Roof size reference

Roof size for a 2,400 sq ft house

One story: about 27.8–31.7 squares (2,783–3,173 sq ft of roof) at 4/12–8/12. Two stories: about 13.9–15.9 squares over a 1,200 sq ft footprint.

2,400 sq ft ranch, by pitch

Pitch	Roof sq ft	Squares	Bundles*	Ice barrier sq ft
4/12	2,783	27.8	92	755
5/12	2,860	28.6	95	755
6/12	2,952	29.5	98	755
7/12	3,056	30.6	101	755
8/12	3,173	31.7	105	755
9/12	3,300	33	109	755
10/12	3,437	34.4	114	755
12/12	3,734	37.3	124	755

*3/square + 10% waste. Footprint 2,400 + 10% overhang = 2,640 sq ft.

Two stories instead?

A two-story 2,400 sq ft house sits on about 1,200 sq ft, so its roof is 13.9–15.9 squares. That matches a 1,200 sq ft ranch.

Early budget · architectural shingles · our provisional setting

$13,900 – $31,700

2,400 sq ft ranch, 27.8–31.7 squares, Ohio and Michigan. Two-story: $7,000–$15,900.

Get your own range

Winter details for 2,400 sq ft in Ohio or Michigan

Attic vents. With about 2,400 sq ft of attic floor, the IRC R806.2 ratios work out to 2,304 sq in of net free vent area at 1/150 or 1,152 sq in at 1/300, about 576–1,152 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 2,400 sq ft ranch has about 126 ft of eaves. At 6/12 with a 12-inch overhang that is 2 courses (40.2 in up the slope), roughly 755 sq ft of membrane where your local code calls for it.

Frequently asked questions

How many squares is a 2,400 sq ft ranch roof?

About 27.8 to 31.7 squares between 4/12 and 8/12; at 6/12 it is 29.5 squares (2,952 sq ft).

How many bundles for a 2,400 sq ft one-story house?

92–105 bundles at 3 per square with 10% waste; 98 at 6/12.

What about a two-story 2,400 sq ft house?

Its footprint is about 1,200 sq ft, so the roof is roughly 13.9–15.9 squares.

Early budget for a 2,400 sq ft ranch roof?

$13,900–$31,700 for architectural shingles using our provisional $500–$1,000 per square setting, not a quote.