Roofing and roof repairs

Portland roofing takes a beating that most of the country never sees. With more than 36 inches of rain in an average year — and closer to 43 in wetter cycles — every shingle, flashing detail, and ventilation path on your roof works harder than it would anywhere east of the Cascades. Moss and algae colonize north-facing slopes within a few seasons. Freeze-thaw cycles crack compromised shingles during January cold snaps. Wind gusts through the Columbia Gorge corridor peel back ridge caps and lift poorly fastened edge metal. And sustained Pacific Northwest humidity traps moisture inside poorly ventilated attics, rotting decking from the inside out before you ever see a stain on the ceiling.

Boss PDX is a licensed Oregon general contractor (CCB #232383) and registered Washington contractor (BOSSPPL793RN). We coordinate roofing specialists from our vetted trade partner network on every job — residential tear-offs, commercial re-roofs, emergency leak repairs. We write a fixed scope of work before anything starts, so the number you're quoted is the number you pay.

Ready to get a written roof estimate? Request your free estimate or call 844-BOSS-PDX.

Roofing Services We Handle in Portland

We manage residential and commercial roof replacement, repair, and inspection across the Portland metro — Portland, Lake Oswego, West Linn, Wilsonville, Tualatin, Tigard, Sherwood, Newberg, McMinnville, and Lincoln City. As the general contractor, we scope the job, pull permits where required through Portland's Bureau of Development Services (BDS) or the relevant local jurisdiction, and bring in the right roofing specialist from our trade partner network to execute it. You get one point of contact and one written scope — not a subcontractor you're chasing down for updates.

Our roofing services include:

• Full roof tear-off and replacement (composition shingle, architectural shingle, metal, flat/TPO)
• Targeted roof repairs — flashing replacement, valley repair, ridge cap resecure, skylight resealing
• Moss and algae remediation with zinc or copper strip installation
• Emergency leak response and tarping
• Commercial re-roofing — TPO, EPDM, modified bitumen, built-up roofing
• Roof ventilation upgrades — ridge vents, soffit vents, powered exhaust fans
• Gutter integration and downspout routing tied to the roof system
• Attic insulation and weatherproofing coordinated with the roof project

Why Portland's Climate Makes Roofing Different

Portland doesn't get dramatic hurricanes or hailstorms — it gets relentless, sustained moisture. That's harder on a roof system than the occasional catastrophic event, because the damage accumulates slowly and silently.

Rain and Moisture Exposure

Portland averages more than 36 inches of rain annually, with some years pushing past 43 inches. That volume of water, falling steadily from October through June, tests every joint, flashing transition, and fastener penetration on your roof. We specify synthetic underlayment rated for prolonged moisture exposure on every job — not the old 15-pound felt that saturates and tears in Portland's shoulder seasons.

Moss and Algae Growth

North-facing roof slopes in Portland grow moss within two to three years of installation if left untreated. Moss doesn't just look bad — it holds moisture against the shingle surface, accelerates granule loss, and works its way under shingle edges to break the seal. We include moss remediation in repair scopes where it's present and recommend zinc or copper ridge strips on new installations to inhibit regrowth. If your roof has a visible moss layer thicker than a quarter inch, the shingles underneath are almost certainly compromised.

Freeze-Thaw Cycles and Ice Damming

Portland's winters bring intermittent freezing — low 20s for a few nights, thaw during the day, refreeze. That cycle cracks shingles, lifts flashing, and causes ice dams at eaves where attic heat loss melts snow that refreezes at the cold roof edge. Homes with inadequate attic insulation are the most vulnerable. Ice and water shield membrane at the eaves is standard in our scopes for this reason.

Wind Exposure

Properties in East Portland, Troutdale, Wood Village, and the Gorge-adjacent corridor deal with sustained easterly winds that standard shingle ratings don't fully account for. We specify high-wind fastening patterns and 130-mph-rated shingles in exposed locations, and pay close attention to ridge cap and edge metal details — the first things to fail in a windstorm. If your roof lost ridge caps in the last ice storm, the fastening pattern was wrong.

Ventilation in Pacific Northwest Humidity

Portland's ambient humidity stays elevated even in summer. A poorly ventilated attic traps moisture against the roof deck underside, leading to condensation, mold, and decking rot invisible from outside until the damage is severe. Every roof scope we write includes a ventilation assessment — ridge vent capacity, soffit intake, and whether existing baffles are creating airflow or blocking insulation. Ventilation and insulation work together as a system; fixing one without the other leads to callbacks.

