Houses with a 2,500 square foot roof
A 2,500 square foot roof covers a one-story house of about 2,050 square feet, or a two-story house of about 4,100. A big ranch house has long eaves, and long eaves are where ice dams form in cold climates.
The ridge, drip edge and vent numbers below are for that one-story house: about 55 by 37 feet, under a 6 in 12 roof with 12 inch overhangs.
Shingle order for a 2,500 square foot roof
With 10 percent waste, architectural shingles at 3 bundles a square, #15 felt and 4 nails a shingle:
| Item | Quantity | Cost |
|---|---|---|
| Shingle bundles, architectural | 83 | $3,734 |
| Squares | 25 on the roof, 27.5 to order | |
| Underlayment, #15 felt | 7 rolls | $245 |
| Roofing nails | About 7,040 | Not priced |
| Total | About $3,979 |
2,750 square feet with the waste is 27.5 squares, so 27.5 × 3 = 82.5, rounded up to 83 bundles, and 2,750 ÷ 400 = 6.88, rounded up to 7 rolls of felt. Prices: $44.99 a bundle and $34.99 a roll. The starting prices come from the store listings and cost guides under Sources, last checked in October 2026. Prices vary by region and season, so change any price to match your store or your quote.
IKO packs its Cambridge architectural shingles 56 bundles to a pallet, so 83 bundles is 1 full pallet plus 27 bundles. Other makers pack differently.
How waste and shingle type change the order
Ten percent waste suits a simple gable roof. With hips and valleys, plan on about 15 percent, which makes this order 87 bundles instead of 83.
| Waste | Squares to order | Bundles | Architectural shingles | Three-tab shingles |
|---|---|---|---|---|
| None | 25 | 75 | $3,374 | $3,224 |
| 10%, simple gable roof | 27.5 | 83 | $3,734 | $3,568 |
| 15%, hips and valleys | 28.75 | 87 | $3,914 | $3,740 |
Three-tab shingles also come 3 bundles to a square, so the count holds and only the price changes. Shingles packed 4 bundles to a square would take 110.
Underlayment and nails for 2,500 square feet
7 rolls of #15 felt ($245), 14 rolls of #30 felt ($490) or 3 rolls of synthetic ($273). From 2 in 12 up to 4 in 12, the code wants a double layer, about 14 rolls of #15 felt. Nails: about 7,040 at 4 a shingle, or 10,560 at 6 for high wind; three-tab takes 8,800 or 13,200.
Ridge cap and drip edge on a 2,500 square foot roof
These go by length, not area. On the 55 by 37 foot house above, a gable roof has one long ridge; a hip roof has a short ridge and four hips that need cap too.
| Roof shape | Ridge | Hips | Cap bundles, 20 ft each | Cap cost | Drip edge |
|---|---|---|---|---|---|
| Gable | 57 ft | None | 3 | $225 | 202 ft |
| Hip | 18 ft | 117 ft | 7 | $525 | 193 ft |
Cap is $74.99 a bundle. The code wants drip edge on every eave and rake, lapped 2 inches, so buy a little extra.
Attic vents under 2,500 square feet of roof
The code sizes attic vents by the floor under them: 1 square foot of open vent for every 150 of attic, which is 1,965 square inches over the 2,047 square foot house above. It is 983 if 40 to 50 percent of the vents sit within 3 feet of the ridge and the rest low, plus a ceiling vapor retarder in climate zones 6 to 8. Check the net free area printed on each vent's box.
Is 2,500 square feet your roof or your floor?
This page is for 2,500 square feet of sloped roof. A roof is bigger than the floor under it, so the table works both ways.
| Roof pitch | Ground a 2,500 sq ft roof covers | Roof over a 2,500 sq ft floor | Bundles for that roof |
|---|---|---|---|
| 4 in 12 | 2,372 sq ft | 2,855 sq ft | 95 |
| 6 in 12 | 2,236 sq ft | 3,028 sq ft | 100 |
| 8 in 12 | 2,080 sq ft | 3,255 sq ft | 108 |
| 10 in 12 | 1,921 sq ft | 3,525 sq ft | 117 |
| 12 in 12 | 1,768 sq ft | 3,830 sq ft | 127 |
The floor column is a one-story house one and a half times as long as it is wide, with 12 inch overhangs. With 2,500 square feet of floor and a 6 in 12 roof, the roof is about 3,028 square feet and takes 100 bundles, 17 more than the list above. On a two-story house with 1,250 square feet a level, it is about 1,563 square feet and 52 bundles. The roof area calculator measures your own.
