Great system, and a great team. Victor, Daniel, and Patrick were very professional and thorough during the installation. The roof looks and performs great.
— Jason F., Portland, OR
Polk County, OR
Polk County pairs West Salem's established neighborhoods with the farm and timber country running out to Dallas, Monmouth and the Coast Range foothills. It shares the valley's defining roofing problem — rain and moss that age composition roofs fast — and its homeowners' defining frustration: paying for the same roof twice. An interlocking aluminum roof is the once-and-done answer, with a surface moss can't colonize and a warranty that transfers if you sell.
★ 4.8 average from 600 Oregon homeowner reviews
Oregon line: (503) 966-2948 · Toll-free 1-866-733-5811
Our job book records 32 completed Interlock® roofs in the Polk County towns listed on this page, the first in 2002, the most in Dallas, Monmouth and Willamina. We serve the county from our Portland office.
Ten-year averages for Polk County: about 48 inches of rain and 9 inches of snow a year, a mean temperature near 53°F, gusts recorded to 63 mph, and roughly 40 freeze-thaw days. The last two decide how long a roof covering lasts here, and they are the two figures almost nobody quotes a homeowner.
The valley's wet season runs long enough to keep a north slope damp most of the year, and moss roots between asphalt granules, holds water against the mat, and lifts each tab as it grows. That is the failure mode in Polk County — not a storm, but fifteen quiet years and a wash-and-treat bill every few seasons. Smooth interlocked aluminum gives moss nothing to grip, sheds no granules, and needs no treatment schedule.
Freezing on its own does not damage a roof. Freezing and thawing does, and Polk County crosses that line roughly 40 times a year. Every cycle drives water into a seam, expands it, and reopens it slightly wider. Interlock carries no sealant beads doing the waterproofing and no exposed gaskets to age, so there is nothing for that cycle to work on.
Wind damage is a covering problem, not a structural one — which is why it shows up as missing shingles rather than a failed roof. Asphalt depends on an adhesive strip holding a free tab edge down, and once one lifts its neighbors are exposed in turn. Every Interlock panel locks to its neighbors on all four sides with concealed fasteners, so there is no free edge for a gust to get under and no fastener head sitting out in the weather. Wind resistance is warranted to 120 mph installed to manufacturer specification.
Gallery
Real homes, photographed after completion, Polk County towns first.

Willamina, OR
Tudor Brown

Willamina, OR
Tudor Brown

Willamina, OR
Tudor Brown

Willamina, OR
Tudor Brown

Willamina, OR
Tudor Brown

Willamina, OR
Tudor Brown

Willamina, OR
Tudor Brown

Willamina, OR
Tudor Brown
Reviews
Great system, and a great team. Victor, Daniel, and Patrick were very professional and thorough during the installation. The roof looks and performs great.
— Jason F., Portland, OR
Worked with Patrick and his team to replace my roof, rain gutters & skylights. Couldn’t be happier with the results. Love the new roof.
— Ben Y., Portland, OR
Awesome! Professional crew from start to finish! Thank you Victor, Daniel, Anna, and Patrick! We love the results and the lifetime warranty!
— Constance J., Portland, OR
Our new Interlock Roof is beautiful. And our neighbors have noticed. The whole process was very professional from beginning to finish. Victor, Daniel and Patrick were incredibly efficient, courteous, knowledgeable, and hard-working. Would recommend highly.
— Connie A., Oregon City, OR
Our new Interlock Roof is beautiful. And our neighbors have noticed. The whole process was very professional from beginning to finish. Victor, Daniel and Patrick were incredibly efficient, courteous, knowledgeable, and hard-working. Would recommend highly.
— Connie A., Oregon City, OR
Crew was amazing, we had one main house roof and two porch roofs that needed to be done fast and before the rain and they handled it well! Our metal roof got finished in two days and they came back out again to clean up on the third day and wrap up everything. We highly recommend them and their service as everything turned out great! Edit: I forgot to mention, we worked with a few different people but I believe it was Patrick and his crew whom helped us
— Erika C., Wilsonville, OR
Oregon contractors must be licensed by the Construction Contractors Board. Interlock Metal Roofing (PNW) Inc. holds Oregon Construction Contractors Board (CCB) License #130826. Look up any roofer before you sign: Oregon CCB contractor search.
Older homes can have lead paint on trim, fascia and soffits, which roofing work can disturb. We hold the Oregon Lead-Based Paint Renovation (LBPR) Contractor License, LBPR-130826. What lead-safe roofing involves.
The manufacturer's Guardian Lifetime Limited Material Warranty covers the material and finish for the original purchaser while they own the home, transferable once. Workmanship is not part of it.
The consultation is free, on Zoom or at your home. We measure the roof, go through profiles and colors with you, and you get a written price. Call (503) 966-2948 or book a time.
Airlie, Ballston, Bethel, Black Rock, Bridgeport, Buell, Falls City, Fir Grove, Guthrie, Kings Valley, Lewisville, Luckiamute, McCoy, Pedee, Perrydale, Rickreall, Ruth, Salt Creek, Suver, Valsetz, West Salem, Willamina, Dallas, Monmouth, Independence
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