Mercer Island Roof Cleaning & Roof Moss Removal

extend the life of your roof

Roof Cleaning &
Roof Moss Removal
Mercer Island, WA

  • Prevent Roof Damage
  • Remove Debris, Moss, Algae
  • Safety Conscious, Local Mercer Island Technicians

Our trained experts clean roofs and gutters in Mercer Island efficiently by using top-of-the-line equipment and state-of-the-art fall protection when removing moss and cleaning your roof. We are always careful of landscaping and protect the integrity of your roof and gutters.

When addressing moss on your roof, our primary goal is to preserve the integrity of your roof by removing the clumpy moss and applying a moss control product to kill any remaining moss. We begin by agitating any large clumps of moss with a stiff brush. Then we blow all the loose debris off the roof with a commercial-grade backpack blower. We clear all the debris from the inside of the gutters and ensure that all the downspouts are clear. We then apply a moss control product to kill any remaining moss and do a thorough clean-up of the surrounding grounds.

Our technicians are trained and certified to apply moss control products. On most roofs, we use a granular, broad-spectrum, peroxide-based algaecide/fungicide called GreenClean Pro. On some roofs we use a liquid moss treatment called Spray & Forget, a biodegradable, non-corrosive, citrus-based cleaner that kills moss and algae. These are the best products we’ve found that are both environmentally responsible and very effective. Neither product contains bleach, lye, acid, phosphates or heavy metals.

Call us at (425) 821-3814 for a phone estimate and schedule a roof cleaning and moss removal and treatment for your home in the Mercer Island area. Our technician will show up on time and complete the work leaving your roof free of moss, and your gutters and downspouts running clear.

Call for a free Estimate

Frequently Asked Questions

AA Window and Gutter Cleaning offers affordable roof cleaning services to remove moss and debris from roofs.

We use a stiff brush on the larger clumps of moss and clear the roof of debris. On most roofs, we use a peroxide-based algaecide/fungicide to treat the moss on your roof. We do not use zinc sulfate which is known to harm fish. Call (425) 821-3814 for a free estimate for your home in Mercer Island!

We blow the loose debris from the roof with commercial grade backpack blowers. We use a stiff brush to gently agitate the larger clumps of moss, and then use the blower again. Next, we clear all the debris from the gutters and downspouts, treat the roof, and do a thorough clean-up.

We treat roofs with an environmentally responsible product to kill any remaining moss. It takes about one month for the moss to change color and die. We guarantee that all the moss will die or we will come back and apply another treatment. This process is widely accepted by our customers. 

No, we advise our clients against pressure washing roofs. Pressure washing often damages roofs and reduces the life of the roof because it washes off a layer of the roof. We have pressure washers and use them for cleaning concrete and rinsing decks. We don’t pressure wash roofs. Call (425) 821-3814 for a free estimate!

It was great to meet Steven. He did a really good job. I’m glad to have you keeping up with my roof cleaning.

Ed K
Mercer Island

The roof cleaning was fantastic. The roof looks great. He came and did the service and cleaned up, and I didn’t have to take off work to be home for the service.

Daphne
Mercer Island

Justin did alot of work and from what we can tell thus far the roof and gutter cleaning looks to have been done well. Justin was very polite, professional, and personable.

Todd S
Mercer Island

I was blown away. I came home and I noticed that the moss treatment was evenly distributed on the roof. When we drove up they were washing the car! We are customers for life!!!

Jeff P
Mercer Island

Trusted by clients on

Since 1985