Read the full review →“I wanted to take a moment to express my utmost gratitude to Chris and the entire team at Power Roofing for their exceptional service and expertise in installing our commercial flat roof in Santa Monica.”
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Power Roofing provides commercial roofing in Los Angeles for offices, retail buildings, apartment complexes and warehouses: repairs, coatings and full replacement of flat and low-slope roofs, working with TPO, PVC, modified bitumen and built-up (hot mop) systems. We hold the C-39 roofing and General B licenses (#1073368), and our offices in Los Angeles, Sherman Oaks and Irvine cover commercial properties throughout Los Angeles, Orange and Ventura counties.
A commercial roof raises different questions than a house: who is affected while the work happens, whether the roof can be restored instead of replaced, and which California energy rules a reroof sets off. This page walks through each one and then explains what drives the cost. To set up a roof assessment, call us or request a free inspection.
Commercial buildings typically have flat or low-slope roofs. Water stays on them longer than on a pitched roof, so they depend on a continuous membrane, sealed seams and drains that work. These are the systems we work with:
| System | How it is built | Where it fits |
|---|---|---|
| TPO | Single-ply sheets with heat-welded seams, usually white | Large, open roofs where a reflective surface helps meet the cool-roof rules |
| PVC | Single-ply sheets with heat-welded seams | Roofs exposed to grease or chemicals, such as above restaurant kitchen exhausts |
| Modified bitumen | Asphalt-based rolls laid in plies, torch-applied, cold-applied or self-adhered, often with a reflective cap sheet | Roofs with regular foot traffic and many penetrations |
| Built-up (hot mop) | Alternating plies of felt and hot asphalt, finished with gravel, a cap sheet or a coating | Smaller commercial and apartment roofs, and repairs to existing built-up roofs |
| Silicone coating | A liquid-applied membrane over a sound existing roof | Restoring an aged but dry roof without a tear-off |
Older buildings often carry EPDM (rubber) roofs as well, and we repair those too. Flat and low-slope roofs on houses and new construction are covered on our page about new roof installation in Los Angeles.
A commercial roof that leaks is not always a roof that needs replacing. The choice depends on what is under the surface:
Wet insulation is the deciding detail. A coating or recover laid over a wet roof traps the water in the building, so soft spots, blisters and other signs of trapped moisture are checked before any option is priced. Our coating projects include a 6,800 sq. ft. flat roof finished with silicone coating in Los Angeles and a roof restoration in San Marino done with no demolition.
California’s Energy Code (Title 24, Part 6) applies to reroofing, not only to new buildings, and permit applications filed on or after January 1, 2026 fall under the 2025 edition. The California Energy Commission’s 2025 Nonresidential Compliance Manual sets out when a reroof has to meet cool-roof and insulation requirements:
Rooftop equipment changes the insulation math. When HVAC units stay in place instead of being disconnected and lifted, the added insulation can be limited to the greater of R-10 or the thickness that keeps the manufacturer’s required height between the membrane and the top of the unit’s base flashing. Hotels and motels have their own values, and apartment buildings may fall under the code’s multifamily or residential provisions instead of these nonresidential ones; we confirm which rules apply to your building. These details are settled before the estimate, because they change both the price and the schedule.
A commercial reroof happens over people who are working, shopping or living in the building. Before work starts, settle these points with your roofer:
We coordinate with the building’s other contractors on these jobs and follow OSHA guidelines on the job. One property owner whose rental roof was damaged in a storm wrote that our team “coordinated access with our tenant, documented the damage, and sent us completion photos.”
Commercial roof leaks tend to start at the same few details, and a lasting repair depends on finding the right one:
Commercial leaks are part of our roof repair in Los Angeles service. On a building with an aging roof, assessing the whole roof shows whether repairs will keep up or a coating, recover or replacement is due. We also set up maintenance programs for commercial buildings through our roof maintenance in Los Angeles service; documented maintenance keeps warranty coverage valid.
We price commercial roofs after seeing them, because the same square footage can mean very different work. The main factors:
Commercial installations typically take 5-10 days or longer depending on system type and building size. Rooftop equipment, phased work around tenants and any deck or insulation found wet once the old roof is open all count toward that schedule, which is why they are settled before work starts.
Often, yes, if the membrane is still attached and the insulation and deck are dry. A silicone coating can restore it without a tear-off. If the roof is wet or deteriorated, replacement is the honest answer.
Roof emergencies don’t follow business hours, and we offer 24/7 emergency response. We dispatch a team to stabilize the situation, prevent further damage, and implement temporary solutions. After stabilization, we assess full damage extent, provide detailed estimates, and schedule permanent repairs at times convenient for you.
Reroofing needs a building permit from the city or county where the building stands, and Energy Code compliance for the reroof is documented through that permit. City of Los Angeles reroof permit descriptions themselves note that a cool roof may be required for non-residential buildings under Title 24, Part 6, Section 141.0(b)2B, and the city’s permit records for our license include built-up reroofs.
Read the full review →“I wanted to take a moment to express my utmost gratitude to Chris and the entire team at Power Roofing for their exceptional service and expertise in installing our commercial flat roof in Santa Monica.”
Read the full review →“I am more than happy to recommend Power Roofing to anyone seeking commercial roofing services in Hollywood or the surrounding areas.”
Read the full review →“They has done an excellent job re-roofing several of our historic buildings. I would highly recommend him”
Read the full review →“Power Roofing team completed new roof on two-story 17-unit apartment building. They were very efficient and affordable. It was done ahead of schedule and it looks great.”
Read the full review →“A recent storm damaged the roof on our rental property. The team coordinated access with our tenant, documented the damage, and sent us completion photos.”
Read the full review →“Very impressed with Israel and his crew. After a bad roof installation by a different company resulted in major damages to our house, we knew we had to get the right company to replace our faulty flat roof.”
Send us the building address, the roof’s age if you know it and what is happening: leaks, ponding, an upcoming sale or refinance, or a reroof you need to plan. We will inspect the roof, check drains, seams, flashings and signs of trapped moisture, and lay out repair, coating and replacement options with the code requirements that apply. Call us or request a free inspection, or browse all our roofing services.