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Flat roofs and low-slope commercial structures need systems built specifically for them. Shingles aren’t the solution here. The roofing membrane varies depending on the building type, roof size, and similar factors. We install and repair four main commercial roofing systems.
The majority of commercial roofs in New Jersey are covered with a white TPO membrane. The surface reflects sunlight rather than absorbing it, thereby reducing cooling costs in summer. TPO is the most likely system for office buildings, retail and flat commercial buildings.
EPDM is a rubber roofing material that has been used on commercial roofs for years. The material is flexible in cold weather, important for freeze-thaw conditions. In multi-unit and industrial buildings, EPDM is used to provide a greater span with fewer seams, which means there are fewer points of water entry.
There are two layers of modified bitumen: first the base sheet is laid, then the cap sheet is applied using torch or cold adhesive. The result is a thickened, strength-enhanced membrane that can withstand foot traffic. This is a concern for retail and warehouse roofs, where HVAC staff routinely walk to maintain them.
Metal roofing lasts longer, but it costs more upfront. A commercial metal roof with a standing-seam design should last 40-60 years and require little maintenance during that period. Snow slides off, water drains quickly, and it requires less frequent inspection than membrane systems.
Commercial roof damage builds slowly, then shows up all at once. Here are the warning signs our inspectors look for most.
Water still sitting on the roof two days after rain means drainage isn’t working, and it’s already getting in.
Bubbles in the membrane mean moisture has already worked its way underneath it.
Seams that lift or pull apart create openings for water, even when they look minor from the ground.
Staining around HVAC units or drains means water is already moving through the structure.
Flashing that’s cracked or shrunk away from HVAC units and vents leaves an open path for water.
A section that gives slightly underfoot usually means the deck below has already started to rot.
A commercial roof takes on more than most property owners think about. It carries rooftop HVAC units, handles water pooling on low-slope sections, and sits under constant sun exposure. Through it all, it still has to keep the building dry underneath. When a leak finally shows up inside, the damage has usually been building for months.
At USA Roofing & Chimney, we start with a full inspection of the roof deck and membrane. We inspect the insulation for wet or soft spots and check seams for early signs of failure. We also inspect drains, parapet walls, and rooftop units for stress points where water tends to collect. Once we know what’s going on, we can tell you what the roof needs: a repair, a section replacement, or a full system replacement.
Most commercial roof repairs run between $500 and $5,000, depending on the extent of the damage and the roofing system involved. A full roof inspection gives you an exact number before any work begins.
Isolated issues like a raised seam, minor ponding, or a small membrane blister usually just need a repair. Once damage spans a large section of the roof, or repairs start piling up, replacement becomes the more cost-effective option. We’ll always walk you through which situation you’re in before recommending either one!
Most commercial roof replacements take 1 to 2 weeks, depending on the size of the building and the system being installed. Larger industrial roofs or occupied buildings that need phased work can take longer.
TPO is the most common choice for flat commercial roofs, thanks to its reflectivity and lower cost. EPDM or modified bitumen may be a better fit for industrial buildings or roofs with heavy foot traffic.
Yes, in most cases repairs and even section replacements can be done while the building stays open. We plan the work around your operating hours whenever possible to minimize disruption.
Get a free commercial roof inspection before a small leak turns into a costly repair. Call us today for reliable commercial roofing services!