Roofing & Siding Contractors in Oregon
Licensed roofing and siding contractors serving Portland, Eugene, Salem, Bend, and communities statewide. Oregon's heavy Pacific rainfall, aggressive moss and algae growth, winter windstorm exposure, and a large inventory of older wood-framed homes create year-round demand for expert exterior contractors throughout the Willamette Valley, Coast Range, and Cascades.
Oregon Roofing — Pacific Rainfall, Aggressive Moss Growth, Winter Windstorms, and the Willamette Valley's Aging Housing Stock
Oregon's roofing environment is defined by the Pacific Northwest's unique combination of heavy winter rainfall, mild temperatures that enable year-round biological growth, and periodic severe windstorms that cause acute damage. The Willamette Valley — home to Portland, Salem, and Eugene — averages 37–44 inches of annual rainfall with most precipitation falling October through April. This sustained rainfall season, combined with mild temperatures rarely dropping below 25°F in the valley, creates ideal conditions for moss, algae, and lichen to colonize asphalt shingles — a problem unique in its severity to the Pacific Northwest. Oregon moss growth begins within 5–7 years on north-facing and shaded roof surfaces; unaddressed moss retains moisture, accelerates shingle granule loss, and can reduce a 30-year shingle to 15-year effective life. Oregon's windstorm history is significant: the October 12, 1962 Columbus Day Storm — the most powerful extratropical cyclone to strike the continental US in the 20th century — produced sustained winds of 100+ mph and gusts of 127–180 mph across the Oregon Coast and Willamette Valley, destroying enormous numbers of roofs and trees. Oregon experiences annual Pacific storm events with 50–70 mph gusts November through March. The coast receives additional marine exposure — salt air, higher rainfall (60–80 inches annually in coastal communities), and direct Pacific storm energy. The Cascades and eastern Oregon present distinct climates: snow loads on the west slope of the Cascades (Government Camp, Ashland, Medford) versus dry high desert (Bend, Redmond, Klamath Falls) with cold winters and occasional significant snowfall.
Our Services
Roof Replacement
Full tear-off and replacement. Zinc or copper moss-prevention strips recommended for all Oregon roof replacements; Pacific storm wind-rated installations; moss treatment service available. Manufacturer warranties, licensed crews.
Roof Repair
Leak diagnosis, flashing repair, storm and wind damage repair. Emergency response available across Oregon.
Siding Replacement
Vinyl, fiber cement, and engineered wood siding selected for Oregon's specific climate.
Gutters
Seamless aluminum gutters and guards engineered for Oregon's rainfall and weather patterns.
Storm Damage
Insurance claim support for wind, hail, tornado, and ice storm damage. Documented scope, direct insurer coordination.
Windows
Energy-efficient replacement windows optimized for Oregon's climate — reducing heat transfer and improving storm resilience.
Areas We Serve in Oregon
- Portland
- Eugene
- Salem
- Bend
- Medford
- Gresham
- Hillsboro
- Beaverton
Frequently Asked Questions — Oregon
How serious is moss growth on Oregon roofs?
Oregon moss growth is among the most aggressive in the US. The Pacific Northwest's mild, wet climate — especially in the Willamette Valley and on the Coast — creates ideal conditions for moss, algae, and lichen. Moss attaches to shingles with root-like structures (rhizoids) that penetrate between granules and into the shingle substrate, lifting granules and creating pathways for moisture intrusion. A moss-covered north-facing Oregon roof holds moisture continuously during the 5–6 month rain season, dramatically accelerating shingle wear. Unaddressed moss can reduce a 30-year shingle to 15–18 years of effective life. We recommend zinc or copper ridge strips on all Oregon replacements — zinc and copper ions wash down with rainfall and inhibit moss formation.
What windstorms should Oregon homeowners know about?
Oregon's worst documented windstorm is the October 12, 1962 Columbus Day Storm — a North Pacific typhoon remnant that struck the Oregon and Washington coasts with unprecedented intensity, producing winds of 127 mph at Corvallis and gusts documented at 180 mph on the coast. It remains the most powerful extratropical storm in 20th century North American history. Beyond this historical benchmark, Oregon experiences 1–3 significant wind events per winter (December through March) with gusts of 50–70 mph in the Willamette Valley and 80–100 mph on the coast, causing roof damage, falling trees, and soffit/fascia destruction every year.
How does eastern Oregon differ from western Oregon for roofing?
Eastern Oregon (Bend, Redmond, Prineville, Klamath Falls, Enterprise) has a high desert climate dramatically different from the Willamette Valley. Eastern Oregon receives 10–14 inches of annual rainfall, gets significant snowfall in winter (Bend averages 30 inches), and experiences extreme temperature swings (-10°F winters to 100°F summers) that cause thermal cycling damage to roofing materials. Moss is not a problem in eastern Oregon, but UV exposure, thermal cycling, and snow load are the primary drivers. Bend's rapid growth has created a large 2000s–2020s housing inventory.
More Service Areas Near Oregon
Portland OR · Idaho · Washington · California
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