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901 SE Mount Hood Hwy, Gresham, OR 97080
(503) 492-7663

How to Deal with Moss on the Roof

Have you ever looked up at your roof and thought, “Wow, those shingles are looking a little green, aren’t they?” If this sounds familiar, you probably have moss on your roof, a common yet pesky problem for many homeowners on the Oregon coast. Don’t worry—getting rid of that unwanted green carpet is easier than you might think. Follow the tips below to remove moss from your roof and prevent it from returning.

Why is Moss a Big Deal?

Moss on your roof is more than just an aesthetic concern. This plant life thrives in damp environments and absorbs moisture, causing roofing materials to rot and deteriorate. It also blocks proper water drainage, increasing the risk of leaks. So, addressing roof moss isn’t just about keeping your house looking neat—it’s about protecting your investment.

Roof Moss Removal Do’s and Don’ts

When removing moss from the roof, it’s important to know what works and what could potentially damage your shingles. Here are some do’s and don’ts to keep in mind:

  • Do use the right products: Choose moss-specific cleaners that are gentle on your shingles. Avoid harsh chemicals, including bleach, which can damage roofing materials and the landscape below.
  • Don’t pressure wash: While it’s tempting to blast that moss away with high-pressure water, this can strip your shingles of their protective granules.
  • Do apply gently: Use a garden sprayer to apply your chosen cleaning solution, and let it sit for the recommended amount of time.
  • Don’t scrub aggressively: Scrubbing can damage the shingles, so instead, gently rinse off the moss with a low-pressure garden hose.

Prevent Moss from Returning

Now that your roof is moss-free, you want to keep it that way. Here are some tips for preventing moss from growing back:

  • Trim overhanging branches: Sunlight deters moss by drying the shingles quickly after a storm. Trimming nearby trees increases sun exposure and prevents rain and snow from dripping off branches onto the roof.
  • Keep the gutters clean: Regular gutter maintenance prevents water build-up, which moss loves.
  • Consider zinc or copper strips: Install metal strips at the ridge of your roof to inhibit moss growth. As the material oxidizes, metal ions wash down the roof when it rains, making the surface much less habitable for moss.

When to Call in the Pros

Sometimes, heavy moss growth proves too much for your DIY efforts, especially if it’s widespread or your roof is steep or high. In these cases, it’s best to call professional roofers with the right equipment and expertise to tackle the job.

Gresham Roofing and Construction has been safeguarding homes from pesky roof moss since 1968. Our team is trained and certified in all aspects of roofing, including moss removal, ensuring high-quality workmanship with every job. If you need help with roof moss removal or have any other roofing concerns, please contact us at (503) 492-7663 today. We proudly serve the Portland Metro Area, including Lake Oswego, Tualatin, Camas, and Vancouver.

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