Exterior

Portland's Exterior Remodeling Experts

Your home's exterior does more than make a first impression. In Portland, it's a weather barrier that takes a beating 365 days a year — nine months of rain, freeze-thaw cycles that crack trim and siding, moss colonizing every north-facing surface, and UV exposure that fades paint faster than most homeowners expect. When the exterior envelope fails, water gets in. And in the Pacific Northwest, water damage is the single most expensive problem a homeowner can face.

Boss PDX is a licensed Oregon general contractor (CCB #232383) specializing in exterior home services across the Portland metro. From full siding replacement to targeted rot repair, gutter systems to deck builds, we handle every component of your home's outer shell. We pull our own permits through Portland's Bureau of Development Services (BDS), manage inspections, and build to Oregon Residential Specialty Code — because cutting corners on the exterior is how you end up with a $40,000 moisture remediation project five years down the road.

Siding Replacement and Repair

Siding is your home's primary defense against Portland's climate. Whether you're dealing with failing hardboard, rotting cedar lap, cracked vinyl, or fiber cement that's reached the end of its paint cycle, we handle full replacements and targeted repairs that restore both protection and curb appeal.

Full Siding Replacement

A full siding replacement isn't just about nailing new boards over old sheathing. We strip the existing siding, inspect the sheathing and framing for moisture damage, repair or replace compromised structural members, install a proper weather-resistive barrier (WRB), and then install your chosen siding material with manufacturer-specified fastening patterns and clearances.

For Portland homes, we most commonly install:

• Fiber cement (James Hardie, Allura) — The dominant choice in the Portland market for good reason. Class A fire rating, impervious to rot and insects, holds paint for 15+ years with proper prep. We install HardiePlank lap siding, HardieShingle for accent areas, and HardiePanel for modern/contemporary builds throughout neighborhoods like Alberta, Hawthorne, and the Pearl.
• Engineered wood (LP SmartSide) — Treated with zinc borate to resist fungal decay and termites. A strong option for homeowners who want the look of real wood without cedar's maintenance demands. Popular in Sellwood, Woodstock, and Multnomah Village for matching existing Craftsman and bungalow aesthetics.
• Cedar and natural wood — We still install and repair real cedar siding, especially on historic homes in Irvington, Ladd's Addition, and Laurelhurst where maintaining period-appropriate materials matters. Cedar requires more maintenance in Portland's climate, but properly finished and maintained, it's unmatched for character.
• Vinyl and composite — Cost-effective, zero-maintenance options. Modern vinyl has come a long way from the wavy, faded panels of the 1990s. We install insulated vinyl siding systems that add R-value to your wall assembly.

Every full siding project includes proper flashing at all penetrations (windows, doors, hose bibs, electrical boxes, vents), kick-out flashing where roof-to-wall transitions meet, and integration with your gutter system. These details are where most siding failures originate — not the siding panels themselves.

Learn more about our siding installation and repair services.

Targeted Siding Repair

Not every siding problem requires a full replacement. We handle spot repairs for isolated rot, impact damage, woodpecker holes, and failed caulk joints. If your home has localized damage — say, a section of south-facing siding where paint has failed and moisture has gotten behind the boards — we can surgically repair the affected area, replace damaged sheathing, and blend the repair to match your existing exterior.

The key is catching damage early. If you see bubbling paint, soft spots when you press on siding, or dark staining at seams, call us before the problem spreads to your framing.

Exterior Painting and Finishing

Portland's climate is brutal on exterior paint. The combination of constant moisture, limited UV drying time, and biological growth (moss, algae, mildew) means exterior paint jobs have a shorter lifespan here than in drier climates. A quality exterior paint job in Portland should last 7-10 years on properly prepared surfaces — but only if the prep work is done right.

