How this roof replacement estimate works
The calculator estimates roofing material, installation labor, tear-off, decking repair, underlayment, flashing, vents, pipe boots, skylights, chimney work, gutters, disposal, permits, warranty, tax, timing, and contingency from the scope you enter. It is intended for planning and bid comparison, not as a substitute for an on-site roofing inspection.
Planning guardrail: roof bids should confirm measured roof area, pitch, roof planes, material brand, underlayment, ice and water shield, ventilation, flashing details, decking repair rules, permit responsibility, warranty, cleanup, and what happens if hidden sheathing damage is found.
Why roof replacement prices vary
- Roof area, pitch, stories, roof shape, access, and safety setup drive labor time.
- Material choice, grade, underlayment, ridge vent, flashing, pipe boots, skylights, chimneys, and gutter work affect material and accessory cost.
- Tear-off layers, decking rot, disposal, permits, inspection requirements, storm-season demand, and local labor rates can move a quote substantially.
- Metal, tile, and flat membrane roofs need different crews, fasteners, details, and warranty assumptions than asphalt shingles.
What to confirm before signing
- Exact product: manufacturer, shingle or panel line, color, warranty level, underlayment, and accessories.
- Scope: tear-off layers, disposal, drip edge, valley flashing, step flashing, chimney flashing, vents, pipe boots, skylights, gutters, and cleanup.
- Repair terms: how rotten decking, fascia damage, water intrusion, framing issues, and hidden sheathing problems are priced.
- Warranty: labor warranty, manufacturer warranty, enhanced warranty eligibility, ventilation requirements, transferability, and exclusions.