Soft Washing in Seattle & the Puget Sound
PNW roofs take a beating from constant moisture, shade, and organic growth. Moss and algae hold water against your shingles, which speeds up rot and shortens the life of the roof. Our soft wash system uses a low-pressure approach with cleaning solutions that lift moss, algae, and black streaks without tearing up the granules on your shingles. It cleans the roof you have and slows down how fast the growth comes back.
How It Works
Free inspection so we can see how bad the moss and staining actually are
We protect landscaping and gutters before we start
Low-pressure soft wash application across the full roof surface
Treatment that kills moss at the root to slow regrowth
Final walkthrough and honest recommendations on next steps
What's Included
Common Problems We See
Green moss patches holding moisture against the shingles
Black algae streaks making a roof look aged before its time
Shaded or damp sections of the roof where growth keeps coming back
Early shingle wear caused by organic buildup that was never addressed
Frequently Asked Questions
What's the difference between soft washing and pressure washing?
Pressure washing blasts your shingles with high-pressure water, which strips protective granules and shortens the life of the roof. Soft washing uses low pressure plus a cleaning solution that actually kills the moss and algae at the root. It's the only method most shingle manufacturers will let you use without voiding the warranty.
How much does roof soft washing cost in Seattle?
Most single-family roofs run $450 to $1,200. Price depends on square footage, pitch, and how bad the moss situation is. Heavy moss covering a shaded north slope takes more product and labor than a light surface clean.
How often should I have my roof cleaned in the PNW?
Every 2 to 4 years for most homes. If you've got a lot of tree cover or a steep north-facing slope, closer to every 2 years. Homes in sunnier spots with less shade can sometimes stretch to 5. Our maintenance program folds this in on a regular schedule.
Will moss really damage my roof?
Yes, and it's the biggest roof killer in the Seattle area. Moss holds moisture against your shingles, lifts them as it grows under the edges, and speeds up granule loss. A clean roof that gets treated every few years will often outlast one that doesn't, by 5 to 10 years.
Is soft washing safe for plants and pets?
We protect your landscaping, rinse anywhere the solution runs off, and use products that break down fast. Pets and kids should stay inside during the treatment and for an hour after. Once the roof dries, there's no residual issue.
Can you soft wash a cedar shake roof?
Yes. Cedar shakes actually benefit from soft washing more than shingles do because moss digs into the grain and holds water against the wood. We use a gentler solution on cedar and back off the pressure even further. It extends the life of the shake significantly.
Need soft washing work?
Free estimates, no obligation. We'll take a look and give you a straight answer.
Get a Free Estimate