Nine months of rain and a moss layer thick enough to plant in will find every weak flashing you own. If your ceiling has a new stain or your composition shingles are curling at year twenty, describe the roof and we'll line up a licensed roofing contractor in Portland to look at it.
A single failed pipe boot is a two-hour repair. A valley that has been leaking quietly into the sheathing is a different conversation. Overlaying new shingles on old is legal in limited cases and almost always the wrong choice on a wet-climate roof, because it hides rotten decking. Ask any bidder what they expect to find under the old layer and how sheathing replacement is priced.
Under our maples and firs, moss holds water against the shingle mat and lifts the edges until granules wash away. Pressure washing strips the roof faster than the weather does. Proper treatment means gentle removal, zinc or copper strips at the ridge, and keeping branches back so the north slope gets some light. Any roofer proposing a pressure washer should be shown the driveway.
Portland's foursquares and bungalows come with steep pitches, dormers, cricket details behind chimneys, and skylights added in the 1980s that nobody has flashed correctly since. Those details are where leaks start, not the middle of a field of shingles. Cheap bids are often cheap because they reuse existing flashing.
Every roofer we match holds active Oregon CCB registration and carries insurance. Just as important, they'll tell you the truth about scheduling: tear-offs need a dry window, and between November and March that window moves. A contractor promising a firm January date in Portland is promising the weather something it hasn't agreed to.
Describe the project once and we match it with vetted local pros who actually do this work — you choose who to hire, or nobody at all.
A full tear-off and replacement requires a permit through Portland Permitting & Development, with inspection of the underlayment and sheathing in many cases. Small repairs generally don't. The permit is also your record at resale that the roof was done to code, which matters more than homeowners expect during inspection negotiations.
Fir needles and big-leaf maple debris fill gutters twice a year here, and an overflowing gutter rots fascia and soaks the wall below. Many Portland homes also drain downspouts into old underground pipes that connect to the sewer lateral or simply stop. Getting the water to daylight or a drywell is often bundled into a reroof for a modest add.
Composition shingles that were only ever asked to handle drizzle now see multi-day stretches above 100 degrees. Attic ventilation — intake at the soffits, exhaust at the ridge — has become a real durability issue, not just a code box to tick. Ask how the new roof will breathe, especially if your attic was insulated without adding baffles.
Architectural composition shingles on a typical Portland house commonly land somewhere between $12,000 and $25,000 for a tear-off and replacement, driven by square footage, pitch, and how many layers come off. Steep, cut-up roofs with dormers price higher per square. Metal and cedar cost considerably more. Sheathing replacement is usually a per-sheet add — get that number in writing before work starts, because it is the line most often used to inflate a low bid mid-job. Small repairs frequently run in the hundreds rather than thousands.
Two bids wanted to overlay. The roofer we hired pulled a corner back, showed me soft sheathing, and explained why a tear-off was the only honest option.
Chimney flashing had been leaking for years. They rebuilt the cricket and the stain on the ceiling finally stopped growing.
The north slope was more moss than shingle. They cleaned it without pressure washing, replaced the broken tabs underneath, and put zinc strips at the ridge so it stops coming back.
Twenty to twenty-five years is the realistic local range for architectural shingles, and less on a shaded north slope that grows moss. Manufacturer warranties assume conditions our wet season doesn't provide, so treat the printed number as optimistic.
Repairs, often yes. A tear-off needs a genuinely dry stretch, because open decking and rain is how a small problem becomes a ceiling collapse. Good roofers stage tear-offs in sections and tarp aggressively, but they'll still reschedule when the forecast turns.
On a roof with life left in it, yes — it's far cheaper than losing five years off the shingles. On a roof already at end of life, spending on moss removal mostly delays a decision you've already made.
Wind and falling-limb damage is commonly covered; wear, moss, and age are not. Photograph the damage before any tarping, keep the contractor's written assessment, and file promptly. Ice-storm and windstorm weeks generate a lot of claims and adjusters get slow.
Tell us what you're seeing — stains, curling shingles, moss, or just an old roof. We'll match you with Portland roofers for free, itemized bids.
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