Our Guide to Commercial Reroofing

This is the time of year when many companies assess their roofing systems, and for good reason. The warmer, drier months are ideal for planning and executing reroofing projects with minimal disruption. In this guide, we’ll walk through the key signs that your roof may need attention, why reroofing is a cost-effective alternative to replacement, how the process works, and what to consider when choosing materials and contractors.

Signs It’s Time to Consider a Reroof

No commercial roof lasts forever. But the key to protecting your investment is recognizing the signs before a problem becomes a disaster. Frequent leaks are often the most obvious red flag. If your maintenance team is making repeated trips to address drips and water damage, your roof’s underlying structure may be compromised.

Visible surface damage can also point to deeper issues. Blisters, bubbling, cracks in the membrane, or separation at the seams all indicate wear that a simple patch may not fix. If your roof holds water after rainstorms or exhibits signs of sagging, you may be dealing with compromised drainage or structural fatigue.

Another major consideration is the age of your roof. Most commercial systems—whether TPO, PVC, EPDM, or built-up roofs—have an expected lifespan of 20 to 30 years with proper care. If your roof is reaching or has exceeded that window, it’s time for a full evaluation.

Why Choose Commercial Reroofing Over Repairs or Replacement

You might be wondering why reroofing makes sense compared to more familiar options like repairs or full tear-offs. Here’s why:

First, repairs are usually a short-term solution. While patching leaks or reinforcing weak spots can buy time, these quick fixes often don’t address the root of the problem. Over time, you may spend more on repeated repairs than you would have on a proactive reroofing project.

On the other end of the spectrum, full replacement involves tearing off all existing roofing material—a time-consuming and costly process. While necessary for roofs with significant structural damage or multiple layers, many buildings qualify for a reroof instead.

Reroofing, in simple terms, means installing a new layer of roofing material over the existing one. When done correctly, it extends the life of your roof, enhances weather resistance, and improves insulation—all at a lower cost and with less disruption than a full replacement.

How the Commercial Reroofing Process Works at GoGreen Roofing

Commercial reroofing isn’t something to rush, but it doesn’t have to be overwhelming either. When managed by the right contractor, the process is smooth, strategic, and predictable.

1. Roof Assessment and Inspection

The first step is a comprehensive inspection. At GoGreen Roofing, we evaluate the roof’s condition from both above and below the deck. We assess the existing membrane, insulation, structural integrity, drainage, and any penetration points like HVAC units, skylights, or drains.

2. Project Recommendation and Estimate

If your roof is eligible for reroofing, we prepare a detailed proposal. This includes material recommendations, installation strategy, project timeline, and warranty options. Our goal is transparency—you know what you’re getting and why it’s the right solution.

3. Permitting and Scheduling

Depending on your location and building codes, a reroof may require permits. We handle the paperwork, schedule the work at a time that minimizes operational impact, and ensure all materials are delivered on-site in time.

4. Preparation and Surface Conditioning

Before the new layer goes on, the existing roof is thoroughly cleaned and prepped. Damaged or loose sections are repaired to create a stable base, and flashing around penetrations is reinforced to prevent future leaks.

5. Installation of the New Roofing System

We install your selected roofing system—typically TPO, PVC, or a reflective cool roof membrane—over the prepped surface. Seams are heat-welded or adhered, depending on the system, to create a watertight barrier.

6. Final Inspection and Closeout

After installation, we perform a final quality assurance inspection and walk you through the results. You receive complete documentation, including warranties, maintenance guidance, and recommendations for ongoing care.

GoGreen Roofing offers comprehensive, no-pressure evaluations to help you determine whether reroofing is the right solution or if repairs will do for now. Either way, you’ll walk away with clear answers and a solid plan.

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Choosing the Right Roofing System and Contractor

The success of a commercial reroofing depends on two things: the right materials and the right people. Not every roofing system fits every building, so the selection process should be based on factors like climate, building usage, slope, existing roof composition, and your long-term energy and maintenance goals. A careful material selection ensures performance and can lead to improved energy efficiency and lower operational costs over time.

Popular options include:

TPO and PVC Membranes: These single-ply systems are ideal for flat or low-slope roofs and offer high reflectivity, chemical resistance, and ease of installation. They are a favorite for commercial properties looking to improve energy performance without breaking the bank.
Roof Coatings: Acrylic, silicone, or elastomeric coatings can be applied over an existing roof to seal leaks, reflect UV rays, and extend the life of the current system. This is an ideal solution when the underlying structure is still in good shape but needs rejuvenation.
Metal Overlays: Best suited for buildings with pitched or sloped roofs, metal systems provide exceptional durability, weather resistance, and longevity—often exceeding 40 years with proper maintenance.

Equally important is your choice of contractor. Look for a company with proven experience in commercial reroofing, proper licensing, manufacturer certifications, and a track record of customer satisfaction. Ask for references and insist on a detailed proposal that outlines costs, materials, timelines, and warranty terms.

What to Look for in a Commercial Roofing Contractor

When it comes to selecting a contractor, experience and credibility are non-negotiable. Look for a company with a deep portfolio of commercial reroofing projects, up-to-date licensing, bonding, and insurance, and manufacturer certifications that allow them to offer extended warranties. They should also be able to walk you through your options clearly, answer questions transparently, and back up their proposals with building-specific data.

At minimum, your contractor should provide:

A detailed, line-item proposal including materials, labor, and warranty terms
References from similar commercial reroof projects
Safety protocols and proof of compliance with local building codes
Timelines with realistic milestones for each phase of the project

The right roofing system and partner can make the difference between a short-term patch and a long-term investment in your property.

Maintaining Your New Roof for Maximum ROI

Once your commercial reroofing project is complete, the work doesn’t end there. A new roof is an investment—and like any investment, it requires maintenance to perform at its best.

Start by scheduling annual inspections, especially after major weather events. These help catch minor issues before they escalate. Keep your roof surface clean and free of debris. Clear drains and gutters regularly to prevent standing water, which can lead to premature degradation.

You should also track any roof work with a simple log that includes inspection dates, maintenance performed, and weather incidents. This documentation helps with warranty claims and provides clarity when planning future capital improvements.

Get the Most From Your Roof With GoGreen

At GoGreen Roofing, commercial reroofing is more than a seasonal service. We help building owners and facility managers extend the life of their assets with energy-efficient, environmentally responsible systems that deliver long-term value.

We handle every step in-house, from assessment and planning to installation and post-project support. Our manufacturer-certified teams work with top-tier materials, including TPO, PVC, and reflective cool roofs, to ensure your building stays protected, efficient, and compliant with all local codes.

If you’re thinking about a reroof this season, start with a conversation. Our team is here to help you make informed, confident decisions about your building’s future.

Ready to take the next step? Schedule your roof consultation with our experts.