 | 3,889 | 38.9 | 129 | 771 |
*3/square + 10% waste. Footprint 2,500 + 10% overhang = 2,750 sq ft.
Two stories instead?
A two-story 2,500 sq ft house sits on about 1,250 sq ft, so its roof is 14.5–16.5 squares.
Early budget · architectural shingles · our provisional setting
$14,500 – $33,100
2,500 sq ft ranch, 29–33.1 squares, Ohio and Michigan. Two-story: $7,300–$16,500.
Winter details for 2,500 sq ft in Ohio or Michigan
Attic vents. With about 2,500 sq ft of attic floor, the IRC R806.2 ratios work out to 2,400 sq in of net free vent area at 1/150 or 1,200 sq in at 1/300, about 600–1,200 sq in of it at the soffits. That balance keeps the deck cold and cuts ice dams.
Eave ice barrier. Assuming a rectangle 1.5 times as long as wide, a 2,500 sq ft ranch has about 128 ft of eaves. At 6/12 with a 12-inch overhang that is 2 courses (40.2 in up the slope), roughly 771 sq ft of membrane where your local code calls for it.
Frequently asked questions
How many squares is a 2,500 sq ft ranch roof?
About 29 to 33.1 squares between 4/12 and 8/12; at 6/12 it is 30.8 squares (3,075 sq ft).
How many bundles for a 2,500 sq ft one-story house?
96–110 bundles at 3 per square with 10% waste; 102 at 6/12.
What about a two-story 2,500 sq ft house?
Its footprint is about 1,250 sq ft, so the roof is roughly 14.5–16.5 squares.
Early budget for a 2,500 sq ft ranch roof?
$14,500–$33,100 for architectural shingles using our provisional $500–$1,000 per square setting, not a quote.