Commercial Roof Leak Repair
If a stain keeps returning after a flat roof patch, the water is entering somewhere else, and a full leak trace finds it.
Commercial roof leak repairFlat Roof Repair
Tolleson Flat Roof Repair
Flat roof repair for Tolleson warehouses, cold-storage buildings, and retail centers, from split TPO seams to drains and parapet flashing, matched to the membrane on your roof.
Repair Facts
- TPO, PVC, and built-up roofs
- Drain and scupper reflashing
- Moisture checks before patching
- Before and after photos
Is This Flat Roof A Repair Job?
A repair holds on a flat roof when the leaks trace to details and the board underneath is dry. Here is how to tell.
Good Fit For Repair
- One or two leak areas you can point to on a floor plan
- Lifted seam edges with dry insulation beneath
- A drain or scupper that ponds after storms
- Curb or parapet flashing pulled loose in spots
- Membrane that still flexes without cracking
- Leaks that started after a recent storm
Look At Bigger Work
- Wet cores across large sections of the roof
- Membrane that cracks when folded
- Blisters spread over most of a built-up roof
- Leaks moving to new spots after each storm
- A deck that sags or rusts from inside
- Insulation that stays wet across many bays
Flat Roof Leak Points On Tolleson Buildings
On wide distribution and cold-storage roofs, these five details account for most of the leaks we repair.
Plan view, not to scale
- 1
Lifted Seams
Heat cycling opens TPO laps and splits built-up seams. We clean, prime, and weld or ply over them.
- 2
Drain Bowls
Packed strainers back water under the clamping ring, so the bowl gets cleared and the flashing renewed.
- 3
Scuppers
Dust and debris hold water at the wall, and the corners of the scupper liner crack first.
- 4
Unit Curbs
Flashing at rooftop units and exhaust fans pulls away as the curb moves with each cooling cycle.
- 5
Parapet Flashing
Loose wall flashing and cracked coping send water behind the membrane at the wall line.
- 6
Pipe Boots
Boots dry out and split at the collar, and the gap lets water run straight down the pipe.
Flat Roof Repair Options In Tolleson
The repair depends on the membrane and the detail that failed. These are the ones we make most often.
| Repair | When It Fits | What It Involves |
|---|---|---|
| Welded TPO or PVC patch | Split seams, punctures, small tears | Clean and prime the sheet, hot-air weld a rounded patch, probe the new seam |
| Built-up roof repair | Blisters, splits, and open laps | Cut out damaged plies, add compatible felts with asphalt or mastic, resurface |
| Drain and scupper reflashing | Water at the bowl or wall opening | Clear the drain, reset the clamping ring, flash new membrane into the bowl or liner |
| Curb and pipe flashing | Leaks beside units, fans, or pipes | Strip old flashing, install new base and counterflashing, seal the boot |
| Wet insulation cutout | Soft or wet areas found by scan or core | Cut out the wet board, replace it, and patch the membrane over dry material |
| Coping and edge metal | Loose caps or lifted edges after wind | Refasten or replace the metal, reseal the joints, and tie the membrane edge back in |
Why Fix A Flat Roof Leak Early
Water that gets past a seam spreads sideways through the insulation. Stopping it early keeps the repair small.
- Insulation boards stay dry, so the fix stays a patch instead of a cutout
- Cold-storage panels and freezer ceilings avoid condensation damage below the leak
- Drains keep working, which keeps ponding from loading the deck
- Built-up plies keep their bond instead of blistering outward from the wet spot
- Stock and racking under the leak path stay dry
Standing Water After A Storm?
Ponding that stays long after the rain stops points to a blocked drain or a low spot. Call, and we will check the drain and the seams around it.
How We Repair A Flat Roof
Four steps, each one aimed at the detail that let water in.
- 1
Inspect Your Roof
We walk the membrane, probe seams, check drains and scuppers, and scan for moisture so a patch never goes over wet board.
- 2
Open The Problem Area
Damaged membrane and any wet insulation come out, cut back to dry material at every edge of the repair.
- 3
Weld Or Ply The Repair
TPO and PVC get hot-air welded patches. Built-up roofs get compatible felts and asphalt, then resurfacing to match.
- 4
Probe And Photograph
Every new seam is probed with a hand tool, then photographed, so you keep a record of what was fixed and where.
Related Repairs For Flat Roofs
Flat roof work often overlaps with two other services.
Industrial Roof Repair
Flat roofs on food plants carry exhaust and makeup air units, and repairs near them need lockout and intake planning.
Industrial roof repairFlat Roof Repair Questions
What owners of Tolleson flat-roof buildings ask most.
Where do flat roofs on Tolleson commercial buildings usually leak?
At the details, rarely in the open field. Seams lifted by heat cycling, drains and scuppers packed with dust, curbs around rooftop units, parapets with cracked coping, and pipe boots pulling away from the membrane cause most leaks on wide distribution and cold-storage roofs.
Can you repair a TPO roof that is 15 years old?
Often, yes. An older TPO sheet still welds when it is clean and the surface has not chalked through. We make a test weld first, and if the sheet refuses it, the patch switches to a compatible tape system.
Do you repair PVC roofs?
Yes. PVC welds much like TPO, though the two sheets are not interchangeable, so the patch material matches whatever the roof already has. A quick test on a scrap confirms the type when no records exist.
How long can water stand on a flat roof?
Standing water should drain off within a couple of days after rain. Longer ponding loads the deck, wears the membrane, and points to a blocked drain or a sagging spot that needs a cricket or added drainage.
Do you fix ponding, or only the leak?
Both. Clearing a drain or reflashing a scupper often ends the ponding. A low area that holds water with clear drains can get tapered insulation or a small cricket during the repair.
What raises the cost of a flat roof repair?
Wet insulation is the biggest variable, because every soaked board has to come out. Roof height, hatch location, and the number of curbs or drains in the repair area add to it, and so does work scheduled at night.
Can repairs be done in summer heat?
Yes, with early starts. Membrane and adhesive work goes on in the morning hours, and crews stop before the roof surface gets hot enough to scorch hands or soften fresh asphalt.
Fix The Leak On Your Flat Roof
Point us to the stain or the ponding. We will inspect, repair the detail, and send the photos.