Cedar Shake Roof Cleaning

What This Service Involves

Cedar shake roofs are especially vulnerable in Washington, where trapped moisture and heavy moss accelerate rot and cupping. These roofs cannot tolerate high pressure, which gouges the soft wood grain and shortens their lifespan dramatically. We apply targeted low-pressure treatments that kill moss and algae while allowing the cedar to dry and breathe again. Clearing the growth helps the shakes shed water properly and slows the decay that Northwest weather encourages.

Benefits

Halts moss-driven rot that destroys untreated cedar roofs; Preserves the natural grain and thickness of the shakes; Improves water shedding across the roof surface; Prepares the wood for optional sealing or preservative treatment

Our Process

1) Assess shake condition for rot, cupping, and loose pieces; 2) Cover plantings and pre-wet the area below; 3) Apply a wood-safe treatment to kill moss and algae; 4) Rinse at low pressure and clear debris from the courses

What Affects the Cost

Condition and age of the cedar shakes; Severity of moss growth and any rot present; Roof pitch and safe accessibility; Total shake roof square footage; Whether preservative or sealing follow-up is desired

Best Time of Year

Clean cedar roofs in mid to late summer so the wood can dry fully before autumn moisture returns.