How to Choose a Roofing Contractor: 10 Questions to Ask

Why Contractor Selection Is the Most Important Roofing Decision

Material quality accounts for roughly 40% of a roof's long-term performance. Installation quality accounts for the other 60%. A premium architectural shingle incorrectly nailed — fasteners too high, driven at the wrong angle, or with improper spacing — performs worse than a budget shingle installed correctly. The contractor makes the difference between a roof that performs to its design life and one that fails years early.

The residential roofing industry has a higher proportion of unqualified or uninsured operators than most home services trades because the barriers to entry are low and demand spikes seasonally after storms. Storm-chaser operations — contractors who follow severe weather events, solicit aggressively, and move on before warranty issues surface — are particularly prevalent after major hail or hurricane events. Knowing how to verify contractor credentials protects your investment.

Credentials to Verify Before Any Work Begins

License verification is the first filter. Most states require roofing contractors to hold a state contractor's license. Verify the license number directly with your state contractor licensing board — don't rely on a card or verbal confirmation. Licenses can expire, be suspended, or be listed under a different business name than the contractor is currently operating under. An unlicensed contractor has no state accountability if they disappear or produce defective work.

General liability insurance: request a certificate of insurance with your address as the certificate holder. The minimum adequate coverage for a residential roofing project is $1 million per occurrence in general liability. Workers' compensation insurance covers employees injured on your property — without it, an injured worker may have legal recourse against your homeowners policy. Call the insurer listed on the certificate to verify the policy is active.

Manufacturer certification indicates that a contractor has completed formal installation training for a specific material system. GAF Master Elite, CertainTeed SELECT ShingleMaster, and Owens Corning Preferred Contractor designations indicate training and accountability within manufacturer programs. Certified contractors can offer enhanced warranties — typically extended workmanship coverage beyond what uncertified installers can provide.

• State contractor license — verify directly with the licensing board
• General liability insurance certificate ($1M minimum) — verify with insurer
• Workers' compensation certificate — verify active status
• Manufacturer certification (GAF, CertainTeed, or Owens Corning preferred)

Questions That Reveal Contractor Quality

Question 5 — Who performs the actual installation? Some contractors operate as general contractors who subcontract the physical installation to crews they don't directly manage. Ask specifically: Are your installers employees or subcontractors? Who will be on my roof? Subcontracted labor is not inherently a problem, but you should know who is accountable for the work.

Question 6 — What does the warranty cover and for how long? Manufacturer material warranties cover defects in the roofing product itself. Contractor workmanship warranties cover installation defects — improper nailing, failed flashing, inadequate ventilation installation. The workmanship warranty is what protects you when a leak develops at a contractor error rather than a material defect. Verify both what is covered and the claims process if a problem occurs.

Question 7 — What is included in the tear-off and preparation scope? A quote that seems low may be excluding decking inspection and repair, ice-and-water shield in required zones, ventilation upgrades, or permit fees. Ask the contractor to walk through every line item in the scope before you accept the estimate. Exclusions that seem minor in the estimate become significant when they generate add-on charges mid-project.

• Who performs the installation — employees or subcontractors?
• What does the workmanship warranty cover and for how long?
• Is decking repair included or billed as an add-on?
• Are permits included and who pulls them?
• What ventilation upgrades are included if required?

Red Flags That Identify Contractors to Avoid

Door-to-door solicitation immediately after a storm is the clearest storm-chaser signal. Legitimate established contractors don't need to knock doors aggressively in the hours after a hail event — their existing reputation generates inbound calls. Contractors who appear at your door within 24 hours of a storm, offer unusually fast timelines, and pressure for immediate signature should be declined.

Cash-only payment requirements or large upfront deposits beyond the material cost are red flags. Standard practice for residential roofing is a deposit covering material purchase (typically 30–50% of total contract) with the balance due at job completion. A contractor requesting 80–100% payment before any work begins has no financial incentive to return or address problems.

Missing written warranty documentation, verbal-only scope descriptions, and reluctance to provide insurance certificates before work begins are all disqualifying behaviors. If a contractor refuses to provide a written scope of work, a written warranty document, and verifiable insurance certificates within a reasonable timeframe, find a different contractor regardless of how competitive the price appears.