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Exterior cleaning, explained

How often to wash, what method your surfaces need, and how to keep Pacific Northwest moss from winning.

Ethan Olson soft washing a roof from a ladder on a mild Washington day
Featured Maintenance·

When Is the Best Time to Clean Your Roof in Washington State?

The best time to clean your roof in Washington State is late spring or early fall — mild, dry-ish weather for the treatment to work. Why winter and peak summer are worse windows.

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Before and after roof cleaning near the Mountain Loop — pine needles and moss removed by soft washing
Roof Care·

Can Rain Wash Moss Off Your Roof? (The Honest Answer)

Can rain wash moss off your roof? No — rain feeds moss, it doesn't remove it. Here's the myth vs. reality, why moisture makes it worse, and what actually clears a roof.

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Olson Pro Wash technician hanging warm-white C9 Christmas lights along a Lake Stevens roofline in falling snow
Christmas Lights·

Christmas Light Installation in Lake Stevens, WA — What It Costs and How to Book Early

Christmas light installation in Lake Stevens, WA — commercial-grade custom-cut lights, install, in-season service, takedown and storage. Pricing from $399 and why to book early.

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Asphalt shingle roof with heavy moss and lichen growth before cleaning
Roof Care·

Does Moss Actually Damage Your Roof? What Washington Homeowners Need to Know

Does moss damage your roof? Yes — here's how it lifts shingles, holds moisture and rots decking, the real cost of ignoring it, and how to tell moss from algae and lichen.

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Olson Pro Wash clearing leaves and needle debris from a home gutter in Snohomish County
Maintenance·

Fall Gutter Cleaning Checklist for Snohomish County Homeowners

A fall gutter cleaning checklist for Snohomish County — why it matters before the rains, a DIY step-by-step, what clogged gutters cause, and when to call a pro.

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Olson Pro Wash soft washing the siding of a home in Arlington, WA
Local·

House Washing in Arlington, WA — Soft Wash Exterior Cleaning

House washing in Arlington, WA — a low-pressure soft wash for siding, soffits, fascia and trim. What's included, 2026 pricing from $199, before/after, and how to book.

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Before and after roof soft wash on a low-slope valley — heavy needle buildup rinsed clean
Maintenance·

How Long Does Roof Cleaning Last? (And How to Make Results Last Longer)

How long does roof cleaning last? Usually 2–3 years in the Pacific Northwest. What shortens results, what extends them, and the maintenance habits that keep a roof clear.

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Ethan Olson on a ladder checking a roofline for moss in the Pacific Northwest
Maintenance·

How Often Should You Clean Your Roof in the Pacific Northwest?

How often to clean your roof in the Pacific Northwest — most western Washington homes need it every 2–3 years. The factors that change that, and the signs it's overdue now.

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Ethan Olson soft washing moss off a shingle roof from a ladder in Washington State
Pricing·

How Much Does Moss Removal Cost in Washington State?

What moss removal costs in Washington State in 2026 — roof and surface price ranges, why our climate grows so much of it, how treatment works, and how long results last.

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Olson Pro Wash service truck parked at a home on house washing day
How-To·

How to Prepare Your Home for Pressure Washing (Homeowner Checklist)

A simple homeowner checklist to prep for pressure washing or a house wash day — windows, plants, outlets, pets, vehicles — plus what the crew handles and what not to do.

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Olson Pro Wash running a surface cleaner on a concrete driveway in Snohomish County
Pricing·

How Much Does Pressure Washing Cost in Snohomish County? (2026 Pricing)

2026 pressure washing cost in Snohomish County by surface — driveways from $99, house washing from $199, decks, patios and fences — plus what affects price and DIY vs pro.

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Olson Pro Wash cleaning a concrete driveway with a surface cleaner in Everett, WA
Local·

Pressure Washing in Everett, WA — Driveways, Siding & Decks

Pressure washing in Everett, WA — driveways from $99, soft-wash house washing from $199, decks and patios. Local service, 2026 pricing, and easy booking.

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Olson Pro Wash technician soft washing a moss-covered roof in Lake Stevens, WA
Pricing·

How Much Does Roof Cleaning Cost in Lake Stevens, WA? (2026 Guide)

Real 2026 roof cleaning cost in Lake Stevens, WA — price ranges by home size, what drives the number, what our soft wash includes, and how to spot a risky quote.