Roofing Materials for Portland Homes and Commercial Buildings

Composition and Architectural Shingles

Asphalt composition shingles are the most common residential roofing material in Portland — cost-effective, widely available, and carrying manufacturer warranties of 25 to 50 years. Standard three-tab composition shingles work for budget-conscious projects, but we install architectural (dimensional) shingles on the majority of our jobs. Architectural shingles are thicker, more wind-resistant, shed water more effectively, carry better warranty terms, and look substantially better on the house. For Portland specifically, we recommend algae-resistant shingle lines with copper granules to inhibit moss and algae growth. The cost premium is marginal — roughly $200 to $400 on a typical residential roof — and it extends functional shingle life by years in our climate.

Metal Roofing

Standing seam metal roofing is gaining traction in Portland for both aesthetic and performance reasons. Metal sheds water and debris faster than shingle, resists moss growth entirely, handles wind better than any asphalt product, and lasts 40 to 70 years with minimal maintenance. The tradeoff is cost — metal roofing typically runs 2x to 3x the installed cost of architectural shingle. We install standing seam panels in steel and aluminum, and we've done corrugated metal on agricultural buildings, exterior renovations, and modern-style residential projects where the look fits.

Flat and Low-Slope Roofing (TPO, EPDM, Modified Bitumen)

Flat roofs and low-slope sections — common on Portland commercial buildings, mid-century modern homes, and additions — require membrane systems rather than shingles. TPO (thermoplastic polyolefin) is our most-specified commercial membrane: heat-welded seams for watertight integrity, UV-reflective surface, and a 20- to 30-year warranty. EPDM rubber membrane is another option for commercial and multi-family applications. Modified bitumen (torch-down) remains common on older Portland buildings and residential flat sections — we install it where it fits but recommend TPO on new installations in most cases for better weld integrity, lower cooling load, and no open flame on your building.

Cedar Shake

Cedar shake still appears on homes in established neighborhoods like Dunthorpe, Lake Oswego, and parts of Southwest Portland where the look is expected or required by covenants. Cedar performs well in wet climates when maintained, but it requires periodic treatment, carries a higher fire risk rating, and costs more than architectural shingle. We install cedar shake where it fits — and we're honest about the maintenance commitment before you sign off.

Roof Repair vs. Roof Replacement: How to Know

Signs You Need a Roof Repair

• A localized leak around a chimney, skylight, vent pipe, or valley — typically a flashing failure, not a shingle failure
• A few missing or cracked shingles from a wind event — repairable if the surrounding shingles are still in good condition
• Moss buildup that hasn't yet damaged the shingle substrate — remediation plus zinc strips can buy years
• A single area of ponding on a flat roof — often fixable with a membrane patch or tapered insulation

Signs You Need a Roof Replacement

• Shingles are curling, cupping, or losing granules across the entire roof field — not just in one area
• The roof is 20+ years old (composition) or 15+ years old (three-tab) and showing widespread wear
• You see daylight through the roof deck from inside the attic
• Multiple leaks in different locations — patching individual spots is just buying time at that point
• The decking feels spongy when walked on, indicating rot beneath the shingles
• Energy bills climbing, attic noticeably hot in summer or cold in winter — the roof system is failing as a unit

If a repair is a temporary fix, we'll say so and scope both the repair and the replacement so you can make a real decision — not a panic decision when the ceiling is dripping.

Ventilation, Insulation, and the Roof System

A roof isn't just the shingles on top — it's a system that includes the deck, underlayment, shingles or membrane, flashing, ventilation, and the insulation beneath it. In Portland's climate, the ventilation and insulation layers are where most "mystery" problems originate. The roof looks fine from outside, but condensation is rotting the deck from inside because the attic isn't breathing.

We assess ventilation on every roof scope: ridge vent linear footage, soffit intake area, and whether existing baffles are creating real airflow. On re-roofs, this is the cheapest time to fix ventilation — the deck is already exposed. Insulation works hand-in-hand with ventilation: proper attic insulation keeps conditioned air inside and prevents the warm-attic/cold-eave condition that causes ice dams. We coordinate insulation and weatherproofing alongside roofing projects so the system works as a whole.

Gutter Integration

Gutters are the last link in the roof's water management chain. We scope gutter condition on every roof job because a new roof draining into failing gutters is a foundation problem waiting to happen. If gutters need replacement, we coordinate it with the roof project — same mobilization, same scaffold, one scope. We tie downspout routing into the drainage plan so water moves away from the foundation. For related exterior work, see our siding and exterior services.

Portland Roofing Permits and BDS Requirements

In the City of Portland, a roofing permit through the Bureau of Development Services (BDS) is required for re-roofing that involves structural changes — adding layers beyond the allowed maximum, replacing roof decking, or altering roof structure. A straight one-for-one residential re-roof falls under a simplified permit process but still must comply with the Oregon Residential Specialty Code for materials, fastening, underlayment, and ventilation.

