Key Takeaways
The 10 questions every Illinois homeowner should ask a roofing contractor before signing — certification, licensing, warranty, and payment terms.
Before you sign anything, the right questions separate a contractor who will still be answering your calls in five years from one who won't. Ask about certification, licensing, warranty structure, crew ownership, and payment terms up front — the answers tell you more than any sales pitch will.
1. Are You GAF Master Elite Certified (or Equivalent)?
Manufacturer certifications aren't just marketing badges — they're proof a contractor has passed factory training, carries proper insurance, and meets minimum installation standards. GAF's Master Elite designation is held by fewer than 3% of roofing contractors nationally, and it's what unlocks GAF's enhanced Golden Pledge warranty coverage. If a contractor can't name their certification level or explain what it covers, that's worth noting.
2. Are You Licensed With the State of Illinois?
Illinois requires roofing contractors to hold a license issued by the Illinois Department of Financial and Professional Regulation (IDFPR) under the Illinois Roofing Industry Licensing Act. Ask for the license number and verify it yourself — see our full guide on how to verify a roofing contractor's license in Illinois for the exact lookup process.
3. What Does Your Insurance and Bonding Actually Cover?
A contractor should carry general liability insurance and workers' compensation coverage, and be able to produce a certificate on request. This protects you if a worker is injured on your property or if damage occurs during the project. Never take "we're insured" at face value — ask to see the certificate.
4. Will I Get a Written, Itemized Estimate?
A trustworthy estimate breaks out material cost, labor, tear-off/disposal, and any permit or code-upgrade line items — not a single vague lump-sum number. For a standard architectural asphalt shingle replacement on a typical Naperville colonial (roughly 24 squares), installed pricing generally runs $12,000 to $17,500. A quote that's vague about scope makes it hard to compare bids apples-to-apples.
5. What's the Difference Between Manufacturer, Workmanship, and Enhanced Warranties?
Most homeowners assume "warranty" means one thing. It doesn't. The manufacturer's warranty covers defective shingles; a workmanship warranty (backed by the contractor) covers installation errors; an enhanced warranty like GAF's Golden Pledge — only available through Master Elite contractors — combines both with stronger terms. Ask which type you're getting and how long each lasts.
6. Do You Use Your Own Crew, or Subcontractors?
Subcontracted labor isn't automatically a red flag, but it does mean less accountability if something goes wrong — you may be dealing with a different crew than the one that sold you the job. Ask directly whether the installers are employees or subs, and who is on-site supervising the work.
7. Who Handles the Permit?
In Naperville, a standard asphalt shingle re-roof over existing sheathing is typically permit-exempt, but permits are required when decking is being replaced or a different material is going on. A contractor familiar with local code should be able to explain, without hesitation, whether your specific project needs one and who's pulling it.
8. Can I See References or a Local Portfolio?
Ask for addresses or photos of completed jobs in your area — Naperville, Aurora, Wheaton, Lisle, or elsewhere in DuPage and Will County. A contractor with genuine local tenure should have no trouble showing recent, verifiable work nearby.
9. What's Your Payment Schedule?
Illinois law limits the upfront deposit a home-repair contractor can require on a residential project — a legitimate contractor's payment schedule should reflect that a small deposit is normal, with the balance tied to material delivery and job completion, not paid entirely upfront. For more on what a problematic payment structure looks like, see red flags in a roofing quote.
10. Are You a Storm Chaser?
After a hail or wind event, out-of-town crews often go door to door offering fast, cheap repairs — then vanish before warranty issues surface. Ask how long the company has served the area (a company local since 2005, for example, has a track record you can actually check) and whether they'll still be reachable a year from now if a warranty claim comes up.
Getting straight answers to these ten questions is the fastest way to filter out contractors who aren't equipped to do the job right. For a full breakdown of what's involved in a professional installation, see our roof replacement guide, and browse more hiring guidance in our Hiring a Roofer & Buying Guide hub.