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Before and after roof soft washing on a Lake Stevens home — moss and streaking cleared to clean shingles
Local·

Roof Cleaning in Lake Stevens, WA — What to Expect and How to Choose a Company

Roof cleaning in Lake Stevens, WA — local roof problems, what a proper soft wash looks like, red flags to avoid, our process, and honest before/after results.

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Olson Pro Wash technician soft washing a moss-covered roof in Marysville, WA
Local·

Roof Cleaning in Marysville, WA — Moss Removal & Soft Wash Service

Roof cleaning in Marysville, WA — local moss and algae problems, our low-pressure soft wash process, 2026 pricing, and how to book. Licensed, insured, 4.9-star rated.

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Asphalt shingle roof after a low-pressure soft wash, clean with no granule loss
How-To·

Soft Wash vs Pressure Wash: Which Is Right for Your Roof?

Soft wash vs pressure wash for your roof — why high pressure strips shingle granules, why soft washing is manufacturer-recommended, and when each method actually belongs.

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Ethan Olson checking a home's roofline and gutters at the start of spring in Washington
Maintenance·

Spring Exterior Cleaning Checklist for Washington State Homeowners

A spring exterior cleaning checklist for Washington homeowners — roof, gutters, siding, driveway, windows, deck and landscaping. What to DIY, what to hire out, and why spring.

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Before and after combined roof and gutter cleaning on a forested Washington home with packed needle debris
Roof Care·

What Happens If You Don't Clean Your Roof? (Real Consequences for WA Homeowners)

What happens if you don't clean your roof in Washington — the damage timeline, why a $299 cleaning beats a $15,000 replacement, and the insurance and home-value fallout.

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Olson Pro Wash soft washing the siding of a two-story home, suds running down the wall
How-To·

What Is Soft Washing? How It Works and Why It's Better for Your Home

What is soft washing? A low-pressure, detergent-based cleaning method for roofs, siding and painted surfaces — how the chemistry works, what it's safe for, and how it compares.

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Olson Pro Wash technician on a ladder hanging warm-white C9 Christmas lights along a roofline as snow falls at dusk
Christmas Lights·

Custom-Cut Christmas Lights vs. Store-Bought Strings: Why the Difference Shows

Why professionally installed, custom-cut Christmas lights look sharp from the curb while big-box strings bunch, gap and half-fail by New Year's — and how the full-service model works.

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Two-story Western Washington home being soft washed on a clear day
Seasonal·

The Best Time of Year to Pressure Wash Your House in Western Washington

Late spring through early fall is the sweet spot for exterior cleaning in Western Washington — plus which jobs can be done year-round and how to time each one.

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Olson Pro Wash technician on a ladder soft-washing tiger-stripe staining off an exterior gutter face
Gutter Care·

Tiger Stripes on Your Gutters: What They Are and How to Get Them Off

Those black vertical streaks on your gutter faces aren't dirt — they're bonded oxidation a hose won't touch. Here's what causes tiger striping and how gutter brightening actually removes it.

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Raptor stainless steel micro-mesh gutter guard being fitted to a shingle roof in Snohomish County
Gutter Guards·

Why We Install Raptor Stainless Steel Gutter Guards in the Pacific Northwest

Fir needles, roof grit and nine months of rain break most gutter guards. Here is why Olson Pro Wash installs Raptor Type 304 stainless micro-mesh — and how it holds up here.

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Olson Pro Wash technician soft-washing a moss-covered roof in Snohomish County
Pricing·

How Much Does Roof Cleaning Cost in Snohomish County? (2026 Prices)

Real 2026 price ranges for roof soft washing in Snohomish County, WA — what drives the number, what a fair quote includes, and how to avoid paying for roof damage.

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Olson Pro Wash soft-washing a mossy roof from a ladder
Explainer·

Soft Wash vs Pressure Wash: What's Right for Your Washington Home?

The difference between soft washing and pressure washing, which surfaces need which method, and why the wrong one can cost you thousands in siding and roof damage in the wet PNW.

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Ethan Olson on a ladder checking a roofline for moss
Maintenance·

How Often Should You Pressure Wash Your Home in the Pacific Northwest?

A realistic cleaning schedule for houses, roofs, decks and driveways in the wet Puget Sound climate — plus the warning signs that mean you're already overdue.

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Olson Pro Wash technician soft-washing a roof in Snohomish County, WA
Buying Guide·

Best Pressure Washing Services in Lake Stevens, WA (2026 Guide)

How to choose a pressure washing and roof cleaning company in Lake Stevens and Snohomish County — the seven things that separate a premium crew from a cheap one, plus real 2026 price ranges.

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