Our exterior painting process includes:

• Pressure washing and surface prep — We remove all moss, algae, mildew, loose paint, and surface contamination before any primer touches the surface. In Portland, this step is non-negotiable. Painting over biological growth guarantees early failure.
• Scraping, sanding, and priming — All loose and peeling paint is removed to a sound substrate. Bare wood gets a high-quality primer specifically formulated for Pacific Northwest conditions. We use bonding primers on chalky or previously failed surfaces.
• Caulking and sealing — Every joint, seam, and penetration is caulked with high-quality, paintable sealant. Failed caulk is the number one entry point for moisture on Portland homes.
• Two coats of premium exterior paint — We use 100% acrylic latex paints from Sherwin-Williams or Benjamin Moore. These products flex with temperature changes, resist mildew growth, and maintain color longer than budget alternatives.

We also handle staining for cedar siding, decks, and fences. For more on our painting services, visit our painting and wallpapering page.

Window and Door Replacement

Old windows are one of the biggest energy drains on Portland homes. Single-pane wood windows — still common in homes built before 1970 throughout inner Portland neighborhoods like Buckman, Sunnyside, and Richmond — leak air, sweat with condensation, and drive up heating costs from October through April.

We install replacement windows and new-construction windows from major manufacturers including Milgard, Andersen, Marvin, and Pella. Every installation includes:

• Proper flashing integration with your siding and weather-resistive barrier
• Low-expansion foam insulation at the rough opening
• Interior and exterior trim finishing
• Disposal of old windows

For Portland's climate, we recommend double-pane Low-E glass with argon fill as a minimum. The energy savings pay back the investment within 5-8 years, and you'll feel the comfort difference immediately — no more cold drafts by the windows on January mornings.

Entry doors, patio doors, and sliding glass doors are equally important to your home's envelope. A poorly sealed door leaks more air than a window. We install fiberglass, steel, and wood entry doors, French doors, and sliding patio systems with proper threshold drainage and weatherstripping.

See our full window and door replacement services.

Roofing and Roof Repairs

Your roof is the most critical component of your home's exterior. In Portland, a roof doesn't just shed rain — it handles standing moss, debris accumulation from overhanging fir trees, ice damming in the West Hills and higher elevations, and relentless moisture that exploits every flashing failure and worn shingle.

We handle both full roof replacements and targeted repairs:

• Composition shingle roofing — The most common roofing material in the Portland metro. We install architectural (dimensional) shingles from GAF, CertainTeed, and Owens Corning with proper underlayment, ice-and-water shield at eaves and valleys, and ridge ventilation.
• Metal roofing — Standing seam and exposed-fastener metal roofs are gaining popularity in Portland for their longevity (40-60 years), moss resistance, and clean aesthetic. Ideal for low-slope applications where composition shingles struggle.
• Flat and low-slope roofing — TPO, EPDM, and modified bitumen systems for additions, porches, and mid-century modern homes common in areas like Raleigh Hills and Garden Home.
• Roof repairs — Leak diagnosis, flashing repair, damaged shingle replacement, pipe boot replacement, and moss treatment. We find the actual source of the leak, not just the symptom.

Every roofing project we take on includes a thorough inspection of the roof deck, fascia boards, and attic ventilation. A new roof over rotting decking is money wasted. Learn more on our roofing services page.

Trim, Soffit, and Fascia

Trim boards, soffits, and fascia are where Portland homes fail first. These components sit at the intersection of roof, wall, and gutter systems — exactly where water concentrates. Rotting fascia boards behind gutters, deteriorating soffit panels that let moisture into your attic, and crumbling window and door trim are among the most common exterior problems we repair.

We replace damaged trim, soffit, and fascia with materials appropriate to your home:

• PVC/cellular PVC trim — Completely moisture-proof. Will never rot, warp, or need paint (though it accepts paint well if you want a specific color). Our go-to recommendation for fascia boards behind gutters and any trim within splash-zone proximity to grade.
• Fiber cement trim — Matches HardiePlank siding profiles. Dimensionally stable, rot-resistant, takes paint beautifully.
• Cedar trim — For historic homes where maintaining original materials matters. We source clear, vertical-grain cedar and finish it with penetrating oil or high-quality primer and paint.
• Aluminum soffit and fascia — Maintenance-free, available in custom colors, and ideal for homes where long-term zero-maintenance is the priority.

