Commercial Roofers in Los Angeles, CA
Commercial roofers in Los Angeles, CA repair and replace the flat and low-slope roofs on shops, offices, warehouses and apartment buildings. The work runs from a failed seam or drain to a full TPO or modified bitumen re-roof. A roofer visits the building, walks the roof and writes the estimate for the owner or property manager.
Commercial roofers in Los Angeles: repair and re-roofing
Most commercial roofs in Los Angeles are low-slope membranes: TPO, modified bitumen or built-up. Repairs cover split seams, failed drains and punctures from rooftop work, and the flashing at parapets and equipment curbs. A re-roof strips or overlays the old membrane and installs a new system on dry insulation.
Systems and what they cost to maintain
TPO is welded at the seams and, in InterNACHI's range, lasts about 7 to 20 years, with thickness setting where it falls [thisoldhouse.com, updated 2026-04-07]. Modified bitumen is layered and torch- or cold-applied. A coating can extend a membrane with dry insulation and a sound deck. The estimate names the system, the thickness and the warranty term.
Working around a building in use
Tenants stay open during roof work, so the roofer schedules around deliveries and business hours, protects rooftop equipment and keeps walkways clear. Access, parapet height and rooftop units are checked on the first visit and priced into the estimate.
Commercial roof inspections and records
A written inspection gives an owner a dated record of the roof's condition, useful for a lender, an insurer or a lease negotiation. It is the same inspection described on the roof inspection page, applied to a commercial roof.
Commercial roofers in Los Angeles: questions answered
Do you work on apartment buildings?
Yes. Apartment and small commercial buildings with flat or low-slope roofs are quoted the same way, with access and tenant schedules noted.
What is TPO roofing?
TPO is a single-ply white membrane welded at the seams. It is common on commercial flat roofs and lasts 7 to 20 years, with thickness setting where it falls.
Can a commercial roof be coated instead of replaced?
Sometimes, when the insulation is dry and the deck sound. The roofer checks moisture before suggesting it.