How Many Shingles for a 1,500 Sq Ft Roof?
Quick Answer
A 1,500 square foot roof requires 15 roofing squares, which equals 45 bundles of standard 3-tab shingles or 60 bundles of premium architectural shingles.
- 15 roofing squares (1 square = 100 sq ft)
- 45 bundles of 3-tab shingles (3 bundles per square)
- 60 bundles of premium shingles (4 bundles per square)
- Add 10–15% waste: order 50–52 bundles (3-tab) or 66–69 bundles (premium)
Formula
Divide total roof area by 100 to get roofing squares. Multiply squares by 3 for standard shingles or by 4 for premium architectural.
Step-by-Step Calculation
- 1
Calculate roofing squares
1,500 ÷ 100 = 15 squares
- 2
3-tab bundles needed
15 × 3 = 45 bundles
- 3
Add 15% waste
45 × 1.15 = 51.75 → order 52 bundles
- 4
Estimate underlayment
15 squares ÷ 4 (rolls per 4 squares) = 4 rolls of 15-lb felt
Shingle Requirements by Roof Size
| Roof Size | Squares | 3-Tab Bundles* | Arch. Bundles* | Shingle Cost** |
|---|---|---|---|---|
| 1,000 sq ft | 10 | 35 | 44 | $1,050–$2,200 |
| 1,500 sq ft | 15 | 52 | 66 | $1,560–$3,300 |
| 2,000 sq ft | 20 | 69 | 88 | $2,070–$4,400 |
| 2,500 sq ft | 25 | 87 | 110 | $2,600–$5,500 |
| 3,000 sq ft | 30 | 104 | 132 | $3,120–$6,600 |
*Includes 15% waste factor. **Materials only: $30–$50/bundle (3-tab) or $35–$65/bundle (architectural).
Pro Tips
- A 1,500 sq ft roof area does not mean 1,500 sq ft of ground floor — roof area includes slope factor. A 6/12 pitch adds 12% to the ground footprint. Verify your actual roof area before ordering to avoid expensive surplus or a mid-job shortage.
- For 15 squares, buy a full pallet (42 bundles typically covers 14 squares). Pallet pricing saves $2–$5 per bundle versus buying individually, and you have extra bundles for waste and future storm repairs.
- Plan your delivery for the morning of installation day — shingles left on the roof in summer heat for more than 2–3 days can thermally bond to each other in the bundle, making them difficult to separate and install.
- At 15 squares, a two-person crew can complete the job in 2–3 days for a straightforward gable roof. Add one day per 5 valleys, dormers, or complex hip sections — these areas triple the labor per square foot.
Key Cost Factors
- Material cost for 1,500 sq ft: 3-tab shingles at $25–$35 per bundle × 52 bundles (with 15% waste) = $1,300–$1,820. Architectural shingles at $35–$50 per bundle × 69 bundles = $2,415–$3,450. The architectural upgrade costs about $1,000 more but adds 15–20 years of lifespan.
- Professional installation runs $3.50–$5.50 per sq ft ($5,250–$8,250 for 1,500 sq ft) including tear-off, underlayment, flashing, and ridge vents. If you have only one existing layer and it is in decent shape, a roof-over saves $1,500–$2,500 in tear-off costs but check local code — many areas limit you to two layers.
Common Mistakes to Avoid
- Confusing floor area with roof area. A 1,500 sq ft house does not have a 1,500 sq ft roof — pitch adds 15–40% more surface. Failing to apply the pitch multiplier leaves you short by several squares.
- Forgetting the waste factor. Cutting shingles around valleys, hips, and edges wastes 10–15%. Buying exactly the calculated amount guarantees a second trip mid-project.
- Ignoring starter strips and ridge caps. These are separate products from field shingles. Many first-timers order only field bundles and are surprised at the eaves and ridge.
- Overlooking underlayment and accessories. Shingles are only part of the order — felt or synthetic underlayment, drip edge, and ice-and-water shield all need to be counted for a complete job.
Related Project Considerations
- Measure your actual pitch first. Roof surface depends heavily on slope, so determine your pitch (rise over 12) before ordering. A 6:12 roof needs about 12% more material than the flat footprint suggests.
- Count valleys, hips, and penetrations. Each valley, hip, and chimney increases both waste and the need for flashing. Complex roofs push the waste factor toward 15% rather than 10%.
- Check local code for underlayment. Many jurisdictions now require ice-and-water shield along eaves in cold climates and a specific underlayment type — verify before ordering the full system.
Frequently Asked Questions
What is a roofing square?
A roofing square is a unit of measurement equal to 100 square feet of roof area. It is the standard unit contractors and suppliers use for ordering roofing materials. A 1,500 sq ft roof equals 15 squares. Three bundles of standard 3-tab shingles cover one square, while heavier architectural shingles may require 4 bundles per square — always check the coverage listed on the bundle wrapper.
How much does it cost to reshingle a 1,500 sq ft roof?
Materials cost $1,500–$3,300 for shingles plus $300–$600 for underlayment, drip edge, flashing, and fasteners. Professional installation adds $3,000–$6,000 in labor for tear-off, disposal, and reshingling. Total: $4,800–$9,900 depending on material grade and local labor rates. Steep roofs, multiple layers of old shingles, or extensive deck repair push costs toward the high end.
How long does it take to reshingle a 1,500 sq ft roof?
A professional crew of 3–4 workers can strip and reshingle a 1,500 sq ft roof in 1–2 days under good conditions. Complex roofs with many valleys, dormers, skylights, or steep pitch may take 2–3 days. Weather delays can extend the timeline, so most contractors will not start a tear-off unless they have a clear forecast window to get the new shingles and underlayment on before rain.