Commercial roof repair for Portland properties
A drip over a register, a server room or a stack of inventory can't wait. We respond to commercial roof leaks around Portland, stop the water, and make lasting repairs with as little disruption to tenants as possible.
Commercial roof repair in Portland typically costs $485 to $1,340 for a leak call with a membrane or flashing repair, and $1,860 to $6,780 for larger sections with wet insulation, drain work or curb rebuilds. We answer 24/7. The first visit stops active water; the permanent repair follows in the next dry window, matched to your existing TPO, EPDM, modified bitumen, built-up or metal roof.
Commercial roof leaks have a cost beyond the roof itself. Wet ceiling tiles fall, inventory gets ruined, a restaurant closes a section of tables, or a tenant calls the property manager three times in one afternoon. The job is to get water stopped fast, figure out where it's really coming from, and fix it so the same call doesn't come in after the next storm.
We repair roofs on retail centers, offices, warehouses, restaurants, medical buildings, churches and mixed-use properties. Most leaks we find come from rooftop unit curbs, drains, failed seams, parapet flashing and punctures from service traffic. We work with property managers and building engineers, coordinate roof access, and keep work quiet and contained so tenants can keep running their businesses.
What causes most leaks on Portland commercial roofs?
These are the problems we find most often when we get called to a commercial roof.
HVAC curbs and rooftop units
Rooftop units vibrate, get serviced often, and sit on curbs with complex flashing. Cracked corners, loose counterflashing and condensate lines dumping onto the membrane cause a large share of commercial leak calls.
Clogged interior drains
When an interior drain fills with fir needles, moss and debris, water backs up and finds the weakest seam nearby. A single blocked drain can put inches of water on a section of roof.
Punctures from service traffic
Dropped tools, screws left behind and boots on soft membrane create small holes that leak for months. Areas around HVAC units and roof hatches take the most abuse.
Parapet and coping failures
Loose coping caps and cracked parapet flashing let water into walls. It often shows up as stains or bubbling paint on interior walls far below the roof.
Aging seams and laps
Older EPDM seams, TPO welds that were never probed, and lifted modified bitumen laps open over time. Wind driven rain pushes water straight through those gaps.
Loose fasteners on metal roofs
Exposed fastener metal roofs on warehouses and shops leak at screws as washers dry out and panels expand and contract. Rust around fasteners is the warning sign.
How we handle commercial leak calls with minimal disruption
Respond and stop water
We answer 24/7. On an active leak, a roofer clears drains, seals the obvious opening and places temporary protection. Inside, we help locate the leak path so tenants can protect equipment and inventory.
Coordinate access and safety
We work with property managers on roof access, keys, hatch use and safety. Ladders, materials and debris stay out of customer areas and entries, and we schedule noisy work around tenant hours.
Trace the leak to its source
We follow staining on the deck and insulation, probe seams, check curbs and drains, and flood test sections when needed. On large roofs, an infrared or moisture survey maps wet insulation precisely.
Repair with matching materials
TPO patches and flashing are heat-welded, EPDM gets primer and seam tape, modified bitumen gets new plies, and metal roofs get new fasteners and sealed laps. Wet insulation is cut out and replaced.
Fix drainage contributing to leaks
Drains get new strainers, clamping rings or sumps, scuppers are enlarged, and crickets are added behind units that dam water. Repairs last longer when water moves off the roof quickly.
Report with photos
Property managers receive a short report with photos of the problem, the repair, and any other issues we saw on the roof. That helps with budgeting and tenant communication.
Commercial roof leaks in Portland's wet season
Most commercial leak calls come between November and March, when steady rain finds every weak spot and drains clog with debris. In the Central Eastside and around the industrial area under the St. Johns Bridge, warehouses with large roofs and few drains can collect a lot of water in a short time. Clearing drains before the first big storms and adding strainers prevents many emergency calls.
Retail buildings and offices in Beaverton, Tigard and Gresham often have rooftop units serviced several times a year, and service traffic is a common cause of punctures. In Vancouver and along I-205, east wind pushes rain sideways into parapets and curb flashing. We look at those details first on leak calls, and we suggest walkway pads where foot traffic is wearing down the membrane.
Materials for commercial roof repair come from manufacturers such as Malarkey, GAF, Owens Corning, CertainTeed, Carlisle and Velux, chosen for the job rather than the logo.
