How long does a commercial flat roof last?

A well-installed commercial flat roof lasts 20 to 30 years depending on the material. TPO and EPDM systems typically last 20 to 25 years, while modified bitumen can reach 30 years with proper maintenance. Regular inspections and a preventive maintenance plan are the most effective ways to maximize lifespan and avoid premature failure.

What is the best roofing material for a commercial building?

TPO is the most popular commercial roofing material due to its excellent energy efficiency, durability, and cost-effectiveness. EPDM is preferred for its longevity and low maintenance. The best choice depends on your building's size, location, energy goals, and budget. We evaluate these factors during our free assessment to recommend the ideal system.

Can you install a new commercial roof over the existing one?

In many cases, yes. If the existing roof has only one layer and the decking is structurally sound, an overlay can save 25 to 40 percent compared to a full tear-off. However, local codes typically limit the number of layers, and moisture trapped beneath the old roof must be addressed. Our core sampling process determines whether an overlay is viable.

Commercial Roofing

Minimize downtime with expert commercial roofing services for flat roofs, metal systems, and multi-unit properties.

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20+ Years

1,000+ Roofs

5★ Rating

Licensed in 14 States

Why Commercial Roofing Matters

A failing commercial roof does not just leak — it disrupts your business operations, damages inventory, creates liability risks, and drives up energy costs. Every day of delay compounds the problem.

Commercial properties demand roofing solutions that minimize business disruption, meet code requirements, and deliver long-term performance on tight budgets. ProTech Roofing provides full-service commercial roofing for retail centers, office buildings, warehouses, and multi-family properties. We specialize in TPO, EPDM, and modified bitumen flat roof systems as well as standing seam metal for industrial applications.

Our project managers coordinate work around your business hours, ensure OSHA compliance, and deliver projects on schedule. Preventive maintenance programs extend roof life and protect your investment for decades.

Do You Need Commercial Roofing?

If any of these apply to you, it may be time to take action.

Your flat roof is 15 or more years old
You notice ponding water that does not drain within 48 hours
Energy costs are rising without explanation
You see bubbling, blistering, or membrane separation
Your building has a history of recurring leaks

Benefits of Our Commercial Roofing

Why homeowners trust ProTech Roofing for their commercial roofing needs

Flexible scheduling including nights and weekends to minimize business disruption

TPO, EPDM, modified bitumen, and metal roof system expertise

Preventive maintenance programs that extend roof life by 10 to 15 years

OSHA-compliant crews with commercial liability coverage

Manufacturer warranties up to 30 years on qualifying commercial systems

Get a Free Commercial Roofing Quote

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Our Commercial Roofing Process

A clear, step-by-step approach from start to finish

Property Assessment & Core Sampling

We evaluate your existing roof system with core samples, moisture scans, and structural analysis to determine whether repair, overlay, or full replacement is the most cost-effective solution.

Detailed Proposal & Scheduling

You receive a comprehensive proposal outlining scope, materials, timeline, and pricing. We coordinate the installation schedule around your business operations to minimize disruption.

Professional Installation

Our commercial crews execute the project using manufacturer-specified methods, maintaining a clean and safe work site throughout. Daily progress reports keep you informed.

Final Inspection & Maintenance Plan

After passing all inspections, we provide complete warranty documentation and recommend a preventive maintenance schedule to maximize the life of your new roof system.

When to Call Us

Do not wait for the problem to get worse — contact us if you notice any of these warning signs.

Active leak during business hours threatening equipment or inventory

Code violation notice requiring roof upgrades

Lease renewal requiring a roof condition report

Planning a building sale or refinance that requires inspection

Materials We Use

Premium products from trusted manufacturers

TPO (Thermoplastic Polyolefin) single-ply membrane

EPDM (Ethylene Propylene Diene Monomer) rubber membrane

Modified bitumen multi-ply systems

Standing seam metal panels for industrial applications

Spray polyurethane foam (SPF) insulation and coating

Our Warranty Promise

Commercial roof systems include manufacturer warranties up to 30 years on qualifying installations, plus our own workmanship guarantee. Preventive maintenance programs are available to maximize system life.