Commercial Roof Leak Repair Near Me in New Jersey

Commercial leaks almost never come from one obvious hole. They come from failed seams, pitch pockets, terminations and flashing details that have been moving water sideways for months before anything shows on a ceiling tile below. The water travels along insulation joints, across the flutes of a metal deck and down the inside of curb bases, then drops wherever it finds an opening. That is why the stain inside is a poor guide to the entry point outside, and why chasing the visible drip is the single most common reason a roof keeps leaking after it has been repaired more than once.

Finding the actual source is a diagnostic job with its own methods. A flood test dams and floods an isolated section so the water finds the opening for you, which works well on a small area and poorly on a large roof. Infrared thermography is run after sunset, when dry insulation has released its heat and saturated insulation is still radiating, so wet areas appear as warm patches. Electronic leak detection puts a charge across the membrane and locates breaches by where the current reaches the deck, which picks up pinholes and small punctures no walk-over will catch. Core sampling cuts a plug to confirm what a scan indicated. Which method fits depends on roof size, membrane type, and whether there is enough moisture and temperature difference for a scan to read at all.

Repairing the leak correctly depends on knowing which system you are working on. TPO and PVC seams that were welded badly will hold for a season and then split the first time temperatures swing hard. EPDM pulls away at parapets and curbs as it shrinks with age. Modified bitumen usually needs torch applied or cold adhesive patching matched to the existing ply rather than a generic self-adhesive patch that will not bond over the long run. Built-up roofs need their own approach at blisters and splits. Using the wrong material or method can also void whatever manufacturer coverage is left on the roof, so where a warranty is still live the repair follows that manufacturer's specified method.

Drainage is behind a large share of repeat leaks. Water standing on a low-slope roof for more than 48 hours after rain is the standard definition of ponding, and past that point it accelerates membrane breakdown, loads the deck and works into any seam already starting to open. Plenty of older buildings were built with drains and scuppers sized for different rainfall assumptions than we work with now. Patching a leak without correcting slope or clearing the drainage buys a few months before the same low spot fails again, usually a short distance from the last patch.

Rooftop equipment added after the original installation is another steady source. Solar conduit runs, satellite mounts, equipment stands and replacement HVAC curbs frequently get fastened straight through the membrane without being flashed into the system properly. Every service visit by a mechanical contractor is another opportunity for a nick or disturbed sealant. On buildings where several tenants share rooftop access it is common to find penetrations nobody in the building was aware of.

When the water is actively coming in, the first job is stopping it rather than finishing a repair. That means tarping, temporary sealing at the failure point, and clearing blocked drains so the water has somewhere to go. Photographs and written notes taken at that moment are what an insurer will ask for later, and they cannot be recreated once the tarp is down. The permanent repair follows once the weather has cleared and the full extent of the damage is visible.

Commercial Roof Leak Repair Services We Offer

How it works

1. 1

   Interior and roof walk

   We start inside, matching stains and drip locations against the rooftop details directly above and around them, then walk the entire roof rather than the area over the stain. Seams, laps, terminations, pitch pockets, pipe boots, drain bowls, parapet caps and every curb get checked, along with any previous patch work.

2. 2

   Leak detection

   Where the source is not visible, we select a method that suits the roof: a flood test on an isolated section, an infrared scan after sunset to locate wet insulation, or electronic leak detection to find breaches the eye cannot see. Core samples confirm what the scan indicated before anyone cuts a larger opening.

3. 3

   Emergency stabilization where needed

   If the water is actively entering the building, tarping and temporary sealing go in before anything else, and blocked drains get cleared so the water has an exit. Damage gets photographed and documented at this point for your insurer.

4. 4

   Written findings and options

   You get a written explanation of what is failing and why, how far the water has travelled, whether insulation is saturated, and whether a targeted repair or a wider fix is the sensible answer. Where a moisture survey shows a large percentage of the roof is wet, we will say that rather than sell a patch.

5. 5

   Repair

   The repair uses materials and methods compatible with the existing system, following the manufacturer's specification where a warranty is still in force. Saturated insulation gets cut out and replaced so the new work sits on a dry substrate. Drainage corrections happen at the same time where they are part of the cause.

6. 6

   Verification and documentation

   The repaired area and the surrounding drainage get tested to confirm water moves off the roof rather than sitting on the new work. You receive photographs and notes covering what was found and what was done, which is useful for an insurance file or simply for the roof's history.

Pricing

Leak repair is priced after an on-roof inspection, because access, membrane type, how far the water has spread and whether insulation has to come out all change the number. A single failed seam on an accessible roof sits at the low end. A leak that needs a moisture survey to locate, or that has saturated insulation around it, costs more because the wet material has to be cut out before anything new goes down. Detection work is quoted separately from the repair itself, so you can see what the diagnosis costs before committing to the fix.