5 Questions to Ask Before Hiring a Roofing Contractor
Choosing the right contractor for your commercial roofing project can make all the difference. Whether you’re patching up an existing system or planning a full replacement, asking the right questions up front helps you find someone who knows what they’re doing and who’ll follow through. Commercial roofing is more complex than residential work, so it’s worth spending a little extra time making sure your contractor fits.
Are You Licensed and Insured for Commercial Projects?
Don’t assume all roofing companies meet the same standards. For commercial work, it’s critical that the contractor is properly licensed in your area and carries both general liability and workers’ compensation insurance. Not only does this protect their crew– it protects your building, too.
What Kind of Experience Do You Have With This Type of Roof?
Commercial roofs aren’t one-size-fits-all. Materials like TPO, modified bitumen, or metal panels each come with their installation process. Ask whether the contractor has hands-on experience with your roof type and if they’ve worked on projects similar in scale. Familiarity with insulation systems, drainage design, and large-format layouts can directly impact how well the work holds up– and how often you’ll need future roof repair.
Can You Share References From Recent Jobs?
Hearing from past clients is one of the best ways to judge a roof contractor’s reliability. Ask to speak with other business owners who’ve hired them recently. Find out how the contractor communicated, handled changes, or dealt with any hiccups along the way. Solid references and a few successful projects under their belt go a long way in helping you feel confident.
What Are Your On-Site Safety Practices?
On a commercial site, safety isn’t optional– it’s essential. Ask about fall protection, training procedures, and how they manage tools and equipment. Contractors should have a written safety plan and follow OSHA guidelines closely. The more proactive they are about protecting their crew and your property, the more smoothly your project will run.
Do You Offer a Warranty and Ongoing Support?
A good contractor doesn’t disappear after the job is done. Ask what kind of warranty they offer– not just on materials, but on the work itself. Also, find out if they offer roof repair follow-up services like inspections or seasonal maintenance. A strong warranty paired with solid post-installation support helps ensure that your investment is protected.
Don’t Skip the Timeline and Communication Details
Aside from licenses and references, you’ll also want to understand how your contractor manages the job itself. What’s the expected timeline? How do they handle material delivery or weather delays? How will they keep you updated– daily reports, weekly meetings, or milestone check-ins? Knowing how and when you’ll get updates can help avoid misunderstandings.
Taking the time to ask these questions helps you choose a roofing contractor who’s not just qualified– but also reliable and easy to work with. In commercial roofing, you need more than just technical skill. You need a partner who communicates clearly, respects your property, and stands behind their work every step of the way.
Conduct Walkthrough Inspections Before Roof Replacement
Before committing to a full roof replacement, a commercial roofing walkthrough inspection is one crucial step that often gets overlooked. It may sound basic, but this simple visit can prevent major headaches down the line. If you manage a warehouse, a school, or a commercial plaza, you know there’s no room for guesswork. A walkthrough gives your contractor the chance to understand the roof as more than what’s listed on a quote or blueprint.
Why the Walkthrough Is More Than Just a Formality
Roof repairs aren’t small jobs. They bring in permits, heavy equipment, scheduling conflicts, and costs that rise quickly if surprises pop up. A proper walkthrough looks beyond the surface. One contractor recently uncovered severe rust in a metal deck at a logistics center. The issue wasn’t visible from the surface but would’ve caused serious safety concerns mid-project. Walkthroughs can reveal whether a full replacement is truly needed.
What Contractors Look For
There’s a lot more to these visits than just walking across the roof. A seasoned roofing contractor checks the membrane for punctures, the flashings for lifting edges, and the transitions between roof planes for signs of wear. They’ll tap on suspect sections, test for moisture, and inspect any patched or modified areas. Older buildings might have had solar panels added, units relocated, or materials swapped over the years.
The Access Factor
Sometimes, the biggest challenge is getting to the roof itself. Contractors of commercial roofing use the walkthrough to plan how equipment, materials, and crews will reach the site. Can a crane access the lot? Will deliveries block staff entry points? Are there restrictions on working hours in mixed-use buildings? These questions may seem small now, but ignoring them can lead to delays, cost overruns, and frustrated tenants.