Gutter Systems

In a city that averages 43 inches of rain per year, gutters aren't optional — they're infrastructure. Properly functioning gutters protect your foundation, prevent basement flooding, keep soil erosion away from your footings, and stop water from cascading down your siding and accelerating paint and substrate failure.

We install seamless aluminum gutters in 5-inch and 6-inch profiles, custom-formed on-site to your home's exact measurements. No seams means no leak points. We also install:

• Gutter guards and leaf screens (critical for homes near Douglas fir and big-leaf maple)
• Downspout extensions and underground drain lines tied to Portland's stormwater system
• Rain chains for covered entries and architectural accent
• Half-round gutters for period-appropriate installations on historic homes

If your existing gutters are pulling away from the fascia, overflowing at corners, or draining toward your foundation instead of away from it, those are problems that compound fast in Portland's rainy season. Don't wait until November.

Exterior Waterproofing and Moisture Management

Moisture management isn't a single product — it's a system. In Portland, every exterior project we undertake considers how water moves across, around, and potentially through your home's envelope. This means:

• Foundation waterproofing — Exterior foundation coatings, drain tile systems, and French drains that intercept groundwater before it reaches your basement or crawlspace walls.
• Crawlspace encapsulation — Vapor barriers, sump pumps, and dehumidification systems that control moisture from below. Portland's water table and clay soils make crawlspace moisture a near-universal problem.
• Flashing systems — Kick-out flashing, step flashing, head flashing, and pan flashing at every roof-to-wall transition, window, door, and penetration. Flashing failures are the leading cause of concealed moisture damage in Portland homes.
• Drainage planes — Rainscreen systems and drainage mats behind siding that allow incidental moisture to drain harmlessly rather than being trapped against your sheathing.

Oregon building code requires specific moisture management details for new construction and substantial remodels. When we pull permits through BDS, our plans include all required waterproofing and flashing details — and our field work matches our plans.

Decks, Porches, and Outdoor Living

Portland's outdoor living season runs May through October (and for the hardy, year-round with a covered structure). We build custom decks, repair deteriorating porches, and create outdoor living spaces that extend your home's usable square footage.

Deck Construction

New deck builds require a BDS permit for any deck over 30 inches above grade or attached to the house. We handle the full permit process — structural engineering, plan submission, and all required inspections. Our deck builds use:

• Pressure-treated framing — All structural members are ground-contact or above-ground rated pressure-treated lumber, depending on application.
• Composite decking — Trex, TimberTech, and Fiberon boards that won't rot, splinter, or require annual staining. The upfront cost premium pays for itself in zero maintenance over a 25-year lifespan.
• Cedar and hardwood decking — For homeowners who prefer the look and feel of real wood. We install tight-knot western red cedar and tropical hardwoods like ipe and garapa.
• Proper ledger attachment — Stainless steel ledger bolts, flashing tape, and kick-out flashing at the ledger-to-house connection. Ledger failures are the number one cause of deck collapses, and improper ledger flashing causes house damage. We don't cut corners here.

Explore our deck building services and outdoor living spaces.

Porch Repair and Reconstruction

Portland's older neighborhoods — Alameda, Beaumont, Grant Park, Woodlawn, St. Johns — are full of homes with original covered porches that are 80-100 years old. Rotting porch columns, sagging headers, deteriorated decking, and crumbling concrete steps are common. We repair and rebuild porches to match original architectural details while bringing structural components up to current code.

Fence Installation and Repair

Fences in Portland take the same abuse as the rest of your exterior — constant moisture, moss growth, and the occasional windstorm that turns a weakened fence into a pile of boards. We build and repair residential fences in cedar, composite, vinyl, and metal.

Cedar remains the most popular fencing material in Portland, and for good reason — it's naturally rot-resistant, takes stain well, and ages to a silver-gray patina that fits the Pacific Northwest aesthetic. We install dog-ear, board-on-board, horizontal slat, and custom fence designs with pressure-treated posts set in concrete below the frost line.

