Houses with a 2,400 square foot roof
A 2,400 square foot roof covers a one-story house of about 2,000 square feet, or a two-story house of nearly 4,000. On many houses this size, part of the roof is over an attached two-car garage.
The ridge, drip edge and vent numbers below are for that one-story house: about 54 by 36 feet, under a 6 in 12 roof with 12 inch overhangs.
Shingle order for a 2,400 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 | 80 | $3,599 |
| Squares | 24 on the roof, 26.4 to order | |
| Underlayment, #15 felt | 7 rolls | $245 |
| Roofing nails | About 6,759 | Not priced |
| Total | About $3,844 |
2,640 square feet with the waste is 26.4 squares, so 26.4 × 3 = 79.2, rounded up to 80 bundles, and 2,640 ÷ 400 = 6.6, 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 80 bundles is 1 full pallet plus 24 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 83 bundles instead of 80.
| Waste | Squares to order | Bundles | Architectural shingles | Three-tab shingles |
|---|---|---|---|---|
| None | 24 | 72 | $3,239 | $3,095 |
| 10%, simple gable roof | 26.4 | 80 | $3,599 | $3,439 |
| 15%, hips and valleys | 27.6 | 83 | $3,734 | $3,568 |
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 106.
Underlayment and nails for 2,400 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 6,759 at 4 a shingle, or 10,138 at 6 for high wind; three-tab takes 8,448 or 12,672.
Ridge cap and drip edge on a 2,400 square foot roof
These go by length, not area. On the 54 by 36 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 | 56 ft | None | 3 | $225 | 198 ft |
| Hip | 18 ft | 114 ft | 7 | $525 | 189 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 2,400 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 1,883 square inches over the 1,962 square foot house above. It is 942 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 2,400 square feet your roof or your floor?
This page is for 2,400 square feet of sloped roof. A roof is bigger than the floor under it, so the table works both ways.
| Roof pitch | Ground a 2,400 sq ft roof covers | Roof over a 2,400 sq ft floor | Bundles for that roof |
|---|---|---|---|
| 4 in 12 | 2,277 sq ft | 2,745 sq ft | 91 |
| 6 in 12 | 2,147 sq ft | 2,911 sq ft | 97 |
| 8 in 12 | 1,997 sq ft | 3,130 sq ft | 104 |
| 10 in 12 | 1,844 sq ft | 3,390 sq ft | 112 |
| 12 in 12 | 1,697 sq ft | 3,683 sq ft | 122 |
The floor column is a one-story house one and a half times as long as it is wide, with 12 inch overhangs. With 2,400 square feet of floor and a 6 in 12 roof, the roof is about 2,911 square feet and takes 97 bundles, 17 more than the list above. On a two-story house with 1,200 square feet a level, it is about 1,504 square feet and 50 bundles. The roof area calculator measures your own.
What a 2,400 square foot shingle roof costs
Shingles and felt come to about $3,844, or $3,684 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 $9,600 to $28,800 here, plus $2,400 to $12,000 for the tear-off. Put your own quotes in the roof replacement cost calculator.
The job at 2,400 square feet
On a house with a garage wing, measure each part of the roof on its own: the main house, the garage, and any porch. Each is a rectangle or a few triangles in plan, and the roof area calculator works each one out from its size and pitch. Adding them up beats guessing from the floor plan.
Before you order
Where a garage roof meets a house wall, the joint needs step flashing, one piece for each course of shingles. Check whether the quote includes new flashing there, around the chimney and at any skylights, or reuses the old.
Other roof sizes
The next size down, 2,200 square feet, takes 73 bundles. The next size up, 2,500 square feet, takes 83 bundles.
1,000 sq ft1,200 sq ft1,500 sq ft1,600 sq ft1,800 sq ft2,000 sq ft2,200 sq ft2,500 sq ft3,000 sq ft3,500 sq ft4,000 sq ft
Common questions
How many bundles of shingles do I need for a 2,400 square foot roof?
80 bundles at 3 a square with 10 percent waste, or 83 with 15 percent for hips and valleys.
How much do shingles cost for a 2,400 square foot roof?
About $3,844 for architectural shingles and felt, or $3,684 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 2,400 square foot roof?
About 3 on a plain gable over a 54 by 36 foot house, with a 56 foot ridge, or 7 as a hip roof, with 133 feet of ridge and hips. Measure yours and enter it in the calculator.
How much step flashing does a garage wing need?
One piece for each course of shingles along the wall. At the 5 7/8 inch exposure IKO gives for its Cambridge shingles, that is about 2 pieces for every foot of sloped wall joint.
How do I measure a roof with a garage wing?
Split it into simple parts: the main roof, the garage roof, and any porch roof. Measure each one's length, width and pitch, work out each area, and add them. The roof area calculator does each part for you.
How many bundles of shingles do I need for a 2,400 square foot house?
About 97 with 10 percent waste for a one-story house, because 2,400 square feet of floor under a 6 in 12 roof with 12 inch overhangs has about 2,911 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.