Know the Roof’s History to Avoid Future Mistakes
A walkthrough is also a conversation. A contractor will want to hear about previous leaks, areas that ice over in winter, and repairs that didn’t hold up. These details fill in the blanks that even the most detailed inspection can miss. When the roofing team understands the building’s history, they’re better equipped to avoid repeating past failures.
Match Materials to Conditions, Not Just Budgets
If the roof handles heavy foot traffic from maintenance crews or HVAC teams, the membrane must be more durable. Buildings in hot zones need UV-resistant systems; industrial facilities might require chemical-resistant surfaces. A walkthrough allows the contractor to recommend systems that fit the specific needs.
Beyond the Roof Surface
The inspection doesn’t stop at the edge of the membrane. Walls, parapets, scuppers, and even adjacent building elements matter. For example, if scuppers are undersized or blocked, water backs up and compromises the entire system. A full-system view ensures you’re not just replacing a roof– you’re upgrading the performance of everything around it.
Walkthroughs aren’t just a box to check– they’re the blueprint for a smooth, efficient, and successful roofing project. Skipping them means building on assumptions. Taking the time to do them right means your project starts with answers, not questions.
Perform Flat Roof Inspections Every Season
Flat roofs may be popular in commercial roofing, but they bring their own set of challenges. Their low slope looks sleek and maximizes usable space, but it also invites pooling water, debris buildup, and early membrane wear. Regular inspections aren’t just recommended– they’re essential. If you wait until a leak shows up inside the building, you’ve already missed your chance to prevent it.
Why Flat Roofs Face Seasonal Strain
Each season tests your roof in different ways. In spring, thawing ice reveals hidden cracks. Summer heat softens roofing materials, often leading to blisters or seam separation. Come fall, leaves and windblown debris collect in drainage areas. And winter? Between snow weight and freeze-thaw cycles, flat roofs take a beating. These conditions don’t just stress the surface—they gradually weaken the entire system. And that can mean unexpected roof repair just when your building can least afford the downtime.
What a Thorough Inspection Should Include
A true inspection is more than a casual look with a flashlight. A seasoned roofing contractor checks for early membrane wear, loose seams, blistering, and standing water. We also inspect edge flashing, roof penetrations, and nearby equipment—HVAC units and vents can cause trouble if seals have degraded. Many of these issues aren’t obvious from the ground, and they’re often missed in generic walkthroughs by building staff.
Roof Type Dictates Inspection Strategy
Your material matters more than you might think. EPDM rubber responds differently to stress than TPO or modified bitumen. One flat roof we checked last fall had edge shrinkage common with aging EPDM. It wasn’t leaking yet, but it was pulling away from the flashing. If you don’t understand the behavior of your specific roofing system, you won’t know where to look– or what to fix before it gets worse.
Why Commercial Buildings Need Consistent Oversight
Commercial roofs cover more than just surface area—they often support HVAC platforms, skylights, solar arrays, or heavy foot traffic. These stress points can weaken over time, especially near seams or transition areas. Some of our clients also face insurance or leasing obligations that require regular maintenance logs. Scheduled inspections not only meet those requirements– they avoid surprises.
Choosing a Roofing Contractor Who Knows Flat Roofs
Experience matters here. You want someone who doesn’t just glance around but knows where to dig deeper. Tools like thermal cameras, drones, and moisture scanners help us identify problems without tearing anything open. But the tech only works if you know how to use it—and more importantly, how to act on what it shows. A good contractor won’t push unnecessary repairs. They’ll give you a real picture of what needs attention and what can wait.
You wouldn’t skip HVAC service or fire alarm checks—your roof deserves the same treatment. It protects your inventory, your staff, and your business continuity. Treating inspections as routine, rather than reactive, keeps your operations running smoothly and your repair budget in check. In the long run, those hour-long visits each season can prevent a lot more than just water damage.