As a Hastings commercial roof leak repair contractor, we trace water from the stain inside to the failed seam, curb, or fastener and repair that detail.
Fit Check
Hastings commercial roof leak repair starts by ruling out water that only looks like a roof leak. Here is how the two compare.
Leak Sources
Most commercial leaks trace to six places. The cause chip shows what usually opened each one.
Tracing Methods
Different leaks need different tools to find. This is how each one gets traced, and what it turns up.
| Method | How It Works | Best For |
|---|---|---|
| Visual walk | Match the inside stain to seams, curbs, and drains directly above and upslope | Clear failures such as open laps and torn flashing |
| Moisture meter | Readings across the membrane show where the board under it is wet | Mapping how far water has spread |
| Core cut | A small sample through the roof shows each layer and its moisture | Confirming wet insulation before a repair |
| Infrared scan | Wet insulation holds heat differently and shows on a thermal camera after sunset | Large low-slope roofs with hidden wet areas |
| Water test | Controlled water on one detail at a time while someone watches inside | Curbs, skylights, and walls that leak only in storms |
Water on the floor today? Call, move what you can from under it, and photograph the stain. We will start tracing from there.
Call UsA stain that grows after storms and then dries is still a leak. Book an inspection and get it traced before the deck rusts.
Schedule Free InspectionRepair Sequence
Finding the leak takes most of the effort. Here are the five decisions that get it fixed.
Inside first: we map stains, drips, and wet tile, noting when each one shows up. On the roof, the area above and upslope gets walked seam by seam, curb by curb.
Condensate lines, cabinet seams, and wall joints all drip like roof leaks. Checking them early keeps you from paying to patch a roof that was never the problem.
Clear failures get found on a walk. Hidden ones get a meter survey, a core cut, an infrared scan after sunset, or a controlled water test on one detail at a time.
Repairs go where the water enters: a rebuilt curb flashing, a welded seam patch, a reset drain clamping ring, or new fasteners along one purlin line.
After the next rain, the inside spot gets checked again. Your notes record the source, the repair, and the stain location so a future leak starts with history.
What It Protects
A leak traced and fixed early stays a small repair. One left alone spreads in every direction.
Related Repairs
Once the source is found, the fix often falls under one of these services.
Seam failures, punctures, and ponding on single-ply or built-up roofs get matched membrane patches.
Flat roof repair
Fastener rows, end laps, and rusted panels are the usual sources on shops and metal warehouses.
Metal roof repair
Leaks around exhaust fans and process curbs need materials that hold up to what comes out of the stacks.
Industrial roof repair
Question about your own roof?
Tell us where the stain is, when it shows up, and what sits on the roof above it.
Call UsLeak FAQ
Mostly how long the leak takes to find and what failed. A clearly open seam is quick work. A leak that travels inside the roof may need an infrared scan or a water test. Removing wet insulation, working through a ceiling inside, or rebuilding flashing adds time and material.
No. A leak in heavy rain points to a specific failure. National Weather Service figures put normal Hastings precipitation at 26.40 inches a year, and the heavy storms within that total test drains, flashing heights, and seams. A roof that leaks only in downpours usually has a drainage or flashing problem.
Map every wet spot on the floor and the deck above it first. High ceilings let water ride purlins or deck flutes a long way before it drips, so we mark each spot inside and then trace upslope on the roof. Fasteners, laps, skylights, and curbs along that line get checked first.
The curb flashing gets rebuilt and the unit itself gets checked, because condensate lines, cabinet seams, and duct penetrations can leak and look like roof leaks. New membrane or metal flashing goes up the curb to proper height, and loose curb caps and counterflashing get reattached and sealed.
A commercial roofer who works on the membrane or metal system on your building. These roofs need matched materials, primers, and welding or seam tools, and a mismatched patch can fail early or damage the membrane around it. Ask for a written note of what leaked and what was repaired.
Send a photo of the stain and the address. We will trace the water to its source and repair the detail that let it in.
