An active leak in a commercial building is never just a roofing problem in isolation. It is a threat to your interior finishes, your equipment, your inventory, your electrical systems, and the safety and comfort of everyone who works, studies, or receives services inside your facility. Our leak repair process begins with a thorough diagnostic investigation to trace the true source of the water entry, which on flat commercial roofs is often not directly above where the interior leak is appearing. We use our hands-on expertise and knowledge of commercial roofing system behavior to locate the actual entry point before any repair work begins, ensuring that the repair we perform addresses the real problem rather than just the visible symptom.

A blocked or malfunctioning roof drain system on a flat commercial roof creates standing water conditions that dramatically accelerate roofing membrane deterioration and dramatically increase the risk of a catastrophic roof failure under the weight of accumulated water. Our commercial roof repair service includes inspection and clearing of all roof drains, scuppers, and internal downspouts, repair or replacement of drain components that are cracked, separated, or improperly sealed, and assessment of the overall drainage system design to identify any areas where inadequate drainage is contributing to ongoing roofing problems. Keeping drainage systems fully functional is one of the most important aspects of commercial roof maintenance and repair on Shelter Island's coastal properties.

The roofing membrane is the primary waterproofing layer on flat and low-slope commercial roofs, and it is the component most directly exposed to the UV radiation, coastal moisture, and temperature cycling that Shelter Island's climate produces year-round. Membrane damage can take the form of surface cracks, blistering from trapped moisture, punctures from storm debris or rooftop foot traffic, open seams where heat-welded or adhered joints have separated, and shrinkage splits that develop in aging membrane systems. Our team assesses the extent of membrane damage and determines the most appropriate repair approach, whether that is targeted patch repairs on isolated damage areas or a broader resurfacing treatment for membranes showing widespread surface deterioration.

The seams where membrane panels overlap and bond together are the most structurally vulnerable points of any single-ply commercial roofing system. Heat-welded seams in TPO and PVC membranes can separate over time as a result of thermal movement, substandard original installation, or physical stress from foot traffic or wind uplift. Adhered seams in EPDM systems can lose their bond as adhesives age and degrade under UV exposure and moisture. An open seam on a commercial roof is a direct water entry path that will produce interior leaks with certainty during the next rain event. Our repair team identifies all compromised seams and joints during our diagnostic assessment and re-welds or re-bonds them using materials and methods appropriate to the specific roofing system on your building.

Commercial roofs typically carry a significant number of penetrations including HVAC units, exhaust fans, plumbing vents, electrical conduits, and other mechanical system components, each of which requires properly installed and maintained flashing to prevent water intrusion at those vulnerable junction points. Flashing on commercial properties in Shelter Island faces accelerated corrosion from salt air exposure, and the constant thermal expansion and contraction of metal components causes sealants to crack and pull away from flashing edges over time. Our repair team inspects and reseals all flashing around rooftop penetrations, replaces corroded or severely damaged flashing sections, and ensures that every mechanical system penetration on your roof is properly weatherproofed.

The parapet walls that run along the perimeter of many commercial buildings and the metal edge details that terminate the roofing membrane at the roof's perimeter are among the most leak-prone areas of any flat commercial roofing system. Water finds its way through cracked coping cap joints, deteriorated caulking along parapet base flashings, and separated termination bar seals at roof edges. Our commercial repair team addresses all parapet and edge detail failures with thorough resealing, coping cap repair or replacement, and new termination bar installation where existing edge details have failed beyond what resealing can effectively address.