House Washing & Siding Cleaning

Algae and mildew grow on all siding types in Western Washington due to constant moisture and mild temperatures. Green and black streaks aren't just cosmetic — algae holds moisture against siding and accelerates paint failure and wood rot. AWP Exterior Cleaning soft-washes siding using the same low-pressure technique used on roofs. High-pressure washing forces water behind siding, damages caulk seals, strips paint, and splinters wood.

Soft washing applies cleaning solution at garden-hose pressure, allows 10–15 minutes of dwell time for the solution to break down growth, then rinses at controlled pressure. The process removes years of buildup in one pass. The crew pre-wets landscaping, covers electrical fixtures, and rinses plants immediately after to prevent any solution contact. The cleaning solution is biodegradable and breaks down within 24 hours.

“High-pressure washing forces water behind siding, damages caulk seals, strips paint, and splinters wood.”

Most single-family homes across Greater Clark County take 2–3 hours to wash depending on square footage and the number of stories. Two-story homes require extension poles and take longer than single-story ranches. AWP cleans windows, eaves, and fascia as part of the house wash — those surfaces collect the same organic growth as siding.

In the region's climate, annual house washing is recommended. Homes on the north side of streets or under tree cover may benefit from more frequent cleaning. The crew provides before-and-after photos for every job, and you don't need to be home as long as they have exterior access. Payment is due on completion unless invoicing has been arranged.