House Washing

House washing is a full soft wash of your home's exterior — siding, trim, eaves, fascia, and any painted or stained surfaces. We apply biodegradable cleaner at low pressure, let it dwell to break down the algae and mildew, then rinse it clean. The black streaks on your siding are algae; the green film is moss and mildew. Both hold moisture against the siding and accelerate rot.

the area's climate is perfect for algae growth. Most homes across King County need washing every 1-2 years to stay ahead of it. If you're selling, house washing is one of the fastest ways to boost curb appeal — it makes the home look 10 years newer. If you're staying, it protects your siding investment and prevents moisture damage that leads to expensive repairs.

“The black streaks on your siding are algae; the green film is moss and mildew — both hold moisture against the siding and accelerate rot.”

We adjust our approach based on siding type. Vinyl and fiber cement handle standard soft wash. Wood siding — especially older cedar — needs gentler pressure and a shorter dwell time to avoid raising the grain. Painted surfaces get tested in an inconspicuous spot first to make sure the cleaner won't lift the paint. We've washed hundreds of homes in the area and know what each siding type can handle.

Typical service takes 3-5 hours for a standard two-story home. Larger homes or properties with a lot of detail work — decorative trim, multiple gables — can run longer. We protect landscaping with tarps and rinse plants before and after to dilute any cleaner that drifts. For commercial properties — apartment buildings, office complexes, retail centers — we schedule around your tenants and can work after hours or on weekends.

We also clean eaves and fascia while we're washing the house. These areas collect cobwebs, wasp nests, and dirt that regular rain doesn't reach. A full house wash includes everything from the foundation to the roofline — not just the siding.