Exterior Cleaning Services in Bull Mountain, OR

Bull Mountain sits at elevations between 300 and 700 feet in unincorporated Washington County, tucked between Tigard and Sherwood. The higher you go on Bull Mountain, the more exposed homes are to the prevailing westerly winds and rain — which means roofs, siding, and exposed decks take on more moisture and accumulate moss faster than properties at lower elevations in the valley.

Most Bull Mountain homes were built in the 1990s through 2010s and feature vinyl siding or hardie board exteriors with asphalt architectural shingles. These materials are durable, but they're not immune to moss. Vinyl siding develops green algae streaks along seams and in shaded areas, while hardie board and painted trim collect mildew along the bottom courses where moisture lingers. Architectural shingles are particularly vulnerable to moss root penetration, which causes granule loss and shortens the roof's service life if left untreated.

Our soft wash treatment for roofs and siding kills moss and algae at the root with eco-friendly biodegradable solution and rinses cleanly at low pressure. Decks and driveways get appropriate high-pressure treatment with surface cleaning equipment that prevents streaking. We work throughout Bull Mountain year-round and offer free on-site quotes — no obligation.