When it comes to protecting your commercial property, your roof is one of the most critical components of the structure. Whether you’re managing an office building, retail space, industrial facility, or multi-use property, your roof safeguards valuable equipment, employees, and your daily operations. But when the time comes for repairs, restoration, or replacement, how do you ensure you’re working with a roofing contractor you can trust?
At Motor City Roofers, we’ve been serving Detroit and Southeast Michigan for decades, and we know that the right contractor makes all the difference. With that in mind, here are five key steps to help you find a reputable commercial roofing contractor who can deliver quality results, safely and reliably.

1. Verify Licensing, Insurance, and Certifications
Before you sign anything, ensure the roofing contractor is properly licensed and insured. In Michigan, contractors performing work over $600 must be licensed by the Michigan Department of Licensing and Regulatory Affairs (LARA). A reputable roofing company will be transparent about their credentials and gladly provide documentation.
Key things to look for include:

• State license number
• Liability insurance (to protect your property)
• Workers’ compensation insurance (to protect you from liability if someone is injured on-site)
• Certifications from manufacturers, such as GAF, Carlisle, Firestone, or Mule-Hide. These show the contractor has been trained to install specific roofing systems according to manufacturer standards.

Choosing an unlicensed or underinsured contractor might save you money upfront—but it could lead to significant legal and financial trouble later. Always ask for proof before allowing work to begin.

2. Check Commercial Experience and Local References
Not all roofers are equal. Residential roofing contractors may not have the skills, tools, or crew to handle large-scale commercial projects. Commercial roofing requires knowledge of flat and low-slope systems, compliance with local codes, proper drainage planning, and experience navigating large building layouts with HVAC units, vents, and other penetrations.
Ask the contractor:

• How many commercial roofs have you installed or repaired?
• What roofing systems are you most experienced with (e.g., EPDM, TPO, PVC, metal, BUR)?
• Can you provide references from other commercial clients in the Detroit area?

A reputable commercial roofer should have a portfolio of completed projects, testimonials, and case studies. At Motor City Roofers, we’re happy to provide references and show you examples of our work in Metro Detroit’s commercial sectors.

3. Evaluate Their Inspection and Proposal Process
A professional roofing contractor won’t just give you a quote over the phone. They should visit your property, perform a detailed inspection, and explain your options in a written proposal.
What a quality inspection should include:

• A walk-through of the roof surface
• Moisture detection (infrared scans, if necessary)
• Drainage and insulation assessment
• Review of flashing, seams, penetrations, and edges
• Photographic documentation of any issues found

Their proposal should outline:

• Scope of work
• Materials to be used
• Timeline for completion
• Warranty details (both labor and material)
• Total cost and payment structure

Be wary of vague or generic proposals. A reputable contractor will take the time to educate you and walk you through each element of the plan, giving you the confidence to make an informed decision.

4. Review Safety Practices and Crew Training
Roofing is dangerous work, especially on large commercial structures. A contractor that prioritizes safety not only protects its workers but also reduces your liability risk. Ask the contractor about their safety protocols:

• Are workers trained in OSHA standards?
• Do they conduct regular safety meetings?
• Are fall protection systems used (harnesses, guardrails, warning lines)?
• What’s their EMR (Experience Modification Rate), which reflects a company’s safety record?

You should also ask about crew training. A reputable contractor invests in ongoing training and certification to ensure their team is up to date with the latest materials, installation techniques, and regulations.
At Motor City Roofers, our crews are fully OSHA-compliant, and our job sites follow strict safety guidelines, including daily checklists and PPE enforcement.

5. Understand the Warranty and Follow-Up Service
The best commercial roofing contractors stand behind their work with robust warranties and long-term support. Your contractor should explain the difference between:

• Manufacturer’s warranty: Covers defects in roofing materials
• Workmanship/labor warranty: Covers errors during installation

Typical commercial roofing warranties range from 10 to 30 years, depending on the system used. Be sure to understand what is—and isn’t—covered, and get it in writing.
Also, ask what happens after the job is done:

• Will the contractor provide regular maintenance plans?
• Is there a service department for leak calls or warranty issues?
• How quickly can they respond to emergency repairs?

At Motor City Roofers, we offer tailored maintenance programs to keep your commercial roof in peak condition. Our dedicated service team ensures that any warranty issues or leaks are addressed promptly and professionally.

Bonus Tip: Trust Your Instincts and Do Your ResearchFinding a reputable roofing contractor isn’t just about licenses and paperwork—it’s about professionalism, communication, and trust. Look for signs that the contractor values your business:

• Prompt replies to emails and phone calls
• Clear, courteous communication
• A willingness to answer all your questions
• Respectful, professional behavior during the site visit

Check online reviews, Better Business Bureau ratings, and third-party platforms like Google or Angi. Look for consistent patterns of positive feedback and how the company responds to any negative comments.

Final Thoughts
Your commercial roof is a major investment, and who you choose to install or repair it can impact your property’s safety, efficiency, and long-term costs. Don’t rush the process. Take time to evaluate credentials, experience, safety, transparency, and reputation.  At Motor City Roofers, we pride ourselves on being a trusted commercial roofing partner in the Detroit area. From detailed inspections and honest recommendations to expert installations and responsive service, we’re committed to quality from start to finish.

Ready to Work With a Reputable Roofing Contractor?Contact Motor City Roofers today to schedule your free commercial roof assessment.
📍 Serving Detroit & Southeast Michigan
🌐 www.motorcityroofers.com
We’re here to protect your property, your budget, and your peace of mind.