Roof size reference

Roof size for a 3,000 sq ft house

One story: about 34.8–39.7 squares (3,479–3,966 sq ft of roof) at 4/12–8/12. Two stories: about 17.4–19.8 squares over a 1,500 sq ft footprint.

3,000 sq ft ranch, by pitch

Pitch	Roof sq ft	Squares	Bundles*	Ice barrier sq ft
4/12	3,479	34.8	115	844
5/12	3,575	35.8	118	844
6/12	3,690	36.9	122	844
7/12	3,820	38.2	127	844
8/12	3,966	39.7	131	844
9/12	4,125	41.3	137	844
10/12	4,296	43	142	844
12/12	4,667	46.7	155	844

*3/square + 10% waste. Footprint 3,000 + 10% overhang = 3,300 sq ft.

Two stories instead?

A two-story 3,000 sq ft house sits on about 1,500 sq ft, so its roof is 17.4–19.8 squares. That matches a 1,500 sq ft ranch.

Early budget · architectural shingles · our provisional setting

$17,400 – $39,700

3,000 sq ft ranch, 34.8–39.7 squares, Ohio and Michigan. Two-story: $8,700–$19,800.

Get your own range

Winter details for 3,000 sq ft in Ohio or Michigan

Attic vents. With about 3,000 sq ft of attic floor, the IRC R806.2 ratios work out to 2,880 sq in of net free vent area at 1/150 or 1,440 sq in at 1/300, about 720–1,440 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 3,000 sq ft ranch has about 141 ft of eaves. At 6/12 with a 12-inch overhang that is 2 courses (40.2 in up the slope), roughly 844 sq ft of membrane where your local code calls for it.

Frequently asked questions

How many squares is a 3,000 sq ft ranch roof?

About 34.8 to 39.7 squares between 4/12 and 8/12; at 6/12 it is 36.9 squares (3,690 sq ft).

How many bundles for a 3,000 sq ft one-story house?

115–132 bundles at 3 per square with 10% waste; 122 at 6/12.

What about a two-story 3,000 sq ft house?

Its footprint is about 1,500 sq ft, so the roof is roughly 17.4–19.8 squares.

Early budget for a 3,000 sq ft ranch roof?

$17,400–$39,700 for architectural shingles using our provisional $500–$1,000 per square setting, not a quote.