Curb Flashing Rebuild
Failed flashing at an HVAC or fan curb is stripped back, the corners are reinforced, and new membrane and counterflashing go on.
Leak Tracing
Sioux City Commercial Roof Leak Repair Contractor
Is That Ceiling Stain Coming From a Seam, a Curb, or a Drain?
As a Sioux City commercial roof leak repair contractor, we trace water from the stain inside to the spot where it enters, then repair that spot.
- Stains mapped on a floor plan
- Water path traced upslope
- Curbs and flashing tested
- Before and after photos
Roof Fit Check
Is This Leak a Fit for Commercial Roof Leak Repair in Sioux City?
Sioux City commercial roof leak repair starts at the symptom you can see inside. Find yours in the rows below to see what the repair usually involves.
- Usually Fits
- Sometimes
- Rarely
| Roof Condition | Spot Repair | Trace And Repair | Larger Roof Work |
|---|---|---|---|
| One stain under a rooftop unit | Sometimes | Usually Fits | Rarely |
| Drips that move after each storm | Rarely | Usually Fits | Sometimes |
| Leak right after hail | Sometimes | Usually Fits | Sometimes |
| Water at a wall only in wind-driven rain | Sometimes | Usually Fits | Rarely |
| Stains in many rooms at once | Rarely | Sometimes | Usually Fits |
| Leak during snow melt only | Sometimes | Usually Fits | Rarely |
Leak Signs
Signs of a Sioux City Commercial Roof Leak That Needs Repair
Inside the building is where most leaks are first noticed. These are the signs, from watch-and-wait to call now.
Drip Over Stock or EquipmentCall Now
Water landing on inventory, machines, or electrical gear needs a temporary patch and interior protection before the next rain.
Leak Around Rooftop UnitRepair First
Stains below an HVAC curb usually trace to cracked curb flashing, open corner patches, or a failed unit gasket or condensate line.
Roof Leaking After HailRepair First
Hail cracks aged membrane, splits seams, dents metal at the screws, and breaks skylights, and bruised spots can open weeks later.
Stain That Grows Between StormsRepair First
A ring that spreads each rain means water is soaking the insulation, which loses insulating value and stays wet for months.
Rust Spots on the Deck UndersideWatch
Orange streaks on steel deck flutes show where water has been running, often several bays from the visible stain.
Drips Only During Snow MeltWatch
Melting snow backs up behind ice at drains and eaves, then finds open laps and flashing that stay dry in summer rain.
Leak Fixes
Commercial Roof Leak Repair Fixes for Sioux City Roofs
Once the entry point is found, the fix depends on what failed. These are the repairs we make most.
Seam and Lap Closure
Open membrane seams get welded or re-adhered, and metal laps get new sealant or a fabric-reinforced cover.
Hail Damage Repairs
Fractured membrane, split seams, and broken skylights get temporary patches first, then permanent repairs once the damage is photographed.
Drain and Scupper Leaks
Water leaking at a drain often comes from torn flashing at the bowl or a loose clamping ring that lets water under the membrane.
Wall and Coping Leaks
Wind-driven rain that enters under parapet copings gets stopped with resealed joints, new counterflashing, or a coping cap reset.
Wet Insulation Removal
Board soaked by a long-running leak is cut out and replaced so it stops feeding water to the deck and the ceiling below.
Bigger Repairs
When a Sioux City Roof Leak Repair Turns Into a Bigger Job
Most leaks close with one repair. A few point to a wider problem, and the signs are clear on the roof.
| What You Weigh | Repair | Replace |
|---|---|---|
| Leak sources | One entry point found and closed. | New leaks after every storm in different places. |
| Insulation | Wet board limited to the area around the leak. | Moisture readings high across a whole section. |
| Surface | Membrane or panels bond and flex around the repair. | Cracking, shrinking, or rust spread across the field. |
| Storm damage | Bruises and splits in a few spots. | Hail damage across most of the roof surface. |
| Time on site | One visit to trace and repair in most cases. | A planned section or full replacement with a permit. |
Leak Over Inventory or Equipment?
Call, tell us what sits under the drip, and move what you can. A temporary patch keeps water off it while the permanent repair is set up.
Leak Tracing
How Sioux City Commercial Roof Leak Repair Works
Leak repair runs in five stages, and the first two happen before anything is patched.
At The Building
Map Every Stain and Drip
Inside, each stain, drip, and rust streak goes on a floor plan with notes on when it shows up. That map tells us which part of the roof to walk first.
On The Roof
Walk the Roof Above and Upslope
Water runs along deck flutes and insulation joints, so we check above each stain and then upslope toward drains, curbs, and walls until the source turns up.
On The Roof
Confirm the Entry Point
Moisture meters and, when needed, an infrared scan at dusk show where wet insulation marks the water path. A controlled water test can confirm a suspect curb or seam.
On The Roof
Repair the Source and Wet Areas
The failed seam, curb flashing, or drain is repaired with matching material, and wet insulation along the water path is replaced.
Paperwork
Check After the Next Rain
We ask you to look at the stain area after the next storm. Photos of the repair and the floor-plan map stay with you for any follow-up.
Related Repairs
Roof Repairs That Follow a Sioux City Leak Trace
A traced leak often lands on a flat membrane seam, a metal lap, or plant equipment. These services handle each one.
Flat Roof Repair
Traces that end at a split seam, a torn drain flashing, or a ponded low spot lead to a membrane repair on that section.
Flat roof repair in Sioux City
Commercial Metal Roof Repair
Leaks traced to a screw row, dried end lap, or skylight panel are fixed with matching fasteners, sealant, and steel.
Metal roof repair in Sioux City
Industrial Roof Repair
Plant leaks that trace back to fan curbs, pipe supports, or residue-softened membrane get repaired around production.
Industrial roof repair in Sioux CityLeak Questions
Commercial Roof Leak Repair Questions From Sioux City Owners
What owners ask once a stain or drip shows up inside.
Finding Leaks
How to Find a Roof Leak in a Warehouse
Map the drips first, then walk the roof above them. Every stain goes on a floor plan, then we check above each one and upslope, because steel deck carries water along its flutes before it falls. Moisture meters, or an infrared scan at dusk, show wet insulation along the water path.
How Is a Leak Around a Rooftop Unit Repaired?
By rebuilding the curb flashing and checking the unit itself. Curb membrane, counterflashing, and corner patches get inspected for gaps, and unit panels, gaskets, and condensate lines are looked at too. Failed flashing is stripped and rebuilt, and problems inside the unit go to your HVAC contractor.
Storms And Winter
Why Is My Roof Leaking After Hail?
Hail cracks, punctures, or bruises the surface. It fractures aged membrane, splits seams, dents metal at the fasteners, and breaks skylight panels, and some bruised spots open weeks later. We inspect, photograph the damage for your insurance records, and patch to stop water first.
Can a Leak Be Repaired in Winter?
Yes, with cold-weather materials and temporary methods. Snow and ice are cleared from the work area first. Some adhesives need warmer temperatures, so the permanent repair can wait for a mild day while a temporary patch keeps water out.
Cost
What Sets Roof Leak Repair Cost?
How long the trace takes and what the fix needs. Leaks hidden under ballast or insulation take more investigation. Resealing a flashing costs less than rebuilding it or cutting out wet board, and interior protection, after-hours calls, and lifts add to the total.
Hire a Sioux City Commercial Roof Leak Repair Contractor
Tell us where the stain is and what sits under it. We will trace the leak and repair where the water gets in.