Commercial Roof Replacement in PA, NJ, DE, & MD

Expert Commercial Roof Replacement

Many complexities come along with an industrial or commercial roof replacement, including keeping the building dry and managing fumes, dust, and noise.

Keeping your building and its contents — as well as employees, visitors, residents, and passersby — safe should be of paramount importance to your roofing contractor. We understand these potential complications and will help you make the best roofing decision for your needs and budget.

GSM Roofing: Your Guide to Commercial Roof Replacement Done Right

The experienced team at GSM Roofing will not only replace your commercial roof, but we’ll also guide you through the entire process — from selecting a material to setting up a commercial roof maintenance plan to ensure it lasts as long as possible.

Long after your roof replacement, we’ll continue to provide repair and maintenance services to prevent leaks and extend its lifespan. In many cases, this replacement could be the last one you’ll ever need.

We are a Versatile Commercial Roof Replacement Contractor

Our crews are highly skilled in installing a wide range of commercial roofing systems, including but not limited to the following.

Commercial metal roof at the Dantchik Gallery

Metal Roofs

These roofs come in pre-manufactured and custom varieties — both of which we can utilize in metal roof replacement applications. Custom metal roofing includes projects like zinc panels and standing-seam copper. Pre-manufactured metal roofs are also very versatile, offered in color and style choices you can use to make your building stand out or blend in.

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Slate roof on Leeds Hall at Haverford College

Slate Roofs

Green Slate roofs aren’t just something we’re qualified to do — we do it so well that we’ve helped write the National Slate Association’s updated slate installation manual. We bring this expertise to every commercial slate roof replacement for historical buildings or for modern facilities where a historical look is desired.

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Tile roof on Founders Hall at Cabrini College

Tile Roofs

Tile roofs can be beautiful and very reliable if installed correctly by a commercial roofing contractor with decades of experience working with various sizes, colors, and shapes of tiles. This material offers numerous benefits, including fire and water resistance, exceptional durability, long-lasting performance, and cost-effectiveness over time.

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Cedar roof at Penn State University Abington

Cedar Roofs

These roofs are in high demand, and so are contractors with the experience and know-how to replace them correctly. Our team can expertly handle a replacement, whether it involves plywood with a cedar breather or traditional lathe. We ensure the proper installation of metal ridge caps, flashings, and valleys to deliver a durable and high-quality result.

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Green Roofs

Green roofs decrease heating and cooling costs, increase energy efficiency, and reduce your carbon footprint. Varieties include cooling roofs, advanced insulations, vegetative roofs, solar (photovoltaic) roofs, rainwater harvesting, LEED (Leadership in Energy and Environmental Design), and daylighting designs.

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Shingled Roofs

Shingle roofs perform best when installed by a contractor with decades of experience in the highly variable nature of the materials and the correct installation of each type of shingle. We will supply high-quality shingles that deliver great value and install them with the utmost workmanship.

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Modified Bitumen and Slate Roof at Haverford College

Built-Up Roofing Systems

This is one of the most common roofing solutions for low-slope roofs, and we’ve been conducting these types of commercial roof replacements since 1946. To meet your specific needs, we’ll help you choose the best application process – whether cold-applied or hot-mopped, smooth-coated or gravel-surfaced, and modified or traditional bitumen.

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Commercial single-ply roof at Bryn Mawr College

Single-Ply Roofs

These replacements come with heat-welded or glued seams, black or white membranes, mechanically attached or adhered, and other options, including EPDM, PVC, and TPO. Each of these has benefits and drawbacks, dependent upon your commercial application.

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Roof Replacement for Cecil County Building

GSM Roofing completed a full roof replacement for a vital Cecil County building that houses Amedisys Hospice Care, the Sheriff’s Department, and the 911 emergency call center.

The project included installing 0.5” insulation for improved thermal performance and fully adhering a .060 black EPDM membrane to ensure a watertight seal. We reworked scuppers and drains, re-flashed all curbs and penetrations, and installed pourable sealer and pockets around HVAC and electrical lines. The team also coordinated the safe reinstallation of the lightning protection system and finished the project with custom-fabricated .040 aluminum coping with a Kynar finish for a clean, durable edge.

