Pressure washing service in Kirkland, WA

Kirkland waterfront and view homes typically benefit from window cleaning twice per year — once in spring after the wet season to remove mineral deposits and algae film, and once in fall before the rainy season begins. Homes along the Moss Bay and Houghton waterfront corridor accumulate hard water deposits and organic streaking that reduce visibility of Lake Washington views, and the wet season adds algae film to exterior glass that builds up quickly on surfaces that face the water.

Finn Hill and Juanita are among Kirkland's most heavily wooded neighborhoods, and the mature tree canopy in both areas reduces direct sunlight on roof slopes for most of the year. Kirkland receives around 41 inches of rain annually with moisture present from October through May, and shaded roofs in these neighborhoods stay damp long enough between rain events for moss to spread rapidly. Homes built in the 1970s and 1980s — which make up a large share of Finn Hill's housing stock — are at the age where original algae-resistant granules have worn down.

High-pressure washing can damage older wood siding by forcing water behind panels, splitting wood grain, and stripping paint — all of which are common failure modes on the mid-century and 1970s homes found throughout North Kirkland. Soft washing with low pressure and biodegradable cleaning solutions is the correct approach for wood and older vinyl siding, killing algae and moss at the root without damaging the surface or voiding any remaining manufacturer warranties.

Both — cleaning gutters in early fall before the main wet season removes summer debris and ensures downspouts are clear when heavy rain begins, and a spring cleaning after the wet season clears the organic material that accumulates through winter. Kirkland's wooded neighborhoods generate heavy debris loads from conifers and deciduous trees, and clogged gutters during the wet season can overflow and cause water to back up against fascia boards and siding.