EM Construction provides fast, reliable roof leak repair services for residential and commercial properties throughout New York and New Jersey. When a roof is leaking, every hour counts — active leaks damage interiors, destroy finishes, compromise structural components, and create ideal conditions for mold growth. Our crews mobilize quickly, diagnose the source accurately, and deliver durable repairs that stop leaks for good.
Roof leaks are rarely straightforward. Water enters at one point and may travel significant distances along roof membranes, decking, or structural framing before appearing as a stain on an interior ceiling or wall. Misdiagnosing the source of a leak leads to repairs that don’t solve the problem. EM Construction uses systematic investigation techniques — including visual inspection, water testing, and infrared moisture scanning where warranted — to find the true source before any repair work begins.
Our Roof Leak Repair Services
Emergency Leak Response
When a roof is actively leaking, we respond with priority scheduling to stop the water intrusion as quickly as possible. Emergency repairs may include temporary tarping, application of emergency patch materials, or targeted permanent repairs depending on conditions.
Flat Roof Leak Repair
Flat and low-slope roofs — including modified bitumen, TPO, EPDM, built-up, and coating systems — are subject to specific failure modes: membrane blisters, seam separations, punctures, drain blockages, and failed flashings. We identify the specific failure and apply the appropriate repair for each system type, using compatible materials specified by the membrane manufacturer.
Flashing Repair & Replacement
Failed flashing is the most common cause of roof leaks. Flashing at parapet walls, chimneys, skylights, HVAC penetrations, drain sumps, and roof-to-wall junctions must be maintained in perfect condition to prevent water entry. We remove failed flashing and install new lead, aluminum, copper, or self-adhering membrane flashings with proper laps and seals.
Drain & Scupper Clearing & Repair
Blocked roof drains cause ponding water that places enormous stress on the roof membrane and can lead to structural failure in extreme cases. We clear clogged drains and scuppers, repair damaged drain bodies, and install drain extensions where required to achieve positive drainage.
Modified Bitumen Patch Repairs
Tears, blisters, or punctures in modified bitumen membranes are repaired with torch-applied or cold-applied patches that are fully bonded to the surrounding membrane, creating a seamless, watertight repair.
TPO & EPDM Membrane Repairs
Single-ply membrane defects — punctures, tears, and failed seams — are repaired using manufacturer-approved patch materials and heat-welding (TPO) or adhesive bonding (EPDM) techniques to restore the membrane’s continuity.
Roof Coating Touch-Up & Renewal
Roof coatings that have thinned or failed in specific areas can be touched up with compatible coating material. Where overall coating thickness has degraded, a full re-coat may be the most cost-effective long-term solution.
Skylight & Rooftop Penetration Sealing
Skylights, vent pipes, HVAC curbs, and equipment supports are all potential leak points where flashing and sealants must be maintained. We re-flash and re-seal all penetrations as part of a comprehensive leak repair scope.
Parapet & Coping Joint Repairs
Failed sealant joints in coping and parapet wall assemblies are a primary source of water infiltration into the building interior. We repoint mortar joints, replace failed caulk, and re-flash parapet bases as part of our leak repair service.
Leak Investigation Process
Accurate leak diagnosis is the foundation of effective repair. Our investigation process includes:
1. Interior Inspection — We examine water staining patterns on ceilings and walls to map the possible water path from entry point to manifestation.
2. Roof Inspection — We conduct a systematic inspection of the entire roof surface and all penetrations, drains, and perimeter edges.
3. Focused Water Testing — In cases where the source is unclear, targeted water testing — directing water from a hose at specific suspected areas — isolates the entry point.
4. Infrared Scanning — For large flat roofs, infrared (thermal) scanning identifies wet insulation beneath the membrane by detecting temperature differences, allowing precise targeting of repairs without removing the entire membrane.
5. Source Confirmation — We confirm the identified source before beginning repairs to ensure the solution addresses the actual problem.
Why Temporary Fixes Are Not the Answer
Roof cement, tar patches, and tarps are temporary measures that may stop a leak for a season but do not address the underlying failure. Permanent repairs using appropriate materials and methods are the only sustainable solution. EM Construction performs repairs designed to last — not just to get through the next rain.
Service Areas
EM Construction provides roof leak repair services throughout all five New York City boroughs, Long Island, Westchester County, and northern New Jersey.
Get a Free Estimate
A leaking roof requires immediate attention. Contact EM Construction today for rapid response, accurate diagnosis, and durable repair of your roof leak.