For more details, see our fence installation and repair page.

Energy Efficiency and the Building Envelope

Every exterior project is an opportunity to improve your home's energy performance. When we remove siding, we can add rigid foam insulation over your sheathing — a cost-effective upgrade that dramatically reduces thermal bridging through studs. When we replace windows, we're upgrading from single-pane to insulated Low-E glass. When we re-roof, we can improve attic ventilation and insulation.

Oregon's energy code has gotten significantly stricter in recent code cycles. Homes built before 2000 typically have wall insulation in the R-11 to R-13 range. Current code calls for R-21 minimum in walls (R-23 for continuous insulation). While a siding replacement doesn't trigger a full energy code upgrade, adding exterior insulation during a re-side is one of the smartest investments you can make — and it often qualifies for Energy Trust of Oregon incentives.

We also address air sealing during exterior projects. Sealing gaps around windows, doors, penetrations, rim joists, and sill plates can reduce air infiltration by 30-50%, making your home more comfortable and reducing heating costs through Portland's long, cool winters.

Portland Weather: Why Your Exterior Matters More Here

Portland's climate creates a unique set of challenges that homeowners in drier regions simply don't face:

• Moss and biological growth — Moss grows on roofs, siding, fences, and decks. It holds moisture against surfaces, accelerating deterioration. North-facing exposures and areas shaded by trees are especially vulnerable. Regular cleaning and zinc strip installation help, but the underlying materials need to be able to handle persistent moisture.
• Extended wet seasons — Portland averages 155 days of measurable precipitation per year. That's five months of continuous moisture exposure. Materials and installation details that work fine in California or Arizona will fail here.
• Freeze-thaw cycling — While Portland's winters are mild by national standards, we do get freeze-thaw cycles, especially at higher elevations in the West Hills, Council Crest, and Skyline areas. Water that gets into cracks expands when it freezes, widening those cracks and accelerating damage.
• Wind-driven rain — Portland's rain doesn't fall straight down. Prevailing southwest winds during winter storms drive rain horizontally against your south and west-facing walls. This is why flashing details and weather-resistive barriers matter more here than in many other markets.
• UV degradation in summer — Portland's dry summers bring intense UV exposure that breaks down paint, sealants, and roofing materials. The swing from nine months of moisture to three months of UV creates a particularly punishing cycle for exterior finishes.

These conditions mean that material selection, installation details, and maintenance scheduling all need to be calibrated for Portland's specific climate. A contractor who doesn't understand Pacific Northwest building science will cost you money in the long run.

Curb Appeal and Home Value

Exterior improvements consistently deliver the highest return on investment of any home renovation category. According to industry data, siding replacement recoups 70-80% of its cost at resale, and new entry doors return even more. In Portland's competitive housing market — where buyers drive through neighborhoods like Sellwood, Montavilla, and Foster-Powell evaluating homes from the street before ever scheduling a showing — curb appeal directly impacts how fast your home sells and at what price.

But ROI aside, exterior work is fundamentally about protecting the structure you've invested in. A $15,000 siding project today prevents a $60,000 structural repair tomorrow. In Portland's moisture-heavy climate, the exterior isn't cosmetic — it's structural.

Our Process

Every exterior project starts with a thorough on-site assessment. We inspect your siding, trim, windows, roofing, gutters, and foundation for visible and concealed damage. We use moisture meters to check for hidden water intrusion behind siding and around windows. We photograph existing conditions and provide a detailed scope of work with transparent pricing.

For projects requiring permits — which in Portland includes most siding replacements involving structural changes, all window-to-door conversions, new deck construction, and roof structural modifications — we handle the full BDS permit process. We submit plans, schedule inspections, and ensure all work passes inspection the first time.

We carry full general liability insurance, workers' compensation coverage, and maintain an active Oregon CCB license (#232383). We warranty our workmanship and pass through all manufacturer warranties on materials.