Commercial projects almost always require a permit, and BDS plan review can add two to four weeks to the schedule. We handle permit applications, plan submissions, and inspection scheduling as part of our scope. Jurisdictions outside Portland — Lake Oswego, West Linn, Tigard, Tualatin, Wilsonville, Sherwood — have their own processes, and we pull permits in all of them regularly.

What Does a New Roof Cost in Portland?

Roofing costs vary by material, roof size, pitch, accessibility, and deck condition. Here are the ranges we see on Portland-area projects:

• Residential composition/architectural shingle: $8,000 to $18,000 for a typical single-family home (1,500 to 2,500 square feet of roof area). Steeper pitches, multiple valleys, and complex roof lines push toward the higher end.
• Residential metal roofing: $18,000 to $35,000+ depending on material (steel vs. aluminum), roof complexity, and panel profile.
• Commercial TPO/EPDM: $8 to $14 per square foot installed. A 5,000 square foot commercial roof typically falls in the $40,000 to $70,000 range.
• Cedar shake: $25,000 to $45,000+ for residential, depending on roof size and complexity.
• Roof repairs: $500 to $3,000 for targeted repairs (flashing, valley, vent pipe). Major repairs involving decking replacement can run $3,000 to $8,000.

Every estimate is line-itemized — materials, labor, permits, disposal — so you see exactly where the money goes. If we find rotted decking or structural issues after tear-off, you get a written change order with cost before we proceed.

Timeline: How Long Does a Roof Replacement Take?

A standard residential shingle re-roof takes two to four days of on-site work once materials are staged. Metal roofing takes three to five days. Commercial projects vary — a 5,000 square foot TPO installation might take a week; a multi-building complex could take several weeks.

The bigger variable in Portland is weather. We schedule roofing in the dry windows (June through October) whenever possible, but emergency repairs get handled year-round. We don't start a tear-off if rain is forecast within the work window — your home won't be left uncovered with a storm coming. If the project spans multiple days, we tarp and seal at the end of each day. Permit timelines add to the schedule: residential permits in Portland typically process in one to two weeks, commercial plan review can take two to four weeks. We submit permits early so they're approved before the crew mobilizes.

Roof Insurance Claims

If your roof was damaged by a storm, a fallen tree, or another covered event, your homeowner's insurance may cover some or all of the replacement cost. We inspect the damage and provide a detailed written scope with line-itemized costs — the same scope we'd write for a cash job. You file the claim; the insurance adjuster inspects. We'll meet the adjuster on-site if requested, because adjusters sometimes miss damage visible only from on-roof inspection. Once the claim is approved, we execute per the agreed scope. If the payout doesn't cover everything, we walk through the gap before work starts.

We don't inflate scopes for insurance jobs and we don't do "free roof" marketing that uses inflated claims to cover your deductible. Our scope is our scope, whether it's going to an insurance company or coming out of your pocket.

Frequently Asked Questions

How do I know if my roof needs repair or full replacement?

If the damage is localized — a leak around a chimney, a few missing shingles, a patch of moss — repair is usually the right call. If you're seeing curling or cupping across the entire roof, widespread granule loss, or multiple leaks in different areas, the roof is done. We give you both options so you can decide based on real numbers, not a sales pitch.

How long does a roof last in Portland?

Architectural shingles: 25 to 35 years. Three-tab composition: 15 to 22 years. Metal: 40 to 70 years. Cedar shake: 20 to 40 years with maintenance. These ranges assume correct installation with adequate ventilation — a shingle rated for 30 years on a poorly ventilated Portland attic will fail in 18 to 20.

Do you offer emergency roof repair?

Yes. Call 844-BOSS-PDX for same-day response on active leaks and storm damage. We'll get a roofing specialist out to assess the damage, tarp the affected area if needed, and give you a written repair scope before any permanent work starts.

Will a new roof increase my home's value?

Consistently, yes. A new roof typically recoups 60 to 70 percent of its cost at resale, and in Portland's market a failing roof is one of the first things a buyer's inspector flags. A new roof removes a major objection from the negotiation table and can make the difference between an offer and a pass.

Do I need a permit to replace my roof in Portland?

In most cases, yes. A straight residential re-roof typically requires a simplified permit through Portland's Bureau of Development Services. Structural work — adding layers, replacing decking, altering roof structure — requires a standard building permit with plan review. Commercial roofing projects almost always require a permit. We handle all permit applications and inspections as part of our scope.

Can you match my existing shingles for a repair?

We can get close, but an exact match on weathered shingles is rarely possible — manufacturers discontinue color runs and existing shingles fade. We source the closest match and focus patches on less visible areas. If the color gap matters because the repair is on a prominent front slope, that's often a signal the roof is old enough to warrant full replacement rather than patchwork.

Ready to get a scope written for your roof? Request your free estimate or call 844-BOSS-PDX and we'll get a roofing specialist out to assess it.