How is the roof replacement range calculated?
The tool combines roof surface area with material, installation and removal allowances. It shows a budget range so you can compare options before arranging a roof inspection.
- Measure the roof surface. Confirm the detected building or enter a known roof surface area. House floor area is not roof area.
- Choose the covering. Compare three-tab shingles, architectural shingles and standing-seam metal.
- Read the scope. Pitch, mixed slopes, flashing, decking damage and site access can change the final proposal.
- Get the actual job priced. A contractor supplies their own written scope, schedule and price.
What does the range include?
Field roofing materials, a material-waste allowance, installation labor and removal/disposal allowances form the model. The result is a whole-roof replacement budget, rather than a price for repairing a leak.
Where do the pricing inputs come from?
Public retail roofing prices, national installation benchmarks and Washington wage data ground the model. Washington employee wages adjust the labor sensitivity; they are not contractor billing rates.
- Home Depot GAF Royal Sovereign field-shingle retail observation
U.S. public retail observation: GAF Royal Sovereign 3-tab $38.97/bundle, 33.33 square feet coverage. Field shingles only. Store, stock, delivery and tax vary; no Washington store quote or complete roof assembly is established.
- Home Depot GAF Timberline HDZ field-shingle retail observation
U.S. public retail observation: GAF Timberline HDZ architectural $42.97/bundle, 33.33 square feet coverage. Field shingles only. Store, stock, delivery and tax vary; no Washington store quote or complete roof assembly is established.
- Roofr national contractor material/labor planning inputs
National planning inputs: asphalt installation labor $1.50–$2.50/square foot; metal installation labor $2.50–$4.00/square foot and material $3–$7/square foot. Sample, vintage, Washington representation and full included scope are unstated; these are not retail reroof quotes.
- Roofr bidding guide material waste guidance
10–15% material waste guidance, applied once to field-material order quantity. It does not increase measured roof surface, labor or removal quantity.
- O*NET/BLS roofer median employee wages
BLS May 2024 roofer employee median hourly wages: Washington $29.01; U.S. $24.51. Their ratio is a labor-only modeling sensitivity, not a contractor selling rate or city price multiplier.
Model reviewed 2026-10-17 · wa-roof-planning-20261017-v2