Here is the fix: ask these ten questions. A good roofer answers every one without blinking. A bad one gets vague, dodges, or pressures you to sign today. Print this list and bring it to every estimate.
Credentials and Protection
1. "Are you licensed and insured? Can I verify it myself?"
What you want to hear: "Yes. Here is our license number, and I will have our insurer email you the certificate directly." Then actually verify it with your state licensing board. Here is the thing: roofing has the highest injury rate in home construction. A roofer without workers' comp who gets hurt on your property can come after you. This is not paperwork, it is protection.
2. "Are you certified by the shingle manufacturer?"
What you want to hear: A specific credential like GAF Master Elite, Owens Corning Preferred, or CertainTeed SELECT ShingleMaster. Why it matters: certified installers can offer extended manufacturer warranties (up to 50 years) that uncertified roofers simply cannot. It also means the manufacturer trusts this crew enough to put their name on the line.
Materials and Scope
3. "Exactly what materials are you installing? I want brand, product line, and specs in writing."
What you want to hear: Specifics on paper: "GAF Timberline HDZ architectural shingles, synthetic underlayment, ice-and-water shield at eaves and valleys." Vague answers like "top-quality shingles" are a blank check. Without brand and line in the contract, they can substitute cheaper materials and you would never know until the roof fails early.
4. "Is this a full tear-off? And what happens if you find rotted decking underneath?"
What you want to hear: "Full tear-off down to the deck. If we find rot, we charge $X per sheet for replacement, we photograph every bad section, and we get your approval before proceeding." The wrong answer is a shrug. Surprise deck charges are the number one roofing billing dispute in America, and it is entirely preventable with this one question.
5. "What is your ventilation plan for my attic?"
What you want to hear: An actual plan, not a hand wave. Something like "ridge vent with soffit intake, sized for your attic square footage." Poor ventilation cooks shingles from the inside and voids most manufacturer warranties. If they say "your old vents are fine" without climbing up to look, that tells you everything about their thoroughness.
Money and Timeline
6. "Can I see an itemized quote with labor and materials separated?"
What you want to hear: Labor, materials, tear-off and disposal, permits, and the per-sheet deck replacement rate as separate line items. An itemized quote lets you compare apples to apples across bidders. Cross-check the numbers against our 2026 roof cost breakdown to spot anyone padding the bill.
7. "What is the payment schedule?"
What you want to hear: A modest deposit (10 to 33 percent), one mid-project payment, and the final balance due only after your walkthrough and final inspection. Here is a hard rule: full payment upfront is an instant walk-away, no exceptions. Legitimate roofers have supplier credit. They do not need your money to buy shingles.
8. "When do you start, how long will the job take, and what is your weather policy?"
What you want to hear: Specific start and end dates written into the contract, a crew size (4 to 6 workers for most homes), and a clear explanation of what happens when rain hits mid-job. Most residential roofs take 1 to 3 days. A roofer who will not commit to dates in writing is a roofer who will ghost you for someone else's emergency.
Accountability
9. "What warranties do I get, and who actually backs each one?"
What you want to hear: Two separate warranties, both in writing. First, the manufacturer's material warranty (25 to 50 years). Second, and more important, the roofer's own workmanship warranty (5 to 10 years minimum). Here is what most homeowners miss: the vast majority of roof failures are installation errors, not defective shingles. A material-only warranty protects you from almost nothing.
10. "Who supervises the crew on site, and how do you protect my property?"
What you want to hear: A named on-site supervisor, not "the crew knows what they are doing." Plus specifics: tarps over landscaping and AC units, magnetic nail sweeps of the entire yard (twice), gutter protection, and daily cleanup. Every "nail in the tire" horror story you have heard was preventable. The roofer either has a system or they do not.
Five Answers That Mean You Should Walk Away
- "We need 50 percent down to order materials." Standard shingles are stocked at local suppliers. This is a cash flow problem wearing a work uniform.
- "We can start tomorrow." Reputable roofers are booked 2 to 6 weeks out. Immediate availability means nobody else wants them.
- "You do not need a permit for this." You almost certainly do, and a roofer who skips permits will skip other things too.
- "Sign today and I will knock 20 percent off." High-pressure discounts are a desperation signal, not a deal.
- Knocking on your door after a storm offering "free inspections." This is the classic storm-chaser pattern. Real local roofers do not need to canvas neighborhoods.
Find Roofers Worth Interviewing
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