Commercial Roof Repair
Commercial roof repair starts by tracing a leak back to where the water actually gets in, then fixes what failed, whether that’s a drain, a parapet, a seam or the flashing at rooftop equipment. QRS repairs commercial roofs across Los Angeles and Orange County while your building stays open, with before-and-after photos of every repair.
Overview
On a low-slope roof, water seldom drips straight down from the spot where it enters. It can slip under a lap, travel along the deck and show up over a different office, aisle or bay, which is why a patch above the stain so often fails. We check the likely entry points first: seams and laps, flashing at rooftop units and pipe penetrations, drain bowls, scuppers and the base of parapet walls. Once we find the cause, we make a targeted flat roof repair that ties into the existing modified bitumen or other low-slope system.
Repairs on an occupied building have to fit around the people inside. Before we go up, we confirm roof access, where the water shows inside and whether anything below needs protecting, and the building stays open while we work. Every repair is photographed before and after, so owners, property managers and tenants all see what failed and how it was fixed. If the survey shows wear across the whole roof, we’ll tell you plainly, and those photos become the starting point for planning a commercial roof replacement.
Compare All Roof Repair Options →Our Process
How a commercial roof repair works
Leak report and history
We start with what you know: where water shows up inside, when it happens and what has been patched before.
- Interior stains and drip locations
- Leaks tied to heavy rain or wind
- Past repairs and patches
Tracing on the roof
A roofer works back from the leak area, checking every detail that could feed it and photographing what we find.
- Seams, laps and blisters
- Curbs and flashings at rooftop equipment
- Drains, scuppers and parapet walls
Written repair scope
You get a written scope and price for the repair, plus a note on anything else we saw that’s worth watching.
Repair, scheduled around occupants
We agree on timing, access and noise with you or your building contact, then make the repair while the building stays open.
Before-and-after photos
Photos of the problem and the finished repair come to you, ready to share with owners and tenants or to keep in your maintenance files.
Why Choose QRS for Commercial Roof Repair?
A repair is only as good as the diagnosis behind it. Request an estimate and a roofer will come out to find the real cause, anywhere in Los Angeles or Orange County.
Diagnosis before patching
We don’t smear on sealant and hope. The repair goes where the water actually gets in, and the photos show it.
Repairs that suit your roof
We repair with materials compatible with the existing system, so the patch ties in cleanly instead of becoming the next weak spot.
One record for everyone
Before-and-after photos and a written scope give owners, managers and tenants the same clear picture.
Straight talk on repair vs. replace
When patching no longer makes financial sense, you’ll hear it from us, with photos of the roof’s overall condition to back it up.
Frequently Asked Questions
Straight answers about commercial roof repair.
Can you repair storm damage on a commercial roof?
Yes. When Santa Ana winds or a winter storm damage the roof or start a leak, call us: a roofer assesses and photo-documents the damage and adds temporary protection if it’s needed to limit further water damage. The permanent repair follows with a written scope and price, and our photos and scope can be shared with your insurance company. Learn more about emergency and storm-damage roof repair.
Our roof drain keeps backing up. Is that a roofing problem?
Often, yes. Debris can clog the strainer, the flashing around the drain bowl can fail, or low spots can keep water from reaching the drain at all. We check all three and repair the roofing side, and if the blockage is deeper in the drain line, we’ll tell you so a plumber can clear it.
Will you need access inside the building?
Sometimes. Seeing where water shows up inside helps us trace a leak, so we may ask to look at a ceiling or the area under a drain. Most repair work happens on the roof, and we’ll arrange any interior visit with you ahead of time.
Can you send the repair details to our owner or tenants?
Yes. Along with the written scope, you get before-and-after photos and a plain-English note on what failed and what we did. It’s easy to forward to ownership, file with your building records or share with the tenant who reported the leak.
How can we keep the next leak from happening?
Most commercial leaks start at details that wear gradually, like a drain that collects debris or sealant that dries out in the sun. Scheduled commercial roof maintenance catches those early and ends each visit with a photo report. If a repair is due, you’ll see a written price first.
Tell us what you need.
Two minutes. A clear next step. No pressure.
Get a Straight Answer on commercial roof repair
Tell us about the building. A roofer, not a salesperson, walks the roof and gives you a clear next step on commercial roof repair, with a written scope and price.
- CSLB licensed, bonded & insured
- 10-year workmanship warranty
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