Excellent work! Knows how to price out a project and execute at a very high level of professionalism.
Commercial Roofing
Most roofers who bid your building aren't certified to be on it.
We are, by GAF and by Mule-Hide. You get photos of every seam and drain before you sign, and photos from the roof every day the crew is up there.
- Oregon CCB #219931Licensed, bonded & insured
GAF CertifiedResidential & commercial- CertainTeedCertainTeed SELECT ShingleMasterResidential & commercial
- 4.5 36 Google reviews
- Since 2017Same company, same address
Sound familiar?
A commercial roof fails quietly, then all at once.
- Ponding water that's still there two days after the rain.
- A stain on a ceiling tile that comes back after every patch.
- Seams lifting. Flashing pulling away from the parapet.
- A tenant who has called twice about the same leak.
- The last roofer patched it, and nobody has a photo of what's under the patch.
- Three bids, and none of them say which manufacturer certifies the installer.
How we look at it
Before we quote a building, we document it.
We walk the whole roof and photograph every seam, drain, penetration and run of flashing. Where we can get under the deck, we go, with a light and a camera. If water has been getting in, the deck shows it before the ceiling does.
Then we scan the roof with an infrared camera after sunset. Wet insulation holds the day's heat longer than dry insulation, so trapped water shows up as its own shape on the screen. You see exactly which sections are wet, so you repair those instead of paying to tear off the whole roof.
You get the report with the photos, whether you hire us or not. If the roof has years left, it says so. If a repair will hold, it says that. If it won't, you see why.
What we install
Low-slope, steep-slope, and the repairs in between.
Low-slope and flat systems
Low-slope systems from GAF and Mule-Hide, installed by the crew those manufacturers certified. The warranty is registered with them, in your building's name.
Steep-slope commercial
Shingle roofs on commercial buildings. The same eight-layer system as our residential work, with the decking price locked before tear-off.
Repairs and leak response
Leak now? We're on the roof within 2 hours. Photos of what we found, price in writing, then the repair.
Decking, the honest way
Rotten deck sections are photographed before they come out. You pay for the ones that were bad, not for a guess.
Why the certification matters
You can't get certified for commercial work by filling out a form.
- GAF and Mule-Hide certify a contractor for commercial work after seeing the volume installed. Most residential roofers in this market never qualify.
- A certified install is what lets the manufacturer register the warranty in your building's name. Without it, the only warranty is the roofer's word.
- Oregon CCB #219931. Same company, same address since 2017: 4198 River Rd N, Keizer.
- Photos from the roof every day the crew is up there, and one named contact who tells you where you are in line.
Repair, restore, or replace
Sometimes the answer is a repair. We'll say so.
Building owners get sold full tear-offs on roofs that needed a drain cleared and a seam resealed. We'd rather show you the photos and lose the job than win it because you couldn't see your own roof.
If it does need replacing, the bid says exactly what goes on the building, layer by layer, and the schedule is in the contract before we start.
How a commercial job runs
You always know what's happening on your roof.
- Inspection with photos of every seam, drain and penetration, plus an infrared moisture scan. Report within 24 hours.
- A bid you can read: the system, the layers, the schedule and the payment terms, in writing.
- 35% at signing. Your material gets ordered and you get your start date.
- Install days: photos from the roof, the same day, to one named contact on your side.
- Walkthrough with photos of the finished system. Manufacturer warranty registered for the building.
Recent roofs
The same crew. The same standard.
Recent roofs from our crew across the Portland metro. Look at the ridge, the flashing and the valleys, then look for the same things in anyone else's photos.
Tap any photo to see it full size.
Schedule My Free Roof Inspection
Photos are from our own jobs across the Portland metro.
Proof, not adjectives
Commercial roofs we've done. Reviews you can check.
Samao Builds Co.March 2026 Cindy MeyerJune 2026 Black Diamond Roofing did a complete tear off and replacement of my shingle roof. I got bids from 8 companies and Black Diamond's bid was in the middle but the warranty they offer was exceptional. The project took 2.5 days. They did a fabulous job on the roof and left the property as clean as they found it. I would definitely recommend.
Kevin BiggersApril 2026 My experience with Black Diamond was fantastic. I went with them after getting a number of bids. The product they use and the addition of a ridgeline vent set them apart and they were also cheaper than some of the other quotes I got. The installation crew was fantastic and completed the entire project in 2 days, even after being down a guy on the first day. All in all,a great experience.
Eddie BrambilaFebruary 2026 I had a leak coming through a pipe flashing on a cold, windy, rainy night in January. I called Black Dimond Roofing at 7 PM, and Rodrigo had his team at my house by 8:30 PM. They quickly identified the issue and secured the area with a tarp that same night. After comparing their quote with three others, I found them very reasonable. Most importantly, Rodrigo showed up when I truly needed help. I highly recommend Black Dimond Roofing.
Jim DunsheeJune 2026 Great job, they more damage than expected and kept us updated on all the necessary repairs I would recommend Black Diamond to anyone who is wanting a quality roof
Cheri PapiniApril 2026 Blackb Diamond Roofing and their staff did an excellent job on meeting their deadline, quality of their work and clean up after completion.
Fernando Lopez2025 Black Diamond came out to give me an estimate on roof replacement, it's something I had been wanting/needing to do for a bit. They were able to work with me and my time lone to get it done. They were professional and very helpful. My roof looks great and I am glad I don't have to worry about that for the next 30 years.😅 Thanks BDR Team.
Michael Hseih2025 Had the free inspection appointment from a cold call since they were coming to the neighborhood to work on a neighbor's roof. Erick Cruz was the one that came. He was punctual and clear in communication on ETA ahead of the appointment, gave me an honest feedback on the status of my roof, and some tips on safety if I'd want to go on the roof myself. Overall had a pleasant experience with Erick and Blackdiamond roofing.
Sheyla EstradaMarch 2026 They were super professional, efficient and clean. We would recommend their services to our Family,friends, and neighbors.
Verify us Oregon CCB #219931 — look us up.
Questions from building owners
What does “commercial certified” actually mean?
You can't get certified for commercial work by filling out a form. GAF and Mule-Hide want to see the volume installed first. Most residential roofers in this market never qualify. Ask any roofer bidding your building which manufacturer certifies them for commercial work, then look it up.
What commercial systems do you install?
Low-slope and flat systems from GAF and Mule-Hide, and shingle roofs on commercial buildings. We're certified by both manufacturers for commercial work, which means the warranty is registered with them, not just with us.
Is the inspection free for a commercial building?
Yes. We walk the whole roof and document every seam, drain and penetration with photos. You keep the report whether you hire us or not.
Will the job get in the way of my business?
You know the start date and where you are in line before we begin, and you get photos from the roof every day the crew is up there. If there's a time we can't be on your roof, tell us before we schedule.
We have a leak in the building right now.
Call (541) 961-6524. We're on the roof within 2 hours, and you get a price in writing before we fix anything.
Free Roof Inspection
See what's actually happening on your building's roof.
Schedule your Free Roof Inspection and you'll get the Attic-First Roof Report within 24 hours. Yours to keep either way.
Schedule My Free Roof Inspectionor call (541) 961-6524
You'll need to be home. The attic part doesn't work without you.