What line items should a roof replacement quote include?

A roof quote becomes reliable when it explains what happens after the old shingles come off. The shingle brand matters, but the tear-off, deck condition, flashing, ventilation, and disposal terms decide whether the total holds once the crew is on the roof.

The ten lines a complete quote needs

1. Measured roof area, in squares. One roofing square is 100 square feet of roof surface. The number should reflect pitch and overhangs, not just the home's floor area.
2. Tear-off scope. The quote should state how many existing layers are included and what an additional layer costs if one is discovered.
3. Shingle system. Get the manufacturer, product line, color, wind rating, starter strip, ridge cap, and fastener pattern in writing.
4. Underlayment and leak barrier. The proposal should distinguish synthetic underlayment from ice-and-water membrane and state where each goes.
5. Flashing. Chimneys, walls, valleys, plumbing vents, and skylights need named details. “Reuse as needed” shifts the risk to you.
6. Decking allowance. The bid should state the included number of replacement sheets or the price per sheet after tear-off.
7. Ventilation. Intake and exhaust must work together. Ask whether ridge, soffit, box, or powered vents are being added or removed.
8. Permit and code upgrades. The responsible party and fee should be explicit.
9. Disposal and cleanup. Include the dumpster, haul-away, magnetic nail sweep, and protection for landscaping and siding.
10. Two warranties. Manufacturer material coverage and contractor workmanship coverage are separate.

The allowance that matters most: decking

Nobody can fully inspect the deck through the existing roof covering. That makes a decking allowance legitimate, but it should not be blank. Ask for the unit price per 4-by-8 sheet, the labor included, the approval process, and photos before replacement.

A bid with a slightly higher total and a clear decking price may be safer than a lower bid that says “wood extra.” Once the roof is open, you have little leverage over an undefined charge.

Compare bids on the same scope

Create one comparison sheet with rows for each line above. Mark included, excluded, allowance, or unclear for every contractor. Then compare totals. This prevents a bare-bones bid from looking cheaper simply because it left out flashing, permit, or cleanup.

Work through a two-bid example

Assume Bid A is $12,800 and Bid B is $14,100. The lower total looks better until the scopes are normalized:

The table does not prove Bid B is the right choice. It shows that the totals do not describe the same job. Ask Bid A to price the missing scope and ask Bid B whether every replacement is necessary. Once both proposals answer the same questions, compare the revised totals.

Put change-order rules in the contract

Hidden conditions are real, but “unknown” should not mean “unpriced.” Before signing, define:

• The unit price for decking, fascia, and other likely hidden repairs.
• The number of units included in the base contract, if any.
• Who can authorize additional work and at what dollar threshold.
• What photos or video will document concealed damage.
• Whether schedule extensions or material substitutions require written approval.
• How credits are handled when an allowance is not used.

A text message sent after the roof is open is a poor substitute for agreed rules. Written unit prices let the crew keep moving while preserving the homeowner's ability to verify the change.

Check the final packet before payment

The last invoice should match the signed scope plus approved changes. Collect the permit closeout where required, product and workmanship warranty documents, final material names and colors, proof of cleanup, and any lien releases appropriate to the project and state. Save attic or deck photos with the house records; they can explain future repairs better than a one-line receipt.

Ask the contractor to complete the agreed nail sweep before treating the cleanup as finished. If you want a tool for later spot checks of accessible paths, a rolling magnetic sweeper is an option. It does not replace the crew's cleanup responsibility or prove the yard is free of sharp debris.

If you need the overall budget first, use the full roof replacement cost guide. If the roof has storm damage, read the insurance claim guide before signing an assignment or repair authorization.

Research sources

• NRCA: National Roofing Contractors Association. Decking, flashing, and ventilation scope.
• EPA: Using Cool Roofs to Reduce Heat Islands. The energy-efficiency claims for reflective materials.
• FTC: How to Avoid a Home Improvement Scam. Vetting bids and deposits.