Moss Treatment in Portland, Oregon

Moss Treatment

Moss Prevention Treatment in the Portland Area

Moss Prevention Treatment Techniques in Portland, OR

Moss will eat your roof. If you want to maximize the life of your roof, you are in the right place. Keeping moss off your roof is key, and that’s what we do as Commercial Pesticide Operators licensed by the Oregon Department of Agriculture (required by law for anyone applying moss treatment to your roof).

Green is good—except on your roof! Actually, if you can see green on your roof, it’s past time to treat for moss. The best course of action is to apply preventative treatment before any moss grows. Moss significantly reduces the expected life of your roof—it can cut the useful life of a roof in half. Why is moss so insidious? It travels in airborne spores and makes itself at home on your roof where it eats away and deteriorates your shingles. On composition roofs, moss removes the protective gravel layer that inhibits UV damage, breaks the seal between shingles allowing water to blow up under shingles, and warps shingles exposing them to wind damage. When moss and organic debris (leaves, needles, twigs, etc.) build-up, they hold water on your roof, leading to rot, mold, and leaks.

We offer a 100% Satisfaction Guarantee

At Action Northwest we believe in doing a great job, every time. That’s why we stand behind our 100% Satisfaction Guarantee. That’s right, if you’re not happy, we’ll make it right free of charge. No worries. No hassles.

(503) 407-3346
or

When to Treat for Moss

The Best Time To Kill Moss Is As Soon As You See It On Your Roof.

How often should you treat for moss? If you have moss removed from your roof, you should have moss treatment applied. For preventative maintenance, how often you treat your roof depends on the architecture and the environment. At minimum treatment should be done every three years, and more often if you start to see moss growth between treatments.

If your roof gets plenty of light and air and has a fairly flat, regular pitch, you should plan to treat every three years. If your roof is steep or has a complicated roofline (which creates shaded areas on the roof) you will probably need to treat at least every other year, whether or not you have a lot of trees. If your roof is shaded by trees, or you have a north-facing roof surface, you will likely need treatment every one to two years depending on the density of your tree coverage. If your roof is surrounded by trees, especially on the south, east, or west sides of your home, you may well need to treat every year.

More and more insurance companies are refusing to renew homeowners insurance unless the roof is free from moss. They are realizing the increasing claims that they are paying due to prematurely failing roofs. Since we are ODA licensed applicators, we can also provide you with a certificate for your insurance company to show what was done on your roof, how much and when the moss killer was applied.

Professional, Licensed Moss Treatment

Safe, effective moss prevention keeps your roof in great shape.

Portland, Oregon Moss Prevention Treatment

As one of the few ODA-licensed applicators of moss treatment in the Portland area, we are here to help you protect your roof. Moss treatment is regulated by the Oregon Department of Agriculture. The ODA requires that anyone you have applying any type of pesticide or herbicide to your roof either have or be directly supervised by a person holding a Commercial Pesticide Applicators License. This is not optional. As licensed professionals, we take care of your home and the environment by properly applying the right amount of only EPA-labeled moss killer.

All of our moss treatment products have the legally required EPA labels. The product we use depends on your roof, and the weather conditions at the time of application. If you would like, we can use our organic moss treatment for your home.

Read more about the destructive power of moss: Don’t Let Moss on Your Roof Cause Another Ice Age!

It’s easy to get a free estimate for an EPA-approved moss treatment for your roof. Just call us at (503) 407-3346 or click the button.

Portland, Oregon Moss Prevention Treatment

Request A Free Estimate

Select The Services You'd Like Estimated
(check all that apply)

Contact Info




Gutter or Downspout Installation
Gutter or Downspout Repair
Gutter & Downspout Cleaning

Windows Interior & Exterior
Windows Exterior Only
Window Track Detailing
Skylight Cleaning
Solar Panel Cleaning




Moss Remove & Treat w/ Gutter Clean Package
Moss Removal & Treatment
Moss Treatment Only
Roof Wash (Gentle Wash or Green Clean)
Algae Wash

Dryer Vent Cleaning
Roof Repair

Exterior Gutters
Driveway Cleaning
Concrete / Brick Walkway or Patio
House Wash (Gentle Wash Siding)
Wood / Vinyl Deck or Fence (Gentle Wash)
Type the characters you see in this image.