Commercial Roof Leak Repair in Los Angeles
Commercial roof leak repair in Los Angeles starts with finding where water actually gets in, which on a flat roof is rarely directly above the drip. We trace leaks on warehouses, retail, offices and multifamily buildings, repair them at the source, and document the fix with photos.
Leak in your building?
Tell us about the building and what you’re seeing. We’ll inspect it and send a photo report.
Call (323) 551-9034Request an inspectionNo obligation. Photo report included.If Your Roof Is Leaking Now
- Move inventory, equipment and electronics away from the water and catch drips.
- Shut off power to any area where water is near lights or electrical equipment.
- Note where and when it leaks: during rain, after rain, or when HVAC runs.
- Keep people off the roof, especially when it's wet.
- Call us with the location of the leak inside the building.
The usual sources
Seams and laps
Open or failed seams on single-ply membranes and lap failures on built-up and modified bitumen roofs.
Flashing
Perimeter edges, parapet walls and transitions where the membrane turns up a wall.
Penetrations and curbs
HVAC curbs, pipes, vents and conduit, where sealant ages and boots crack.
Drains and scuppers
Clogged or damaged drains that cause ponding, which finds every weak point.
Our process
Trace from inside
We start where the water shows up and map it against the roof above.
Inspect the roof
Seams, flashing, penetrations and drains in the area, plus anything upslope that drains toward it.
Repair at the source
Seam welding or patching, new flashing, rebuilt penetrations or drain repairs, matched to the roof system.
Confirm and document
Photos of the repair, plus a note on anything else on the roof that needs attention.
When a leak points to a larger problem
One leak is usually a repair. Repeated leaks in different places, wet insulation or a membrane failing across the roof point to something bigger. In that case we’ll show you the options: targeted flat roof repair, a restoration coating if the roof is still sound, or replacement. For most leaks, see our main commercial roof repair page.
When you need commercial roofing contractors in Los Angeles to stop a leak, call (323) 551-9034. Regular maintenance catches most leak sources before they reach the inside.
Frequently asked questions
Why is my roof leaking far from where the water shows up?
Water often travels along the deck, insulation or structure before it drips, especially on flat roofs. Tracing from inside and inspecting upslope finds the real entry point.
Can a leak be repaired in the rain?
Temporary measures may be possible, but permanent repairs on most roof systems need a dry surface.
Should I patch a leak or replace the roof?
One leak on a sound roof is a repair. Repeated leaks, wet insulation or widespread membrane failure usually mean a bigger fix.
What causes commercial roof leaks?
Most come from seams, flashing, penetrations like HVAC curbs and pipes, and clogged drains that cause ponding.
Related services and guides
A leak is often the first sign of a larger issue, so a Los Angeles commercial roofer should check the whole roof, not just the wet spot.
Stop the Leak at the Source
(323) 551-9034Request an inspection
Los Angeles Commercial Roofing Pros · 629 S Central Ave, Los Angeles, CA 90021