Moss on roof


Old 08-24-16, 10:01 AM
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Moss on roof

Hi All, what is the best and safest way to remove moss from asphalt single roof?
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Old 08-24-16, 12:26 PM
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I usually use a pressure washer. You have to use some care so you don't damage the roof or slip and fall off but it's relatively easy once you get up there.
Old 08-24-16, 02:10 PM
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You have to be extra careful using a pressure washer on asphalt shingles! While it's easy to clean the roof that way it's also easy to shorten the remaining life of the shingles. Use as little pressure as possible!
Old 08-24-16, 02:13 PM
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My concern would be, how much of the granular material will go with the moss. I've mostly dealt with lichen and when I rub then off they take most of the granules with them.

If you power wash as Pilot suggested, use minimal pressure and wash from top down.

How old is the roof?

Old 08-25-16, 12:30 PM
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Regarding @Bud9051's advice to wash from the top down, I'd only do that if I could wash the entire roof from the top. I wouldn't want to walk on a wet roof.

If you're able to clean off the moss, then it's time to think about preventing it from returning. I had some luck with a zinc strip that the roofers installed at the ridge. It seems to have lost some effectiveness though.
We also had a tree trimmed to get more sunlight on the roof.

I've been trying to convince my wife that we should get a metal roof, but she's not interested.

Good luck.
Old 08-27-16, 05:50 AM
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Update, because there were only a few spots on the roof , I could reach them from a ladder ,I used a stif scrub brush and got it all off,to many trees to trim in this location.

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