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Roof Moss Removal Vancouver, WA

There is no such thing as a “maintenance-free” roof! It is extremely important to maintain all types of roof to ensure increased longevity. If you have lived in the Portland area for any amount of time, you have probably noticed that we get a lot of rain and are very familiar with cloudy days. This is exactly what moss and fungi needs to take over your roof. Not only does this look unappealing, it also raises the potential for water to find its way into your home. With several options for moss removal, we are sure that you will be satisfied with the new look of your roof after we have cleaned it and have the peace of mind that water will stay outside your home. 

How does moss affect your roof? Moss grows into your shingles, wearing away and loosening the material. In addition, the moss can lift the shingles, damaging the integrity of them and allowing water to leak underneath and into your home. Moss also holds in moisture, which in a wet climate like the Pacific Northwest, means a mossy roof is a perpetually wet roof. This dampness can lead to bacteria and mold growth which can lead to even more thin spots, holes, and leaks in your roof.

mossMoss Removal Procedures

With several options for moss removal, we are sure that you will be satisfied with the new look of your roof after we have cleaned it and have the peace of mind that water will stay outside your home.

How we rid your roof of moss –

On all roof types, we offer a gentle combination of compressed air and a soft brushing. With this method our technicians will hand brush the moss that has made it’s home on your roof, gently removing it from the shingles. They will then use air to blow this loosened moss and debris off of your roof and out from between the shingles/tiles/shakes. This is a gentle method that does not cause damage to the shingles, helping prolong the integrity of your roof.

On cement tile and cedar shake roofs, we may need to use high pressure water to clean the roof of moss, mildew, lichen, and algae. As this can accelerate the deterioration of the roofing materials, we reserve this option only for the most extreme cases, or as required by HOA regulations.
With our follow-up preventative treatment, your Portland area roof is no longer a hospitable climate for moss to grow in.


Preventative Treatments

We use tried and true preventative treatments to keep the moss away from your roof, even in our Pacific Northwest weather. When we apply our moss prevention treatments, we cover the entire roof, ensuring that moss has nowhere to grow.

For tile and composition roofs we use a water based zinc treatment that kills the moss but is gentle on your roof. This treatment can take up to a few weeks to fully kill the moss, and in that time you should see any green moss slowly turn yellow/brown and eventually black. It is not uncommon for a white residue to be seen on the roof in the few days following application of this treatment. This residue, caused by a high concentration of zinc in the solution, is completely harmless to your roof, and will rinse away with the next heavy rain.

Speaking of rain, this treatment can be applied even in a light drizzle, making it an optimal treatment for the Pacific Northwest. If you are concerned about the weather on the day the treatment is applied, we follow this general rule: the treatment can be applied unless it is raining hard enough for water to be running down the roof. In addition to this we generally provide a warranty on our treatments so in the case that the first application isn’t effective, we will come back out in the warranty period at no cost to you!


Our cedar shake treatment is more than just a moss prevention treatment:

Our copper based treatment includes a pesticide to ward off those pesky insects that can damage your roof and cost you thousands of dollars in unnecessary repairs. Termites and Powder post beetles will stay away, leaving your roof alone for years.

In addition to insect damage, our treatment reduces warping, splitting, and other deterioration caused by moisture fluctuation, as well as controlling destructive fungi and rot-causing organisms.