What a 2,500 square foot shingle roof costs
Shingles and felt come to about $3,979, or $3,813 with three-tab, before nails, cap, drip edge, flashing, vents, delivery and tax. Installed, HomeAdvisor puts an asphalt shingle roof at $4 to $12 per square foot, which is $10,000 to $30,000 here, plus $2,500 to $12,500 for the tear-off. The 2,500 square foot roof cost page breaks that down.
The job at 2,500 square feet
Where the building department says ice forming along the eaves is a problem, the code wants an ice barrier from the eave edge to at least 24 inches inside the outside wall, on every roof surface. On a long, low house, that is a lot of eave, and the ice barrier is a line of its own on the bill.
Before you order
Ask your building department whether your area needs an ice barrier, and add it to the order if it does. It goes in place of the felt along the eaves, so the felt order drops a little and the ice barrier order goes up.
Other roof sizes
The next size down, 2,400 square feet, takes 80 bundles. The next size up, 3,000 square feet, takes 99 bundles.
1,000 sq ft1,200 sq ft1,500 sq ft1,600 sq ft1,800 sq ft2,000 sq ft2,200 sq ft2,400 sq ft3,000 sq ft3,500 sq ft4,000 sq ft
Common questions
How many bundles of shingles do I need for a 2,500 square foot roof?
83 bundles at 3 a square with 10 percent waste, or 87 with 15 percent for hips and valleys.
How much do shingles cost for a 2,500 square foot roof?
About $3,979 for architectural shingles and felt, or $3,813 with three-tab, at store prices checked in October 2026. Nails, flashing, ridge cap and labor are extra.
How many bundles of ridge cap do I need for a 2,500 square foot roof?
About 3 on a plain gable over a 55 by 37 foot house, with a 57 foot ridge, or 7 as a hip roof, with 135 feet of ridge and hips. Measure yours and enter it in the calculator.
Do I need ice and water shield on a 2,500 square foot roof?
Only where the local code says ice dams are a risk. There, the code (IRC R905.1.2) wants an ice barrier from the eave edge to at least 24 inches inside the outside wall. On roofs of 8 in 12 or steeper, it also has to reach at least 36 inches up the slope.
How many squares is a 2,500 square foot roof?
25 squares. With 10 percent waste you order 27.5 squares, which is 83 bundles at 3 bundles a square.
How many bundles of shingles do I need for a 2,500 square foot house?
About 100 with 10 percent waste for a one-story house, because 2,500 square feet of floor under a 6 in 12 roof with 12 inch overhangs has about 3,028 square feet of roof. A steeper roof takes more.
Tools for this job
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- Chalk line. Snaps straight lines so every row of shingles stays even.
- Roofing hatchet. Drives roofing nails and has a gauge that sets how much of each shingle shows.
- Hook blades for a utility knife. Cut shingles from the top without slicing what is underneath.
- Flat pry bar. Lifts old shingles and pulls nails.
- Roof safety harness kit. Ties you to an anchor on the roof so a slip does not turn into a fall.
Sources
- International Residential Code 2021, Chapter 9: roof drainage (R903) and roof coverings (R905)
- GAF Timberline HDZ specifications (architectural shingles)
- GAF Royal Sovereign specifications (three-tab shingles)
- McCoy's Building Supply: roof shingle prices
- McCoy's Building Supply: roofing underlayment prices
- McCoy's Building Supply: GAF TimberTex hip and ridge cap shingles
- International Residential Code 2021, Chapter 8: attic ventilation (R806)
- IKO Cambridge technical data sheet (architectural shingles, bundles per pallet)
- HomeAdvisor: shingle roof replacement cost, with removal of the old roof
Facts on this page were last checked against these sources in October 2026.