Rooftop Unit Curbs
Base flashing at the curb cracks with unit vibration and service traffic. Water runs down the curb wall and along the deck before it reaches a ceiling tile.
Leak Tracing And Repair
Tucson Commercial Roof Leak Repair
Commercial roof leak repair in Tucson that starts at the stain, works upslope to the entry point, and repairs the cause behind the drip.
- Stains matched to the roof above
- Moisture meter readings
- Water tests in sections
- Temporary seals before rain
Leak Or Bigger Problem
Is This One Leak Or A Roof-Wide Problem?
One leak point is a repair. Water across many rooms tells a different story.
Signs Of A Single Leak
- One stain that grows during rain
- Drips near one rooftop unit or skylight
- A leak that started after rooftop work
- Dry readings around the wet area
- A seam or flashing failure you can see
Signs Of A Wider Problem
- Stains in several rooms after one storm
- Wet insulation readings across a section
- Leaks moving to new spots after each fix
- Soft spots when walking the roof
- Membrane brittle and cracked across the field
Common Leak Sources
Where Commercial Roof Leaks Start
The stain inside rarely sits under the hole. These six entry points cause most of the leaks we trace.
Pipe And Vent Penetrations
Split rubber boots and pitch pans with shrunken filler let water straight down the pipe. The stain often shows up on a wall or around a light fixture.
Seams In The Field
An open seam lets water spread under the membrane across the insulation, so the stain can sit several feet from the seam that failed.
Walls And Coping
Water entering at a cracked parapet cap travels down inside the wall and appears along the exterior wall, sometimes a floor below.
Skylights And Hatches
Cracked domes, failed curb flashing, and worn hatch gaskets leak right around the opening, which makes them easy to confirm with a water test.
Drain Bowls
A cracked drain bowl or loose clamping ring leaks under the drain itself, often near the middle of a room, and gets worse when the drain clogs.
Repair Options
Tucson Commercial Roof Leak Repair Options
Leak work runs in two stages: control the water now, then repair the cause once it is confirmed.
| Repair | When It Fits | What It Involves |
|---|---|---|
| Temporary leak control | Rain is coming and the source is known | Tape the split seam, seal the open flashing, clear the clogged drain, or cover the puncture |
| Leak tracing | The stain sits far from any visible damage | Work upslope from the stain, water-test sections, and take moisture readings |
| Permanent repair | The entry point is confirmed | Replace the failed flashing, seam, boot, or panel with matching material |
| Wet area replacement | Insulation around the leak is soaked | Cut out wet insulation, replace it, and patch the membrane over it |
Who Benefits
Who Gains When The Leak Is Traced
Finding the real entry point saves money and ends the repeat calls.
Owner
- Money goes to the one failed detail instead of guesses across the roof
- Wet insulation is caught before it spreads under more membrane
- Photos tie the stain to the repair for insurance or tenant questions
Facility Manager
- The same leak stops coming back after every storm
- Tenant complaints close with a clear answer on the cause
- Temporary seals buy time before rain without a rushed repair
Tenants And Staff
- Ceiling tiles, carpet, and files stay dry under the repaired leak
- Buckets come out of offices and hallways
- Light fixtures stop dripping during storms
Stain Growing After Every Rain?
Take a photo of the stain and note when it drips. Call with that and the address so the inspection starts above the right room.
How We Trace Leaks
How We Find And Fix A Leak
Tracing works backward from the stain. The repair happens once the cause is confirmed.
Inspect Your Roof
We start inside at the stain, then go up and check every curb, drain, seam, and penetration upslope of it, reading moisture as we go.
Water-Test Sections
Suspected entry points are flooded one at a time with a hose while someone watches inside, so each test proves or rules out one detail.
Seal Or Repair
If rain is coming, the leak source gets a temporary seal. The permanent repair uses matching material once the cause is confirmed.
Confirm It Is Dry
After the repair, the area is tested again and the stain location is checked through the next rain, with photos of both.
Related Services
Repairs That Often Follow A Leak
Once the leak is traced, the fix usually falls under one of these.
Flat Roof Repair
Most traced leaks on low-slope buildings end at a seam, curb, or drain on the flat roof, repaired with matching membrane.
Flat roof repair in Tucson
Commercial Metal Roof Repair
On panel roofs, the trail usually ends at a loose screw, an open lap, or a cracked skylight panel.
Commercial metal roof repair in TucsonLeak Questions
Roof Leak Repair Questions
Why does the stain show up far from the leak?
Because water travels before it drips. It gets in at a seam, flashing, or fastener and runs along deck flutes, insulation, or a joist until it finds a low spot or a gap in the ceiling grid. Tracing starts above the stain and works upslope past every curb, drain, and penetration.
Can a leak be stopped before the permanent repair?
Often, once the roof is dry enough to work on safely. Taping a split seam with a compatible product, sealing an open flashing, clearing a clogged drain, or covering a puncture limits interior damage. A temporary patch buys time, and the permanent repair follows once the cause is confirmed.
Do you use infrared or moisture meters?
Moisture meters go on every leak call, read in a pattern around each stain and entry point. Infrared scans help on large flat roofs where wet insulation holds heat after sunset. Core cuts confirm what the readings show before anything is removed.
What if the leak happens only in heavy rain?
Wind-driven monsoon rain finds gaps that light rain misses, such as coping joints, upturned laps, and the backs of curbs. Water tests with a hose aimed the same direction as the storm wind recreate it.
Will you need to cut the roof open?
Sometimes, but in small spots. A core cut a few inches across shows whether insulation is wet and how far the water spread, and it gets patched before we leave the roof.
Why does a patched leak keep coming back?
Usually the patch landed on the stain location instead of the entry point, or the patch material does not match the roof. Asphalt mastic on a TPO seam or caulk over a cracked curb flashing fails at the edges within a season.
Get The Leak Traced And Fixed
Call with the address and where the stain is, or request a free estimate. We will trace the leak to its source.