Professional Roofing Services Contractor in NYC

Commercial roof repair is the work of fixing damage, leaks, or wear on the roofs of business buildings. These roofs are often flat or have low slopes and are made of materials like rubber (EPDM), metal, TPO, or built-up tar and gravel.Great Ark Construction provides expert commercial roof repair across NYC & Long Island. We specialize in fixing leaks, storm damage, and worn-out flashing on flat roofs (EPDM, TPO, Metal) with minimal disruption to your business. Below are the different types of repair services we provide. Each one is done with quality materials, clear communication, and minimal disruption to your business.

Leak Repair Services

Leaks are the most common roof problem. We find the exact source of the leak—even if it’s far from the drip—and seal it using liquid sealants, patches, or new membrane material. No more buckets or stained ceilings.We use moisture meters and infrared scans to locate hidden leaks deep inside the roof layers. Once found, we clean the damaged area thoroughly and remove any old, cracked sealant or wet insulation. We then apply a high-grade roofing primer followed by liquid rubber, roof cement, or a heat-welded patch made of TPO or EPDM. After the repair, we test the area by running water over it to confirm the leak is completely sealed. All leak repairs come with a warranty for your peace of mind.

Flashing Repair

Flashing is the thin metal or rubber strip around vents, pipes, skylights, and edges. Over time, it can crack or pull away. We reseal, replace, or tighten flashing to stop water from sneaking in around these weak spots.First, we carefully remove all old, dried-out caulk, tar, or roofing cement from around the flashing. Then we inspect the flashing for rust, holes, loose screws, or separation from the roof surface. If the flashing is still in good shape, we reattach it using strong screws and fresh roof cement. If it’s damaged beyond repair, we cut out the old flashing and install brand-new flashing made of galvanized metal, aluminum, or rubber. Finally, we apply a thick, flexible waterproof sealant over all edges and seams to ensure a long-lasting barrier against rain, wind, and snow.

Ponding Water Removal & Repair

Flat roofs often collect water that doesn’t drain. This standing water weakens the roof over time. We clear clogged drains, add tapered insulation to improve water flow, and repair any damage caused by pooled water.We start by inspecting the entire roof to find areas where water sits for more than 48 hours. Then we clear all debris from drains, gutters, and scuppers using high-pressure water jets or manual tools. If drains are broken or missing, we replace them. For low spots that naturally collect water, we install tapered insulation boards that gently slope toward the drains. This allows water to flow off naturally. We also repair any cracks, blisters, or soft spots caused by long-term water exposure. Finally, we apply a heavy-duty roof coating over repaired areas to add an extra waterproof layer.

Patching Holes & Punctures

Storms, falling branches, foot traffic, or rooftop equipment can poke holes in your roof. We cut out the damaged section and bond a new piece of matching material over the hole for a strong, waterproof seal.First, we clean a large area around the hole and remove any dirt, grease, or old adhesive. Then we cut out the damaged roof material in a clean square or circle. We dry the area completely using a heat gun or torch. Next, we cut a patch from the same material as your roof—TPO, EPDM, PVC, or metal. We apply primer to both the roof and the patch, then bond them together using heat welding, roller pressure, or strong adhesive. We seal all edges with a liquid membrane or roof cement. The patch is then rolled firmly to remove air bubbles and ensure a watertight seal that will last for years.

Roof Coating & Restoration

Instead of a full replacement, we apply a liquid reflective coating over your existing roof. This seals small cracks, stops leaks, protects against UV rays, and extends your roof’s life by 5–10 years at a much lower cost.First, we thoroughly clean your entire roof using power washing or sweeping to remove dirt, algae, and loose material. We then inspect for any large holes or major damage and repair those separately. Next, we apply a high-quality primer to help the coating stick. We then spray or roll on a thick layer of acrylic, silicone, or polyurethane roof coating. Silicone coatings are best for ponding water areas, while acrylic works well on sloped roofs. We apply a second coat for extra durability. The coating forms a seamless, rubber-like layer that reflects sunlight, lowers your cooling bills, and stops all small leaks. The entire process takes 1–3 days and costs about half of a full roof replacement.

Gutter & Drain Repair

Clogged or broken gutters and drains lead to water pooling and leaks. We clean out debris, repair cracks, and replace damaged sections so water flows off your roof properly.We start by inspecting all gutters, downspouts, roof drains, and scuppers. We manually remove leaves, dirt, and debris from gutters and use a plumber’s snake or high-pressure water to clear clogged drain pipes. If we find cracks, holes, or rusted sections, we either seal them with gutter sealant or cut out the damaged piece and replace it with new metal or PVC. For roof drains, we remove the strainer, clean out the pipe, and reinstall or replace the drain body and strainer. We check that all downspouts direct water away from your building’s foundation. Finally, we pour water through the system to test for proper flow and make any final adjustments. Proper drainage prevents ponding, leaks, and structural damage.

If you own or run a commercial building and see leaks, pooled water, cracked rubber, or rusted metal, you need commercial roof repair.