How many bundles of shingles per square: 3 for most, up to 6
Three bundles make a square for most asphalt shingles, both the flat 3-tab kind and the laminated architectural kind. GAF’s bundles per square explainer, dated August 24, 2026, defines a square as 100 square feet of roof and says some specialty shingles “may require up to five bundles per square due to their added weight”. Some go past five. Owens Corning’s January 2026 Woodcrest and Woodmoor data sheet counts 6 bundles to a square, so a 3-bundle guess would buy you half a roof.
Check your shingle’s own number. It’s on the data sheet, or as square feet per bundle on the wrapper.
Shingle by shingle, from the maker sheets
The area column is our own check: shingles per square times width times exposure (the part of each shingle left showing), divided by 144 to get square feet. We opened every source on October 14, 2026.
| Shingle | Size and exposure | Shingles per square | Bundles per square | Area covered (our math) | Source |
|---|---|---|---|---|---|
| GAF Royal Sovereign (3-tab) | 12 x 36 in (English size), 5 in | 79 | 3 | 98.75 sq ft | GAF product page |
| GAF Timberline HDZ | 13 1/4 x 39 3/8 in, 5 5/8 in | 64 | 3 | 98.4 sq ft | GAF product page |
| Owens Corning TruDefinition Duration Designer Colors | 13 1/4 x 39 3/8 in, 5 5/8 in | 64 | 3 | 98.4 sq ft | Owens Corning spec sheet, 2016, hosted by Lowe’s |
| CertainTeed Landmark | 13 1/4 x 38 3/4 in, 5 5/8 in | 66 | 3 | 99.9 sq ft | CertainTeed data sheet, March 2023; bundles from Lowe’s listing (33.33 sq ft a bundle) |
| GAF Slateline | 17 x 40 in, 7 1/2 in | 48 | 3 | 100.0 sq ft | GAF data sheet |
| GAF Camelot II | 17 x 34 1/2 in, 7 1/2 in | 56 | 4 | 100.6 sq ft | GAF data sheet |
| GAF Woodland | 17 x 40 in, 6 1/2 in | 56 | 4 | 101.1 sq ft | GAF data sheet |
| IKO Armourshake | not listed | not listed | 5 | not listed | IKO coverage table (20 sq ft a bundle) |
| Owens Corning Woodcrest | 14 1/4 x 40 in, 4 in | 90 | 6 | 100.0 sq ft | Owens Corning data sheet, January 2026 (Denver plant) |
Slateline breaks the pattern. GAF’s Slateline page calls it a designer shingle, yet it packs 3 to a square like the plain ones. So “designer” tells you nothing about the count. The sheet’s own bundle figure does.
Woodcrest’s sheet doesn’t say why it comes in 6 bundles, but the piece count shows how it adds up. Only 4 inches of each shingle show per course, so 90 pieces fill a square, and the sheet spreads them over 6 bundles. On weight, CertainTeed’s Landmark sheet gives even that standard 3-bundle shingle about 217 to 229 lb a square, depending on the plant that made it. By our math that’s 72 to 76 lb a bundle, before anything heavier.
Three bundles cover 98.4 square feet on some sheets
GAF lists 64 Timberline HDZ shingles per square. At that size and exposure, 64 of them cover 98.4 square feet. Owens Corning prints the same 98.4 on its Duration sheet. IKO is the bluntest: its table gives the Marathon Plus AR 3-tab 32.3 square feet a bundle and calls a square “3 Bundles + 2 Shingles.”
Retail listings round it off. Home Depot’s Timberline HDZ listing says 33.33 square feet per bundle. Our roofing calculator makes the same assumption, a full 100 square feet for every 3 bundles.
It’s small. On a big roof it’s still a bundle, though. The calculator opens on a 50 by 30 foot house with a 1 foot overhang and a 6/12 pitch, which is 2,046 square feet of shingling once 10% waste is in.
| Coverage per bundle | Bundles for 2,046 sq ft |
|---|---|
| 33.33 sq ft (a full 100 per square) | 62 |
| 32.8 sq ft (98.4 per square) | 63 |
| 32.3 sq ft (IKO Marathon Plus AR) | 64 |
By our math, 98.4 instead of 100 is a 1.6% shortfall, and GAF’s explainer tells you to add “10-15%” for trim and waste anyway. So keep the waste at 10% or more.
Ordering Camelot II or Woodcrest at 3 a square
The bigger mistake is using 3 per square for a shingle that needs more. Same house, same 20.5 squares with waste:
Order Camelot II at the usual 3 a square and you’re 20 bundles short. Woodcrest would leave you 61 short, about half of what the roof needs.
You don’t need the catalog. Get the exact product name from your quote and find “Bundles/Square” on its data sheet, or read the square feet per bundle on the wrapper and divide 100 by it.
Starter and ridge cap come separately
Starter strips and ridge caps come in their own bundles, and their sheets give coverage in running feet, not squares. GAF’s numbers for its own:
- WeatherBlocker Premium starter: “100 linear ft.” per bundle as half sheets, 50 as full sheets. The sheet says it “Installs at the eaves and rakes.”
- Seal-A-Ridge ridge cap: “4 bundles cover 100 linear feet,” so 25 feet a bundle.
Give the example house a plain gable roof. The ridge runs 52 feet (50 plus the overhang at each end), which is 3 bundles of Seal-A-Ridge. The two eaves add up to 104 feet. By our math, each of the four rakes, the sloped edges, runs about 17.9 feet: half the 32 foot depth, times the 1.118 pitch factor for 6/12. That’s 175.6 feet of edge in all, so 2 bundles of starter as half sheets. GAF’s Seal-A-Ridge sheet covers “hips and ridges,” so on a hip roof add every hip to the ridge. Measure those too.
The roofing calculator takes your footprint, overhang and pitch. Set “Bundles per square” to your shingle’s number and it counts the bundles, waste included. If the house is L-shaped with one pitch all round, total the flat area of each section, overhangs included, in the square footage calculator, multiply by the pitch factor from the roofing calculator’s table, and enter the result in its “I know the roof area” mode.