Which repair approach fits your commercial roof?
The right repair depends on how widespread the problem is and how much life the roof has left.
Emergency leak stop
Temporary seal, drain clearing and interior protection to stop active water during a storm. It buys time until conditions allow a permanent repair, usually within days.
Targeted membrane and flashing repair
Permanent repair at the source, using matching materials. Most commercial leaks are resolved this way when the rest of the roof is in reasonable shape.
Curb and drain rebuild
Full reflashing of HVAC curbs, new drain components or added crickets. These repairs address the most common recurring leak sources on commercial roofs.
Maintenance program
Spring and fall visits to clear drains, check seams and flashing, and fix small issues before they leak. It suits property managers who want fewer emergency calls and a clear roof history.
Restoration or replacement planning
When repairs are frequent and moisture surveys show wide damage, we help plan a coating or replacement and keep the roof sound in the meantime.
How much does commercial roof repair cost in Portland?
These typical 2026 ranges reflect commercial leak repairs in the Portland metro. After hours calls and large wet areas add cost.
| Work | Typical Portland range |
|---|---|
| Leak call with seam or flashing repairper visit | $485 to $1,340 |
| HVAC curb reflashingper curb | $715 to $1,860 |
| Drain repair or new strainer and ringper drain | $395 to $1,280 |
| Wet insulation section replacementper section | $1,860 to $6,780 |
| Infrared or moisture surveyper roof | $685 to $2,140 |
| Metal roof fastener replacementper sq ft | $2.35 to $4.65 |
These are typical Portland ranges, not a quote. The real cost comes after we inspect the roof and give you a written estimate.
What moves the price:
- Roof system and age
- Size of wet area
- Access, height and hatch
- After hours or emergency timing
- Number of curbs and drains
- Tenant scheduling needs
Why property managers call us for commercial leaks
Answered any hour
Call (503) 917-5484 day or night. Leaks during weekend storms get a response, not a voicemail box that waits until Monday morning.
Source found, not guessed
We trace water to where it actually enters, using probes, flood tests and moisture surveys. That stops the cycle of patching the wrong spot.
Tenants kept working
We coordinate access, keep materials out of customer areas and schedule noisy work carefully. Businesses below keep operating while we repair the roof above.
Clear reports with photos
Each visit ends with photos and notes on what we fixed and what to watch. Property managers can share them with owners and tenants.
Commercial Roof Repair questions from Portland homeowners
How fast can you respond to a commercial roof leak in Portland?
We answer 24/7 and send a roofer as soon as conditions allow. On an active leak, the first goal is to stop water and protect what's below. Permanent repairs are scheduled for the next dry window, which in winter may be within a day or two.
Can you repair a commercial roof in Portland without disturbing tenants?
Yes, in most cases. Repairs are usually quiet and contained to a section of roof. We coordinate access through property managers, keep ladders and debris away from entries, and schedule louder work like cutting out wet insulation before or after business hours.
Why does my Portland commercial roof leak near the HVAC unit?
Rooftop units are the most common leak source on commercial roofs. Curb flashing cracks from vibration and service traffic, condensate lines may discharge onto the membrane, and units can dam water behind them. Reflashing the curb and adding a cricket usually fixes it.
Should I repair or replace my Portland commercial roof?
If leaks come from a few specific details and the insulation is mostly dry, repair makes sense. If moisture surveys show widespread wet insulation or leaks keep appearing in new places, replacement or a coating may cost less long term. We show you the survey results before you decide.
Do you offer maintenance plans for commercial roofs in Portland?
Yes. Most property managers choose spring and fall visits. We clear drains and scuppers, check seams and curbs, fix minor issues on the spot and send a photo report. Regular maintenance cuts down on emergency calls during the wet season.
What types of commercial roofs do you repair in Portland?
We repair TPO, EPDM, modified bitumen, built-up tar and gravel, metal and coated roofs. Each system gets repairs with compatible materials, like welded TPO patches or taped EPDM seams, so the repair bonds and lasts.
Where we do this work most
We cover the whole metro. These are the places we are on roofs most often:
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Need commercial roof repair in Portland?
Call and tell us what you are seeing. We answer 24/7 and can usually talk you through the next step on the first call.