If You Stop At The Symptom:
- Patch the interior, the cause remains.
- No understanding of the cause and the assembly.
- Issue most likely to recur.
Commercial Roofing in OR & WA Along the I-5 Corridor
Your Partner in Flat Roof Management!
We diagnose the whole roof assembly before recommending a fix — so you can decide with confidence, not guesswork.
5.0 Google rating · 65 reviews GE ENDURIS · IB ROOF · TUF-DEK CERTIFIED!
ASSESSMENT / 01What would you like inspected?
ROOF FAILURE / 02
Most commercial roof failures start way before the first drop reaches the floor.
On flat and low-slope roofs, the membrane is only one layer. Long-term performance also depends on drainage, deck condition, insulation, seams, penetrations, moisture, and the decisions made around all of them.
- 01Drainage + ponding
Where water collects and why it stays.
- 02Deck + substrate
What the visible surface cannot tell you.
- 03Insulation + moisture
Trapped moisture, sweating, and thermal risk.
- 04Seams + penetrations
The details where recurring leaks often begin.
- 05Repairability + life
What can be saved—and what should not be patched again.
DIAGNOSIS / 03
The Roof Is A Whole System
Gathering The Proper Intel.
- How It’s Built: Structure, deck, insulation, fire rated, membrane + drainage.
- Eligibility and remaining service life.
- Clear path to: Maintain, repair, restore, overlay or complete replacement.
“Building it right is the standard.”
SERVICE DIRECTORY / 04
One roof partner for the life of your roof!
Each scope starts with the property, the roof system, and the condition — captured in photos, dates, and notes, not a generic package or a predetermined answer.
ACTIVE WATER ENTRY
Emergency
Business-hours triage for active commercial leaks, followed by a condition-based response when location, weather, access, and crew availability allow.
Triage · Locate · Stabilize · DocumentReview service
TARGETED SCOPE
Repair
Repair seams, flashing, penetrations, drainage details, membrane damage, and other defined failure points without treating the visible symptom as the whole diagnosis.
TPO · PVC · EPDM · Mod-bit · BUR · MetalReview service
SERVICE-LIFE PATH
Restore
Evaluate whether an existing flat or low-slope roof is a suitable candidate for cleaning, preparation, detail work, reinforcement, and a compatible restoration system.
Condition-led · Moisture-aware · Detail-firstReview service
NEW ROOF LAYER
Overlay
Where the existing assembly, moisture condition, structure, drainage, and applicable requirements support it, add a planned roof layer without defaulting to full tear-off.
Assessment required · Project-specificReview service
FULL CAPITAL SCOPE
Replace
Remove and rebuild the roof assembly when widespread failure, trapped moisture, deteriorated materials, or the building plan makes replacement the responsible direction.
Tear-off · Deck review · New assemblyReview service
ROOF MANAGEMENT
Maintain
Create a repeatable inspection, documentation, housekeeping, drainage, and repair workflow around the property instead of waiting for the next leak call.
Planned cadence · Findings · PrioritiesReview service
WALKABLE ROOF DECKS
TUF-DEK
Assess and install TUF-DEK walkable waterproof deck systems as a TUF-DEK Certified contractor, with substrate, drainage, seams, edges, and transitions planned around the property.
TUF-DEK Certified · Walkable waterproofingReview service
PROPERTY FIT / 05
Roof failures show up on your P&L, not just your ceiling.
Flat Roof LLC protects what matters to everyone with a stake in the building — from ownership and investment to the people who occupy it every day.
Discuss my propertyWarehouses
Industrial
Retail centers
Churches
Apartments + hotels
Commercial projects
CONTROLLED PROCESS / 06
From roof problem to documented next move.
- 01
Request
Tell us what is happening and where the property is.
- 02
Assess
Schedule an evaluation of the roof and surrounding assembly.
- 03
Document
Understand findings, condition, urgency, and viable options.
- 04
Decide
Choose repair, restoration, overlay, or replacement with context.
- 05
Execute
Coordinate proposal, financing, scheduling, and communication.
PROOF / 07
Specialized systems. Accountable work.
Flat Roof LLC brings commercial roofing focus, deep flat and low-slope experience, responsive communication, emergency support, and practical system knowledge across repair, restoration, and replacement work.
GE
System experienceIB ROOF
System experienceTUF-DEK
Certified installerOR + WA
Licensed
System experienceIB ROOF
System experienceTUF-DEK
Certified installerOR + WA
Licensed
Google reviewsView the Google profileRating and count verified July 13, 2026
CUSTOMER REPORTS / GOOGLE
Read all reviews on GoogleWork verified by the people under the roof.
- Rated 5 out of 5Google review
“This company is great. We had them work on our 100 year old house which had a flat roof section that needed a long overdue rehab. They performed the work on time and on budget and we experienced clear communications throughout the job. We highly recommend Flat Roof LLC.”
- Rated 5 out of 5Google review
“Flat Roof LLC is awesome! We had a leak in a complicated flat roof, patio, brick and mortar, etc. situation that they were able to assess and address the same day I called them, which was incredible. They are very friendly, professional, and ethical. I cannot recommend this company enough - five stars isn't enough!”
Read 4 more Google reviews
- Rated 5 out of 5Google review
“I have used Alex and his crew multiple times. They are the only ones I trust with my membrane roof. Their service and work has always been top notch. I cannot recommend them enough.”
- Rated 5 out of 5Google review
“Found a few leaking spots in my attic, and immediately called Flat Roof LLC. They came out very quickly gave me a free estimate on the spot. Their pricing is extremely reasonable and their work quality is top tier. Highly recommended this company. Good people and even better work.”
- Rated 5 out of 5Google review
“We were thrilled with the communication, timeliness and quality of two flat roof jobs that Flat Roof LLC did for us recently. Highly recommend!”
- Rated 5 out of 5Google review
“Hired FlatRoof LLC company to do membrane on our decks and balconies on an apartment complex. Very satisfied with final product and it was a very good solution in occupied by tenants apartments. Flat roof guys were able to install membrane and foot traffic was allowed same day/hour.”
SERVICE CORRIDOR / 08
Commercial roofing along the I-5 corridor.
Flat Roof LLC serves commercial properties from Salem, Oregon through Portland and Vancouver to Centralia and Olympia, Washington.
Salem, ORPortland, ORVancouver, WACentralia, WAOlympia, WA
Protect the property now. Preserve working capital.
Qualified property owners can use third-party financing to move necessary roof work forward before delay creates more damage and disruption.
Ask about financingMake the next problem predictable—not expensive.
Annual, bi-annual, and quarterly inspection options help catch drainage, flashing, seam, membrane, and penetration risks earlier.
Review maintenance plansFLAT ROOF LLC / 11
Your partner in commercial roof management.
Owner Alex Koyev is building a culture of excellence around the details that determine whether a commercial roof performs—along with clear communication before, during, and after the work.
Meet Flat Roof LLCSTART HERE / 12
Get a clear plan before the roof becomes a bigger problem.
Request a roof assessment or call now if water is actively entering the building.
Emergency leak help(971) 339-4299ROOF ASSESSMENTTell us about the property.Required fields are marked with an asterisk.