The roof estimate questions to ask before you sign

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A roof sold to you as a 25-year investment often gives up around year 15, and the shingles are rarely to blame. The average residential roof runs 15 to 20 years in practice, according to consumer guidance from the California Contractors State License Board. That is a long way from the numbers on the box.

The distance between those two figures is where a contractor’s estimate does most of its damage. Not in the price on the last line, but in what the paperwork leaves unsaid. The questions below are the ones worth asking before you sign, sorted by the kind of estimate in front of you.

The Estimate That Arrives the Day After a Storm

Someone knocked, said they noticed damage from the road, and left a card. The estimate came the next morning. It looks reasonable, and the person seems nice. This is the situation the Federal Trade Commission warns about in its post-disaster consumer alert: out-of-town crews who follow weather patterns, work fast, take deposits, and are hard to find when a problem shows up two winters later.

Before anything else, ask for a license number and an insurance certificate you can verify with the issuing agency yourself, not a photo on a phone. Ask how long the company has worked under its current name. A settled local company like Roofing Concepts Unlimited will hand that paperwork over without being asked. Ask for three local references from jobs finished more than a year ago, and call them.

A shrug or a deflection on any of that turns the estimate from a bargain into a bet you’re being invited to place with your own house.

The Estimate That Beats Every Other Bid by Thousands

A low bid isn’t automatically a bad bid, but it does need to explain itself. When one number sits far below the others, the question is what the low bidder is leaving out that the others are including.

• Tear-off vs. overlay. Ask whether the old roof is coming off down to the deck or a new layer is going over the top. An overlay is cheaper and shorter-lived, and it can hide rot underneath.
• Decking allowance. Ask what happens if the crew finds soft or rotten sheathing once the shingles are up. A price per sheet belongs in the estimate, not in a conversation shouted up a ladder.
• Underlayment and flashing. Ask which underlayment is being installed and whether flashing around chimneys, valleys, and vents is being replaced or reused. Reused flashing is where most “new” roofs start leaking first.
• Nails per shingle. Ask how many fasteners per shingle the crew will use and whether that meets the local code for your wind zone. In higher-wind areas, codes can require six nails per shingle rather than the standard four.

A low estimate that can’t answer those four in writing is quoting a smaller job under the same name as everyone else.

The Estimate From the Company Your Neighbor Loved

A referral is the strongest lead you can get, and also the one most likely to skip the vetting step. You trust your neighbor, so you trust her roofer, so you sign. That’s where the trouble starts.

Ask the same paperwork questions you would ask a stranger. Confirm the license is current and in the correct classification for your work. Confirm general liability and workers’ compensation coverage are active on the day work begins, not the day the quote was written. If a contractor bristles at documentation, that’s the answer.

Ask, too, whether the crew doing your roof is in-house or subcontracted. Referrals travel by owner name, but the people on the ladder may be someone else entirely.

The Estimate With a Big Deposit on Line One

Deposits are normal. Large deposits are a warning. Consumer-protection guidance in several jurisdictions caps residential down payments at a small share of the contract, and advises never paying in cash and never making the final payment until the work satisfies you. Your area’s rule may be different, so check before you sign anything.

A payment schedule tied to milestones like tear-off complete, dry-in complete, and final inspection passed protects both sides. A schedule that front-loads the money protects only the contractor.

What to Do Before You Sign Anything

1. Get everything in writing. Materials, brands, colors, quantities, tear-off scope, decking allowance, cleanup, timeline, and payment schedule. Verbal promises do not survive a dispute.
2. Verify the license and insurance yourself. Call or search the issuing agency directly. A certificate handed to you is a starting point, not proof.
3. Read the cancellation clause. Know how many days you have to back out and what it costs you if you do.
4. Hold the final payment. Walk the property, look at the yard for stray nails, look at the attic for daylight and staining, and confirm the local inspection has passed before you release the last check.

A good contractor will welcome every one of these questions. A contractor who won’t is telling you something important, for free, before the work begins.