Roofing & Siding Contractors in Portland
Roofing and siding contractors in Portland and Metro. Portland's 143-day annual rainfall season, atmospheric river events, and large aging Craftsman housing stock make it one of the Pacific Northwest's most active roofing markets.
Portland Roofing — 143 Rainy Days, Atmospheric Rivers, and the City's Aging Craftsman Stock
Portland receives an average of 36 inches of rainfall per year spread across 143 rainy days — more rainy days than Seattle — concentrated in the October–May wet season. The city sits in the path of Pacific atmospheric rivers that can deliver 3–5 inches of rain in 48 hours, overwhelming gutters and saturating fascias. Portland's housing stock is characterized by a large inventory of early-20th-century Craftsman bungalows, Victorian-era homes, and 1940s–1960s ranches in neighborhoods like Sellwood, Alberta Arts District, Buckman, and Irvington — many with original or multi-generation roofing systems. The inner suburbs (Beaverton, Gresham, Lake Oswego, Tigard) add large 1970s–1990s inventories. Portland's moss problem is severe: mild temperatures, high rainfall, and large tree canopy create ideal conditions for growth that shortens asphalt shingle life by 30–50% if untreated.
Our Services
Roof Replacement
Full tear-off and replacement. Moss-resistant shingles and annual treatment programs recommended; Craftsman geometry requires careful multi-point flashing. Manufacturer warranties, licensed crews.
Roof Repair
Leak diagnosis, flashing repair, moss and algae treatment, storm and wind damage repair. Emergency response available.
Siding Replacement
Vinyl, fiber cement, and engineered wood siding selected for Portland's climate — UV exposure, moisture, and thermal cycling.
Gutters
Seamless aluminum gutters and gutter guards — critical for managing Portland's rainfall, atmospheric rivers, and debris loading.
Storm Damage
Insurance claim support for wind, rain, wildfire ember, and storm damage. Documented scope, direct insurer coordination.
Windows
Energy-efficient replacement windows with Low-E glass. Reduces solar heat gain and heat loss across Portland's climate zones.
Areas We Serve in Portland
- Sellwood
- Hawthorne
- Alberta Arts
- Irvington
- Concordia
- St. Johns
- Beaverton
- Lake Oswego
Frequently Asked Questions — Portland
What's the moss situation like in Portland?
Portland's combination of mild temperatures, 143 rainy days, and heavy tree canopy creates near-perfect conditions for moss and lichen growth. Moss traps moisture against shingles, accelerates granule loss, and can reduce a 25-year shingle's effective life to 15 years or less if untreated. We recommend annual moss treatment, copper or zinc strip at the ridge, and twice-yearly gutter cleaning.
Portland's Craftsman homes — what roofing considerations apply?
Portland's early-20th-century Craftsman bungalows often have complex roof geometry — multiple hips, dormers, and wide overhanging eaves — that require more flashing detail than simple gable roofs. Many have original cedar shake underlayment or multiple layers of previous roofing that need full tear-off before new installation.
Do you handle emergency tarping after Portland wind or storm events?
Yes — Portland's atmospheric river events and occasional windstorms can cause immediate roof breaches. We offer emergency tarping and documented scope for insurance purposes after storm events.
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