Westminster 92683Commercial Flat Roof Replacement in Westminster 92683View project Commercial Roofing in Los Angeles & Orange County
Protect your building. Keep your business running.
Commercial roofing, planned around how your building runs. QRS is a commercial roofing contractor in Los Angeles and Orange County: repairs, replacement and scheduled maintenance for office buildings, retail stores, churches, warehouses, shopping centers and more. Every project starts with a roofer-led survey and a written scope.
- Roofer-led roof survey
- Written scope and price before any work
- Permits pulled
- CSLB #1061942
Certified with the manufacturers we install
Detail-First Roofing for Commercial Buildings
QRS is a commercial roofing contractor in Los Angeles and Orange County, with repairs, replacement and scheduled maintenance for office buildings, retail stores, churches, warehouses, shopping centers and more. Most commercial buildings in Southern California sit under low-slope roofs, and those roofs wear differently than a home’s. Water needs a clear path to drains and scuppers. Rooftop HVAC units and other equipment add penetrations that need sound flashing, while parapet walls and coping take the brunt of the sun and the Santa Ana winds. We repair and replace modified bitumen and other low-slope systems, along with the tile and shingle sections found on many churches and some retail buildings.
If you own or manage a commercial building, you need more than a price. You need to know what’s wrong, what it will take to fix and how the work will affect tenants, customers or staff. Our roof surveys are photo-documented and explained in plain English, every scope is written before work starts, and schedules are planned around your hours. When the job is done, you get closeout photos for your files. Request an estimate to get started.
Commercial Roofing Services
Repairs, replacement and ongoing care for any commercial roof.
Commercial Roof RepairLeaks traced to where the water gets in, then repaired at drains, parapets, seams and rooftop equipment, with before-and-after photos.Learn more 
Commercial Roof ReplacementWhen repairs stop adding up: a roofer-led survey, the right low-slope system for your building and phased work that keeps you open.Learn more 
TPO RoofingA white, heat-welded single-ply membrane for flat and low-slope commercial roofs, installed over a roof surface prepared for it.Learn more 
Commercial Roof Maintenance & InspectionsScheduled inspections and upkeep for commercial roofs, with photo reports for owners, managers and boards, and drain and flashing issues caught early.Learn more
Commercial Roofing by Building Type
Every type of building brings its own roofing concerns, so choose yours to see how we plan the work.
Office Building RoofingRoof surveys, repairs and replacement for office buildings, planned around your tenants and documented for owners and property management clients.Learn more 
Retail Store RoofingRoofing for retail stores, from the low-slope roof over the sales floor to mansard and façade sections, scheduled around store hours.Learn more 
Church RoofingRoofing for churches and ministry buildings, from tile and shingle sanctuary roofs to low-slope halls, planned around services and events.Learn more 
Industrial RoofingRoofing for manufacturing and industrial facilities, with rooftop equipment, penetrations and safe access planned before crews go up.Learn more 
Shop & Small Business RoofingRoof repairs and replacement for small commercial buildings: workshops, auto and repair shops, studios and storefront businesses.Learn more 
Warehouse RoofingLarge low-slope warehouse roofs surveyed, repaired and replaced in sections, with drainage, skylights and the inventory below in mind.Learn more 
Mall & Shopping Center RoofingRoofing for malls and shopping centers, phased across tenant spaces and common areas and planned to keep the center open for business.Learn more 
Property Management RoofingOne roofer for the buildings you manage: photo reports, written scopes for owner approval and work planned around tenants.Learn more
Where leaks start
Where commercial roofs leak
Most leaks begin at details, not in the middle of an intact membrane. Condensate from an air conditioner or a plumbing leak can look the same, so a roofer checks those too.
Local roofers. Real accountability.
A roofer surveys your building first, and you get photos and a written scope and price before any work. One company answers for the roof, from the survey to the closeout photos for your files.
- Licensed, bonded and insured California contractor, CSLB #1061942
- Certified with the manufacturers whose systems we install
- We pull the permits
- A written scope and price before any work
- 10-year workmanship warranty on installs (call for details)
269Google reviews from the people we roof for
2020Licensed California contractor since
12Crews across Southern California
4Counties: Los Angeles, Orange, Riverside and San Bernardino
Why Owners and Managers Choose QRS
- Surveys led by roofersA roofer walks the roof, photographs what matters and gives you a clear next step for each area: repair, monitor, maintain or replace.
- Scope and schedule in writingBefore any work starts, you see the scope, the price and how the work will fit around your operations.
- Experience and accountabilityQRS is a licensed California contractor since 2020, and backs installs with a 10-year workmanship warranty (call for details).
A written scope, before any work.
Tell us about the building or project and we’ll start with a roofer’s look at the roof, not a sales pitch.
- Roofer first. Condition-focused survey of the roof.
- Photo documentation. Photos you can share with owners and tenants.
- Written scope & price. Before any work starts.
- Clear next step. Repair, maintain or replace, in plain English.
Commercial, HOA & partner projects
Roof survey
Roofer-ledwritten scope and price
Photos you can share with owners and tenants, and a clear next step.
Request a roof surveyFeatured projects
Recent roofing projects
See all projectsWestminster 92683Commercial Flat Roof Replacement in Westminster 92683View project Homes across Los Angeles, roofed right.
Read more reviews★★★★★
“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!”
★★★★★
“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.”
★★★★★
“Tony was very responsive when I called. The entire process was faster than I expected. With his continuous supervision the whole project went so smoothly and professionally, the place was cleaned up completely. I have a beautiful roof now :)”
★★★★★
“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!”
Contractors
Partner With QRS
For contractors, builders and property management clients
Need a roofing partner for your projects? We bring roofer-led assessments, written scopes and photo-documented work to every job we do with you.
Partner with us →
Frequently Asked Questions
Straight answers about commercial roofing.
How do I choose the best commercial roofing contractor?
Look for a CSLB license, bonding and insurance, a roofer-led survey of your roof, a written scope and price before any work, and work on buildings like yours. Our guide to choosing a commercial roofing contractor lists the questions to ask, and our license and credentials are on one page.
What types of commercial buildings do you roof?
We roof office buildings, retail stores, churches, industrial facilities, shops and small businesses, warehouses, and malls and shopping centers. Apartment buildings and condo communities are covered by our HOA & multi-family roofing service.
Can our building stay open while you work on the roof?
Usually, yes. Most commercial roofing happens while the building is in use, so we plan access, noise, staging and deliveries with you before work begins. If any step needs an area cleared, you’ll know ahead of time.
Do you repair commercial roofs, or only replace them?
Both. Many commercial leaks trace back to one failed flashing, a clogged drain or a worn seam, and a targeted repair is the right fix. When a roof is near the end of its life, the survey photos show it, so you can plan and budget for replacement.
Do you offer ongoing maintenance for commercial roofs?
Yes. Scheduled roof care covers seasonal checks, clearing drains and debris, and a photo record you can keep with your building files. It helps you catch wear early and deal with it before the rainy season.
Do you work with contractors and property management clients?
Yes. We partner with contractors, builders and property management clients across Los Angeles and Orange County. Our property management roofing page shows how we work with managers, and our contractor partnerships page explains how contractor projects run.
Start here
Tell us what you need.
Two minutes. A clear next step. No pressure.
Prefer to answer a few questions instead? Use the step-by-step form
Get a Straight Answer on commercial roofing
Tell us about the building. A roofer, not a salesperson, walks the roof and gives you a clear next step on commercial roofing, with a written scope and price.
- CSLB licensed, bonded & insured
- 10-year workmanship warranty (call for details)
- Google customer reviews
