Flat Roofing in Los Angeles & Orange County — A flat roof that drains well and keeps you dry.
- Free roof evaluation
- Written price before any work
- 10-year workmanship warranty (call for details)
- CSLB #1061942
Flat Roofs Need Their Own Kind of Detail
Flat roofing from QRS covers new installs, replacements and repairs for low-slope roofs on homes, ADUs, garages and patio covers. Low-slope roofs are everywhere in Southern California: on mid-century and modern homes, over garages, patio covers and room additions, on new backyard ADUs, and tucked behind the parapet walls of Spanish-style houses. Every one of them still has to drain. That takes a gentle, deliberate slope that carries rainwater to a drain, a scupper (an opening through the parapet) or a gutter instead of letting it sit. When that slope is missing or a drain is blocked, water ponds, the sun bakes the membrane, and seams and flashings start to give way.
We install modified bitumen and other low-slope systems, chosen for your roof’s condition, how it drains and what sits on it, from HVAC equipment to skylights. Our advice comes from a roofer on your roof, not a salesperson at your kitchen table. The free roof evaluation photo-documents the membrane, seams, drains and flashings, explains the findings in plain English and ends with a clear next step: repair, monitor, maintain or replace. You see a written scope and price before any work begins, and finished installs carry our 10-year workmanship warranty (call for details).
Our Flat Roofing Services
From one open seam to a full tear-off, each service starts with an honest look at what your flat roof actually needs.
Flat Roof Replacement · FlatGuard®
A full tear-off down to the deck and a new modified bitumen or low-slope system, planned around how your roof drains.
Flat Roof Repair
Leaks, blisters, open seams and failed flashings traced to the source, repaired carefully and documented with photos.
New Flat Roof Installation · FlatGuard®
New low-slope roofs for ADUs, additions, garages and patio covers, with slope, drains and tie-ins planned from the start.
Roof Inspection Services · RoofScan 360®
Our free, roofer-led roof evaluation for shingle, tile and flat roofs: every finding photographed and explained, with one clear next step.
Where leaks start
Where flat roofs leak
Most leaks begin at details, not in the middle of an intact membrane: the drains, seams, flashings and everything that passes through the roof.
Recent flat roof projects
Brentwood, Los Angeles 90049
White Flat Roof
White flat roof in Los Angeles 90049: a bright, reflective flat roof on a mid-century home, with every skylight, vent and the chimney detailed.
Hollywood Hills West, Los Angeles 90046
Round Flat Roof Replacement
Flat roof replacement in Hollywood Hills West 90046: a torch-down roof with a white reflective cap sheet, custom-cut for a round, 12-sided home.
Mid-Wilshire, Los Angeles 90019
Tile & Flat Roofing at a Multi-Family Building
A multi-family building in Mid-Wilshire with new clay tile on its pitched roof and a reflective flat roof system over the rooftop terrace.
What people say after the job
269 reviews from the people we roof for, on Google.
Kelsey Breadmont
Read it on Google · 4 months ago“I was recommended this roofing company by a friend, and I’m really glad I went with them. I had a problem with water leaking into my attic from the flashing around the chimney, and the team was very helpful from the start. Tony was the roofer working with me, and he was always professional and friendly. He took care of resealing the flashing and chimney, which made the leak much better right away. He kept in touch with me after the work, and now we’re working on sealing the chimney even more to make sure everything is perfect. I feel confident that the team will get everything fixed up right. Based on my experience so far, I’d definitely give them five stars. Thanks to everyone there for their hard work!”
Samuel Mcilwee
Read it on Google · 2 months ago“Quality roofing specialist exceeded my expectations from start to finish. The crew showed up on time, explained everything clearly, and the quality of the work was outstanding. They were professional, honest, and left the property spotless when the job was done. It’s hard to find reliable contractor in LA, but these guys definitely earned my trust. I highly recommend them to anyone looking for quality roofing work. Five stars all the way!”
Jose Linarez
Read it on Google · a month ago“I was looking to replace my shingles roof in Encino and contacted a few roofing companies in the neighborhood. Out of four roofers, Quality Roofing Specialist was the only one that worked with my budget as well as my schedule. Their work was fantastic, and we love the outcome. They exceeded my expectations. I will definitely recommend to friends.”
What you can count on, on every job
- Free roof evaluation
- Written scope and price before any work
- 10-year workmanship warranty, call for details
- Licensed, bonded & insured
- Permits pulled
- Clean site and a nail sweep every day
Frequently Asked Questions
Straight answers about flat roofing.
Is a flat roof actually flat?
No. A well-built flat roof has a slight slope, often too gentle to notice, that moves water off the roof. If water still sits in the same spots long after the rain stops, the slope or the drainage needs attention.
What is modified bitumen?
It’s a tough, asphalt-based roofing membrane with built-in reinforcement, typically installed in layers with overlapping, sealed laps. It handles routine foot traffic and strong sun well, one reason it’s so common on low-slope homes in Southern California. The right system for your roof still depends on its condition and drainage.
Do you work on the flat sections of Spanish-style homes?
Yes. Many Spanish and Mediterranean homes pair tile roofing with flat sections hidden behind parapet walls, drained by scuppers through the wall. We look at the flat areas, the parapet caps and the wall flashings, not just the tile you can see from the street.
Do you work on flat roofs for commercial buildings?
Yes. Offices, shops, warehouses and many other commercial buildings rely on low-slope roofs, and we plan that work around each building’s condition and drainage too. Visit our commercial roofing section for details.
Show 2 more questions
Do you work on flat roofs in my part of LA or Orange County?
We work across Los Angeles County and Orange County, in cities such as Glendale, Torrance, Anaheim, Santa Ana and Huntington Beach as well as Los Angeles itself. Our service area page shows whether your city is on the list.
How long does a flat roof last?
There’s no single answer. The roofing system, how well the roof drains, how much sun it takes and how often it’s maintained all play a part, and water that sits on a flat roof after rain shortens its life. Rather than guessing from the roof’s age, a free roof evaluation looks at its actual condition.
Tell us what you need.
Two minutes. A clear next step. No pressure.
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