A Great Commercial Roof Replacement Starts with the Right Roofer

Choosing the right contractor is just as important as selecting the best roofing system for your industrial or commercial roof replacement. With decades of experience since 1946, a full range of manufacturer affiliations and certifications, and a reputation for taking on the toughest roofing challenges, we’re here to make the process seamless. Serving Pennsylvania, New Jersey, Delaware, and Maryland, our team will guide you every step of the way to ensure you make the best decision for your building. Get in touch with us today to discuss your project.

Roof Replacement FAQ

What are Common Signs that a Roof Replacement might be Necessary?

Sagging areas: visible sagging or uneven sections on the roof may signal structural damage or weakened supports
Damaged flashing: cracked or deteriorated flashing around vents, chimneys, or skylights can compromise the roof’s integrity
Storm damage: Severe weather (such as hail, wind, or falling debris) can cause significant roof damage
Persistent leaks: repeated or widespread leaks that repairs haven’t resolved may require a full replacement
Water stains: discoloration or stains on ceilings and walls inside the building often point to roofing problems
Moss, mold, or algae growth: excessive growth can weaken the roof over time and indicate underlying issues
Age: If the roof is nearing or has exceeded its expected lifespan, it’s likely time for a replacement
Rising energy bills: Poor insulation and roofing materials can lead to higher energy costs

What are the Benefits of a Commercial Roof Replacement?

Structural integrity: a new roof eliminates vulnerabilities (such as leaks and structural weaknesses) and ensures the roof meets current building codes and safety standards
Safety: newer materials are designed to withstand harsh weather conditions
Energy efficiency: modern roofing materials improve insulation and reduce heating and cooling expenses, and you can select sustainable materials or install features, like green roofs, to reduce your environmental impact
Long-term cost savings: a new roof requires fewer repairs, and advanced materials and proper installation increase the roof’s longevity
Aesthetics and market value: it can enhance the overall look of a building and also boost the property’s market value

How Long does a Roof Replacement Take?

The timeline for a roof replacement varies depending on several factors, including weather conditions, the size of the roof, the complexity of the roof, and the roofing material. But most projects can take anywhere from a few days to several weeks.

Is it Cheaper to Repair a Roof instead of Replacing It?

Yes — in most cases, repairs are less expensive upfront than a full replacement. A patch, sealing, or partial repair can extend the life of your roof and resolve localized issues at a lower cost.

However, if your roof is nearing the end of its expected lifespan or has widespread damage, repairs may only serve as a temporary fix. In these situations, repeated repairs can quickly add up and become more expensive than investing in a full roof replacement.

Can you Describe the Process for Replacing a Roof?

Initial inspection and planning: the roof is inspected, and a detailed proposal is created, including recommendations, costs, and timelines
Preparation: permits are obtained, schedules are coordinated, and safety measures are implemented
Old roof removal: the existing roof is removed, and debris is cleared
Roof deck inspection: the deck is assessed and repaired if necessary to provide a solid foundation
New roof installation: protective layers are added, and the chosen roofing material is professionally installed
Finishing touches: sealants, coatings, and details (like flashing) are applied, followed by a thorough site cleanup
Final inspection: the roof is inspected for quality
Ongoing support: maintenance plans are available to ensure the roof’s longevity

Can I Switch to a different Roofing Material?

Yes, you can switch to a different roofing material during a commercial roof replacement, but it requires careful planning. Factors (like the building’s structural compatibility and the intended use of the property) must be considered to ensure the new material meets performance needs. Heavier materials– like slate or tile – may require structural reinforcement.

Additional considerations include budget, durability, and compliance with local building codes. Switching materials can also be an opportunity to enhance your building’s appearance and efficiency.

How Long can I Expect my Replaced Roof to Last?

The lifespan of a replaced commercial roof depends on several factors, including the materials used, installation quality, climate, and maintenance.

How do I Maintain my New Commercial Roof to Ensure its Longevity?

Proper maintenance is key to ensuring the longevity of your new roof. It’s important to schedule regular roof inspections, keep it clean, trim nearby trees, and address repairs promptly.