Office Building Roofing
QRS provides office building roofing across Los Angeles and Orange County, from leak repairs to full replacement, with the work planned so your tenants can keep working. Every project starts with a roof survey that traces leaks to the source, from rooftop HVAC curbs to parapets and drains, with photo-documented findings for owners and property management clients.
Overview
Office building roofing is detail work. Most office roofs are low-slope and crowded with HVAC units, exhaust fans, conduit and roof hatches, and many are ringed by parapet walls capped with coping. Each of those details is a place water can get in, and the first sign is often a stained ceiling tile in a top-floor suite. We follow the leak to its source, whether that’s a failed curb flashing, a split seam or a drain backing up, then repair or replace the flat and low-slope roofing with the right system for your building.
For commercial clients, the roof is also a planning question. Is it worth repairing, or is replacement coming? What needs attention this year, and what can wait? Our roof survey answers with photos and plain-English findings you can share with ownership or keep with your building records. When larger work is due, we build the scope and work plan around your tenants, covering roof access, noise, staging and deliveries.
Our Process
How an office roof project works
Roof survey
A roofer walks the roof, checks the areas your tenants have reported and photo-documents what we find.
- Curbs and flashings at HVAC units
- Drains, scuppers and low spots
- Parapet walls and coping
Written scope and tenant plan
The scope and price come in writing, along with a work plan built around your tenants and the way the building runs.
- Roof access and material hoisting
- Noisy work and quiet hours
- Staging areas and tenant updates
Installation
Crews work through the agreed scope area by area, keeping entrances, walkways and loading areas clear.
Closeout photos and records
We walk the finished roof with your property manager or building engineer and share photos of the completed work for your files.
Ongoing roof care
Scheduled checks keep drains clear and catch worn flashings early, with photos you can compare from one visit to the next.

Why Choose QRS for Office Building Roofing?
Property management clients juggle tenants, ownership and budgets. A roof survey gives you facts and photos to work from.
Leaks traced, not guessed at
We follow water back to where it enters instead of patching the spot above the stain, and we show you the photos.
Findings ownership can follow
Plain-English findings and clear photos make it easier to explain a repair, or a replacement budget, up the chain.
Plans that respect tenants
Access, noise and staging are worked out before the project starts, so you can tell tenants what to expect.
10-Year workmanship warranty
Our installs are backed by a 10-year workmanship warranty, and we review it with you at closeout.
Frequently Asked Questions
Straight answers about office building roofing.
Why does our office roof leak only in heavy rain?
Heavy rain tests drainage. A partly clogged drain or scupper, a low spot that holds water, or worn flashing at a parapet or curb can stay dry in a light shower and leak once water backs up. A roof survey pinpoints which one it is.
What does a roof survey cover on an office building?
A roofer walks the full roof and checks every HVAC curb, drain, scupper, parapet and roof hatch, along with the seams and surface in between. We photograph what we find, explain it in plain English and tell you what each area needs next.
Do you work on rooftop HVAC units?
We handle the roofing around them: curbs, flashings and penetrations. Servicing the units themselves is a job for your HVAC contractor, and we’re glad to coordinate with them when roof work touches the equipment.
Do you also roof apartment and condo buildings?
Yes. Our HOA & multi-family roofing service handles residential properties with the same survey-first approach. If you manage both office and residential buildings, we can cover the whole portfolio.
Do you serve office buildings outside Los Angeles?
Yes. We work across LA County and Orange County, from Burbank and Glendale to Irvine and Santa Ana. See our service area for every city we cover.
Tell us what you need.
Two minutes. A clear next step. No pressure.
Get a Straight Answer on office building roofing
Tell us about the building. A roofer, not a salesperson, walks the roof and gives you a clear next step on office building roofing, with a written scope and price.
- CSLB licensed, bonded & insured
- 10-year workmanship warranty
- Google customer reviews


