Worked example: a 48×28 ranch with a 6/12 pitch
Footprint is 1,344 sq ft. The 6/12 pitch multiplier (1.118) raises true roof area to 1,503 sq ft. With 12% waste you need 1,683 sq ft of coverage — 16.8 squares, so 51 bundles. At $38 per bundle that's $1,938 in shingles, plus 5 rolls of underlayment (~$225), drip edge, and nails. A supplier quote near $2,400–2,600 for full materials is in range.
- • Always round up: running short mid-job costs more in a second delivery fee than the extra bundles.
- • Unopened bundles are returnable at most suppliers — over-order by one bundle rather than under-order.
- • Hip roofs and valleys push waste to 15–18%; complex Victorian cuts can hit 20%.
Measuring without climbing the roof
Measure the exterior walls, add overhang (typically 1 ft each side), and use the pitch multiplier — you can read pitch from the ground with a level and tape at the gable end. Satellite measurement services used by roofers are accurate within 2–3% and are worth it on complex roofs.
FAQ
How many bundles of shingles do I need for 1,000 sq ft?
10 squares = 30 bundles for the surface itself, plus waste. With a 10% waste factor on a simple gable, order 33 bundles.
What is a roofing square?
The standard roofing unit: 100 sq ft of roof surface. Prices, labor rates, and material quantities are all quoted per square.
How much does a bundle of shingles cost in 2026?
Standard architectural shingles run $30–$45 per bundle; designer or Class-4 impact-rated shingles run $50–$90.
How do I account for pitch?
Multiply footprint area by √(1 + (pitch/12)²). A 4/12 adds ~5%, 6/12 adds ~12%, 8/12 adds ~20%, 12/12 adds ~41%.
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