Flat Roof Repair
Most traced leaks on low-slope roofs end at a seam, curb, or drain, which flat roof repair fixes with matching membrane.
Flat roof repair in FlagstaffCommercial Roof Leak Repair
Flagstaff Commercial Roof Leak Repair
Commercial roof leak repair in Flagstaff that starts at the stain, traces the water back to its opening on the roof, then fixes that detail and rechecks it.
- Starting PointThe stain inside
- Tracing ToolsMeter, infrared, water test
- StopgapsTape, weighted patches, cleared drains
- Follow-UpRecheck after weather
Is This Leak A Repair?
Most leaks come from one failed detail. A few point to a roof that needs more.
One Detail To Fix
- A single stain that appears after rain or melt
- Drips near one rooftop unit, skylight, or wall
- A wet ceiling tile below a drain or scupper
- Water only during wind-driven rain from one side
- A leak that started after recent roof traffic
A Bigger Problem
- Stains in several bays at once
- Leaks returning after more than one repair
- Wet insulation readings far beyond the stain
- Sagging ceiling or deck near the wet area
- Rust stains running along deck flutes
Where Leak Tracing Ends Up
Water travels before it drips. These are the five places a trace most often leads back to on Flagstaff roofs.
Upslope Seams
A stain near the low side of a bay often starts at a seam several feet upslope. Water runs between the membrane and insulation until it finds a deck joint to drop through.
Curb Corners
Corners of rooftop unit curbs open first because flashing is folded there. Water entering at a corner can follow the curb framing and drip far from the unit.
Wall Flashing
Cracked counterflashing lets water behind the membrane at walls and parapets. It then runs along the base of the wall and shows up as a stain along an interior wall line.
Pipes And Conduit
Water reaching a pipe or conduit penetration often travels down it and drips at a fitting below. Split boots and dried pitch pans are checked wherever a stain sits near piping.
Drain Connections
Loose clamping rings let water under the membrane right at the drain, where it follows the drain line down. Stains around a drain leader inside point here.
Commercial Roof Leak Repair Choices In Flagstaff
Some leak work slows the water now. The rest fixes the opening for good.
| Repair | What It Does | When |
|---|---|---|
| Seam tape | Short-term seal on a split seam | Stopgap until a dry day |
| Weighted patch or tarp | Covers a torn area during storms | Stopgap, inspected after weather |
| Drain clearing | Stops water backing up under laps | First relief, then a drain reset |
| Permanent repair | Rebuilds the failed seam, flashing, or boot | Once the area is dry and confirmed |
What Finding The Real Opening Saves
A leak patched in the wrong place keeps coming back. Tracing it first protects these.
One Repair Instead Of Three
Patching the first opening you see often misses the real one. A traced leak gets fixed once, at the detail that actually let water in.
Insulation Kept Dry
Every week a leak runs, water spreads farther across the insulation. Finding the source early keeps the wet area, and the repair, smaller.
Rooms Back In Use
Offices, storage bays, and production floors under a leak lose space to buckets and tarps. A confirmed repair lets that space go back to work.
A Record For Later
Photos of the traced path and the repaired roof detail stay with the building records, which helps the next inspection and any insurance question.
Stain Spreading On A Ceiling Tile?
Call and describe where it is and when it grows. We can set up a temporary fix while the trace is planned.
How A Leak Gets Traced
Leak work splits between the room with the stain and the roof above it.
On The RoofAround The Building
1On The Roof
Inspect Your Roof
The roof above the stain is walked first, then everything upslope of it: seams, curbs, walls, drains, and penetrations, with photos and moisture readings at each suspect spot.
2Around The Building
Map The Stain
Inside, the stain, any drip points, and wet materials are measured from walls and columns so they can be located on the roof plan above.
3On The Roof
Test One Detail
A controlled water test runs on one seam or curb at a time while someone watches inside, so the entry point is confirmed instead of guessed.
4On The Roof
Fix The Opening
The confirmed detail is repaired: a seam rewelded or retaped, flashing rebuilt, a boot replaced, or a drain reset, with wet insulation removed around it.
5Around The Building
Recheck After Rain
After the next storm or thaw, the room below is checked again. A dry ceiling closes the job; a new stain starts a fresh trace from where it appears.
Repairs A Trace Leads To
The opening a trace finds usually belongs to one of these.
Commercial Metal Roof Repair
On panel roofs the trail usually ends at a loose fastener or a dried lap, the core of metal roof repair.
Commercial metal roof repairLeak Repair Questions
Answers about tracing, stopgaps, and lasting leak repairs.
Why is the ceiling stain far from where the roof is actually leaking?
Because water travels before it drips. It runs along deck flutes, across the tops of insulation boards, or down pipes and conduit, so the stain can sit many feet from the opening. Tracing starts at the stain, works upslope, and uses moisture readings or a water test to confirm the path.
Can a leak be found with infrared?
Often. An infrared scan taken after sunset shows wet insulation holding heat longer than dry areas, which maps where water has spread. It narrows the search, and core cuts or a water test confirm the exact opening.
Why does my roof leak only in some storms?
Wind direction and meltwater explain most of it. Rain driven from one side reaches flashing that stays dry in calm storms, and snow piled against a wall melts into openings that rain never reaches.
Is a temporary patch safe to leave through winter?
Only if it is checked. Tape and weighted patches wear out quickly in freeze-thaw, so they get looked at after each storm and replaced by the permanent repair at the first dry, mild stretch.
Should I move equipment away from a leak?
Yes, if it can be moved safely. Cover what stays with plastic, put a bucket under the drip, and photograph the stain and anything damaged before cleanup. Those photos help both the trace and any insurance claim.
Do you trace leaks on metal roofs as well?
We do. On panel roofs, water often runs along a purlin or the panel rib before dripping, so the trace follows the fastener lines and laps upslope from the drip.
What does leak repair cost?
It depends on how long the trace takes, how much wet insulation must be replaced, and the roof system. A single failed boot costs far less than a seam with soaked boards around it. The inspection gives you the repair list before work begins.
Find The Leak, Then Fix It
Tell us where the stain is and when it shows up. The trace starts from there.