Serving the Seattle Eastside
Deck & Fence Washing
Deck & Fence Washing for Eastside homes — wood-safe chemistry, no fiber damage. Licensed, Bonded, and Insured.
A Pacific Northwest deck that hasn't been cleaned in two or three years is telling a story in its surface: gray wood where there used to be cedar warmth, green patches on the shaded corners, slick spots near the edge that are a slip hazard when wet. The structure is usually fine. What's failing is the surface — and surface cleaning is what we do. Most of the decks we restore were already earmarked for replacement until the homeowner saw them after a proper wash.
Why Eastside Homeowners Choose PNW Softwash for Deck & Fence Washing
We never use high-pressure washing on wood decks. High pressure raises the wood grain, creates furring and splinter conditions, and drives water deep into the boards in ways that promote rot. Our soft wash process uses low-pressure delivery with a deck-safe surfactant solution that lifts algae, mold, mildew, and weathered surface oxidation without damaging the wood fiber.
For composite and Trex decking, we follow the manufacturer's recommended cleaning protocols exactly — the wrong chemistry or pressure on composite can void the product warranty. We've cleaned enough Eastside composite decks to know what works and what damages the surface finish.
The Difference Is Visible
Real results from homes across the Eastside.
Deck Restoration — Beaver Lake
Fence Cleaning — Kent
Deck Wash — Tiger Mountain
Drag the handle to reveal the transformation. Real homes, real results.
What Our Deck & Fence Washing Service Includes
Deck washing includes the full deck surface, railings (all faces), balusters, and the stair stringers and treads. We clean under railing caps and along the ledger board. Fence washing covers both faces of the fence, posts, and rails.
We can add a brightener application after washing — wood brighteners restore the natural tannins and open the grain for better stain or sealer absorption. If you're planning to restain or reseal your deck, cleaning + brightening is the correct prep sequence. We don't apply stains or sealers ourselves — we focus on the cleaning and prep side.
Pricing for a standard 400 sq ft deck starts at $500–$700. Fence washing is priced per square foot. Combined deck + fence packages receive a bundled rate.
What Homeowners Say
★★★★★
“Reasonable price Brendan communicated very well as to schedule and work to be done. He seems young but really knows his stuff and is very capable. Our house looks amazing now. So clean! They work hard and are very conscientious and careful. I would hire them again and highly recommend them.”
— Beth C
Deck & Fence Washing — Every City We Serve
Select your city for local pricing, neighborhood-specific details, and free same-day quotes.
Deck & Fence Washing — Frequently Asked Questions
Honest answers from a Licensed, Bonded, and Insured crew that works on the Eastside every week.
What does deck and fence cleaning cost?
- Deck and fence soft washing runs $500–$1,500 depending on square footage, wood species, and whether you want stain-prep brightening. Most single decks fall in the $500–$800 range; large deck-and-fence combinations reach $1,500. Bundle it with house washing and save 10%. Free assessment, clear quote, no surprises.
Can pressure washing damage my deck boards?
- High-pressure washing absolutely can damage wood — it tears apart fibers, creates splinters, and opens the grain to moisture damage. That's why we use low-pressure soft washing with sodium metasilicate instead of blasting your deck with thousands of PSI. The chemical does the work, not the pressure. Your wood stays intact, your grain stays smooth, and your deck is actually stronger after cleaning because we've removed the organisms that were weakening it.
What is the best way to prepare my deck for restaining?
- Professional cleaning with sodium metasilicate followed by an oxalic acid brightening treatment is the gold standard for stain prep. Sodium metasilicate penetrates deep into wood pores to lift embedded dirt and old stain residue without damaging the wood. The oxalic acid brightener then restores natural color and neutralizes pH for optimal stain adhesion. This two-step approach is why professionally prepped decks hold stain 3–5 times longer than a pressure-washed deck.
Why do you use sodium metasilicate instead of bleach on wood?
- Sodium metasilicate is specifically recommended for wood cleaning because it's effective at breaking down grease, oils, and organic growth without negatively affecting the wood's structural integrity. Unlike bleach (sodium hypochlorite), which has a pH around 12 and can break down lignin — the natural polymer that provides structural support — sodium metasilicate cleans without bleaching or weakening wood fibers.
Can you clean my deck without damaging the existing stain or finish?
- Our sodium metasilicate cleaning solution is designed to clean wood surfaces without stripping existing finishes. Followed by an acidic brightener (like oxalic acid) to neutralize the pH and restore wood color. However, if your goal is to restain or reseal, we can provide a deeper cleaning that prepares the wood for a new finish. We assess your deck's condition and discuss your goals before choosing the approach.
Ready to Book Deck & Fence Washing?
Free same-day quotes. Serving the entire Seattle Eastside.