Commercial Roofer Serving PA, NJ, DE, & MD

Experienced Commercial Roofing Contractors with Long-Lasting Solutions

When it comes to commercial roofing, choosing a contractor who delivers top-quality services is key to protecting your investment. Our team not only focuses on providing solutions to help you save money in the long run, but we also prioritize integrity, communication, and safety to minimize risks.

Commercial and Specialty Roofing — It’s All We Do

At GSM Roofing, we specialize in commercial jobs. And we welcome custom, specialty work.

When you choose a contractor who can meet every one of your commercial roofing needs, you’ll feel confident in the integrity of your roofing systems — and unlimited in your choice of roofing materials. We can handle slate, tile, metal, and more!

Maintenance

When you hire industrial roofing contractors to inspect your roof twice a year — as well as respond to emergency leaks — you can expect your commercial roof to last. We can help you protect your business and its valuable property.

Discover Roof Maintenance

Commercial Roofing

Whether you need a roof replacement or new construction, GSM Roofing has it covered. We can handle all types of commercial systems, including single-ply, built-up, and shingle roofs. We also have several green roof systems that can help reduce energy consumption.

Learn About Our Installation Services

special cottage roofing penn state abington

Specialty Roofing

Your project might include multiple buildings at multiple locations or a variety of roofs and systems. That’s okay because they’re no match for the expanding expertise of our specialists. Challenging, custom, and daring jobs are at the heart of our business.

Explore Specialty Roofing

Schedule a Free Commercial Roof Inspection

Ensure your roof is in top condition with our free commercial roofing inspection, featuring advanced drone and infrared technology. Our expert team will identify hidden issues before they become costly repairs.

Schedule an Inspection

The GSM Roofing Difference

Over 100 Members in the 25-Year Club!

Our industrial and commercial roofing contractors are more than long-term employees. They are integral parts of our client relationships. One look at the 25-year wall in our office, and it becomes clear just how important our people are to our success and yours.

The expert, tenured, long-term commercial roofers we are proud to employ can solve any roofing problem. Our customers’ trust in them has led to our company’s longevity. When you need professionals who are focused on safety, doing their work the right way, and communicating with one another and customers with clarity, trust the team at GSM Roofing.

Trusted Expertise and Commitment to Excellence

Family-owned and operated for three generations

Home to some of the most experienced specialty roofing contractors in the industry

Invested in the community and in our people

Our team is able to install, maintain, service, and repair hundreds of different types of roofing systems from countless manufacturers, and we provide emergency repairs 24/7/365. With GSM Roofing, you’ve got the last commercial roofer you’ll ever have to hire.

We work in all types of weather, never sacrificing craftsmanship or the safety of our employees and the people on your property. No leak is too difficult; no slope is too steep. We don’t shy away from the dirty, the dangerous, or the difficult.

GSM Roofing: Working and Giving in Your Community

We’ve been installing, replacing, and maintaining roofs in Pennsylvania, New Jersey, Delaware, and most of Maryland for nearly 80 years. Over those 8 decades, we have not only built a reputation for quality, professional, safe roofing, but we have also built relationships with area businesses and charitable organizations.

Through philanthropic programs like the Great Roof Giveaway, we are giving back to non-profits in the areas we serve every year. We will continue to spearhead these programs because we believe in long-term relationships — not only with our valued clients but also in the communities where we work.

If you have questions about our company or any of our commercial roofing services, get in touch with us today.

What Our Customers Say

It has been a pleasure doing business with you and your company! All of our contacts with your workers have been very positive! Eric was always willing and able to answer any questions that we had on site. I also appreciated your availability and prompt responses to all our questions!
Linda Good, Maytown Reformed UCC

I want to express my appreciation for the outstanding project your company recently completed at the Roxanna Cannon Arsht Surgicenter……we look forward in working with your organization in the future.
Robert Hall, Tremco Roofing and Building Maintenance

This was one of the best contractor processes I have ever had. Aside from GSM’s expertise in working with a difficult material, they really understood the installation process. From scheduling and staging of materials to maximizing productivity and staffing to meet our demanding deadline, GSM was excellent. Not only do they know specialty roofing they went above and beyond to respect the sensitivity to the building and always worked to minimize the negative impact of working on a occupied building.
Elizabeth Nastor, Cabrini College

LancasterHistory is grateful for the work and care provided by GSM Roofing at Wheatland. As an historic mansion, and the home of Pennsylvania’s only United States President, Wheatland required special attention, down to the smallest detail. It’s a delight to look up and see the new roof and know that Mr. Buchanan would be proud.
Robin Sarratt, Vice President, LancasterHistory

GSM provides leak service and other maintenance to several of our properties. They’re fast and responsive. The GSM website and customer portal have been a huge benefit, assisting Emory Hill property managers in quick and efficient leak reporting.
Colleen Corrado, Commercial Property Manager, Emory Hill

Our Service Area

Our service area includes New Jersey, Delaware, Maryland, and Pennsylvania, with a strong local presence in Lancaster County and Chester County as well as Cecil County in Maryland. Whether you’re in a major metro area or a smaller community, we’re proud to offer reliable, professional service tailored to your needs.

Nittany Lion Inn Roof Restoration

GSM Roofing restored the historic Nittany Lion Inn in State College, PA, by replacing the existing slate with EcoStar Majestic Synthetic Slate on its steep-sloped mansard roofs. The project maintained the inn’s classic look while offering a durable, cost-effective solution. GSM was chosen for its expertise in synthetic slate, safety standards, and commitment to quality craftsmanship.

View Our Projects