Low Slope Roof Repair
Low slope roof repair from BST Roofers starts with finding out why your flat roof is holding water, letting go at the seams, or pulling away at the flashing. Each of those needs a different fix, and we will tell you which one before we start.
- Licensed and insured
- Prompt response once you call
Water still standing after that points to the drainage slope or a blocked drain, not a failed membrane.
Four causes behind nearly every low-slope leak
Four things cause nearly every low-slope leak we get called out for. Each one points to its own repair.
-
Ponding water past 48 hours
Water sitting more than 48 hours after rain usually means the drainage slope has flattened or a drain is blocked, not that the membrane failed.
-
Seam separation
Separated seams, often from age or a weld that never fully bonded, let water track sideways before it shows up inside.
-
Flashing pulled loose
Flashing pulled loose at a parapet or roof edge opens a direct path right where two surfaces meet.
-
Bubbling or granule loss
A membrane bubbling or shedding granules has taken years of sun and is nearing the end of what a patch can fix.
Water coming in right now? Here is what to do before we arrive. Not sure if it can wait? This breaks down the difference between a scheduled repair and an emergency.
The fix follows what we find
The repair follows what we find during inspection, not a default fix.
Seam repair
Re-welds or re-seals separated seams on TPO, EPDM, or modified bitumen.
Flashing repair
Resets and reseals flashing at parapets and edges.
Patching
Cuts out and replaces a damaged section without touching the rest of the roof.
Drain repair
Clears or rebuilds drains and scuppers so water actually leaves.
Membrane repair
Addresses bubbling, cracking, or granule loss across TPO, EPDM, and modified bitumen.
Full inspection
Walks the roof to catch a second problem before it turns into a second leak.
Most calls need a repair. Some need the truth.
A seam repair or patch is right when the membrane around it is still sound and the deck is dry. That covers most calls we get.
Replacement is the honest answer once the membrane has aged out across most of the roof, or the deck has taken on water and gone soft. Patching a roof in that shape just moves the leak.
If that sounds like yours, our low slope roof replacement page covers what a full tear-off involves.
Scheduled around the building, not just the leak
Response depends on the leak. Access and scheduling depend on your building.
| Property type | Response and access notes |
|---|---|
| Residential | Same-day scheduling, roof access usually simple |
| Multi-family | Coordinated around tenant units below the roof |
| Apartment building | Scheduled around common-area and occupied hours |
| Retail store | Worked around store hours |
| Office building | Scheduled outside occupied hours where possible |
| Mixed-use | Coordinated across residential and commercial tenants |
Swipe to see the full table
A commercial roof failing in multiple spots, not just one leak, may call for full commercial roof restoration and recoating instead of repeated spot repairs.
Before you book a repair