Frequently Asked Questions

How often should I repaint my home's exterior in Portland?

In Portland's climate, a quality exterior paint job lasts 7-10 years on properly prepared wood siding and up to 15 years on fiber cement. The south and west-facing sides of your home will degrade faster due to UV and wind-driven rain exposure. Watch for chalking, peeling, cracking, or areas where paint is pulling away from the substrate — these are signs it's time to repaint before moisture damage begins. Homes with significant tree coverage may need attention sooner due to moss and algae growth trapping moisture against painted surfaces.

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

If you're replacing siding with the same material type (like-for-like replacement) and not altering the wall structure, you typically do not need a BDS permit. However, if the project involves removing siding and discovering rot that requires structural framing repairs, adding exterior insulation that changes the wall assembly, or changing window or door openings, permits are required. We assess permit requirements during our initial inspection and handle all BDS submissions and inspections when permits are needed.

What's the best siding material for Portland's climate?

Fiber cement (such as James Hardie) is the most popular and arguably the best all-around choice for Portland. It's impervious to moisture, won't rot, resists insect damage, carries a Class A fire rating, and holds paint significantly longer than wood. Engineered wood (LP SmartSide) is a strong alternative that offers a more natural wood appearance with good moisture resistance. Real cedar remains excellent for historic homes but requires more maintenance. The best choice depends on your home's architectural style, your maintenance tolerance, and your budget — we'll help you weigh the tradeoffs during your estimate.

How do I deal with moss on my roof and siding?

Moss is a fact of life on Portland homes, especially on north-facing surfaces and under tree canopy. For roofs, we recommend annual or biannual treatment with zinc sulfate or professional moss removal. Zinc strips installed along the ridge line provide ongoing prevention as rainwater carries zinc particles down the roof surface. For siding, annual pressure washing at appropriate PSI (too high damages the material) combined with a mildewcide treatment keeps growth in check. The most important thing is to address moss early — once it gets established, it pries into seams and holds moisture against the surface, accelerating deterioration. During any siding or roofing project, we can install preventive measures to reduce future moss growth.

What exterior improvements offer the best return on investment?

In the Portland market, the highest-ROI exterior projects are: entry door replacement (often recoups 90%+ of cost), garage door replacement (similar return), fiber cement siding installation (70-80% recoup), and window replacement (65-75% recoup). Beyond resale value, these improvements also reduce energy costs, lower maintenance expenses, and prevent costly water damage. The best investment is often the one that prevents a larger problem — replacing failing siding before water damages your framing will save far more than the siding costs alone.

How long does a full siding replacement take?

For an average Portland home (1,500-2,500 square feet of siding area), a full siding replacement typically takes 2-4 weeks depending on the extent of underlying repairs needed, the complexity of the home's architecture, and the siding material chosen. Homes with significant rot damage, multiple bump-outs, or intricate trim details take longer. Weather can also impact scheduling — we work through light rain but pause during heavy storms to ensure proper adhesion of house wrap, flashing tapes, and caulking. We'll provide a projected timeline during your estimate.

Can I replace my windows one at a time, or do I need to do them all at once?

You can absolutely replace windows in phases. Many Portland homeowners start with the windows that are in the worst condition or the rooms where they feel drafts most acutely, then replace the rest over the following year or two. The main advantage of doing all windows at once is efficiency — we're already set up, scaffolding is in place, and you get a consistent look and finish across the entire home. We also typically offer better per-unit pricing on whole-house window projects. But phased replacement is a perfectly valid approach, especially when budget is a consideration.

Get Your Exterior Project Started

Whether you need a full siding replacement, targeted rot repair, new windows, a deck build, or a comprehensive exterior renovation, Boss PDX has the experience and the crew to get it done right — and built to handle Portland's climate for decades.

Request your free estimate online or call us at 844-BOSS-PDX. We'll schedule an on-site assessment, provide a detailed scope and transparent pricing, and get your project on the calendar.