Commercial roof repair
Commercial roof repair in North Jersey
4.9 stars on Google60+ reviewsFamily-owned12 years of roofing experience
A stained ceiling tile is the last sign of a leak, not the first. We track water back to where it enters, repair it with materials that are compatible with your membrane and give you a photo report you can forward to ownership.
- Registered & insured NJ HIC Reg. #13VH12667100
- Family-owned in North Jersey
- Free written estimates, no obligation
Where flat roofs fail
The usual suspects on a leaking flat roof
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Seams
Welded seams on TPO and PVC can be cold-welded at installation. Taped EPDM seams and torch-applied laps open with age.
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Flashing and terminations
Parapet walls, curbs, pitch pockets and term bars move with the building. Sealant dries out and the flashing pulls away.
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Drains and scuppers
A clogged drain floods the roof. The clamping ring and the flashing around the drain are frequent leak points.
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Punctures
HVAC service calls leave dropped screws, panels and tool marks. Walk pads prevent most of it.
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Wind damage
Loose edge metal lets wind get under the membrane and peel it back.
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Ponding and ice
Standing water ages the membrane, and freeze-thaw cycles work on every weak seam.
Compatibility
Why the right materials matter
Flat roof membranes are not interchangeable. The wrong patch will peel off within a season.
- TPO is repaired with TPO, cleaned and heat-welded. Aged TPO needs to be properly prepared before a new weld will hold.
- PVC is welded with PVC. TPO and PVC cannot be welded to each other.
- EPDM is patched with EPDM, using primer and seam tape or cover strip. Asphalt-based products attack rubber and should never touch it.
- Modified bitumen is repaired with compatible mod-bit sheets, torch-applied, cold-applied or self-adhered to suit the existing roof.
The first thing we do on any repair call is identify what is on your roof.
Process
How a commercial repair call works
Call or send the form
Tell us where water is showing up inside and how to get roof access.
Leak investigation
We inspect inside and on the roof and photograph what we find.
Temporary dry-in if needed
If the permanent repair needs dry weather or special materials, we stop the water first.
Permanent repair
Matching membrane, proper preparation and correct seaming.
Photo report
Before and after photos plus notes on anything else the roof will need soon.
Recent work
Recent commercial roof repairs
Real photos from ProTech repair calls: a rooftop unit re-flashed in EPDM, an exhaust fan curb rebuilt in TPO and a pipe penetration re-flashed on a white membrane roof.
Leak at a rooftop unit: the curb area re-flashed with a new EPDM section, sealed into the existing roof. 
An exhaust fan curb rebuilt in TPO, with welded patches at every corner. 
A pipe penetration re-flashed with a TPO boot and target patch, welded to the field membrane.
Maintenance
Most commercial leaks are preventable
Roof manufacturers expect regular inspections, and many warranties require them. What a visit covers depends on the roof’s condition and your requests. It can include:
- Clearing drains, scuppers and gutters
- Checking seams, flashing, pitch pockets and sealant
- Looking for punctures around rooftop units and along service paths
- Re-securing loose edge metal and coping
- A photo report with anything that needs budgeting for
Questions
Commercial roof repair questions
Will a repair void my roof warranty?
It can if it is done with the wrong materials or by an unapproved contractor. If your roof is under a manufacturer warranty, tell us before we start. The manufacturer often needs to be notified, and the repair must follow their details.
How do you find a leak on a big flat roof?
We start where the water shows inside, then work uphill on the roof to penetrations, seams and flashing. When the source is not obvious, we use core cuts and moisture readings to find wet insulation and trace it back.
When does repairing stop making sense?
When the insulation is wet across a wide area, the membrane has become brittle, or you are paying for repairs every few months. At that point a replacement costs less over five years than continued patching.
Is a commercial roof repair warranted?
Yes. Every permanent repair comes with a minimum 2-year workmanship warranty on the repaired area, in writing, and some repairs get a longer warranty, depending on the age and condition of the roof. Temporary dry-ins and emergency patches are not covered. New materials also carry the manufacturer warranty where it applies.
Related services
Leak over a tenant or your stock?
Call now. We will stop the water and document everything.