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Removing Moss from a Roof

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September 5, 2010

Removing Moss from a Roof, Cleaning Moss off RoofI recently had my mossy roof sprayed with Spray and Forget and now have a roof covered with dead moss. How do I get this off? It looks worse than when it was green, even though I know this is better. I'd like to know how to get rid of it. Thanks.

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By Joan from Rangeley Plantation, ME

Answers

October 12, 20100 found this helpful

This is from the Popular Mechanics website: www.popularmechanics.com/home/improvement/outdoor.../4217233
They suggested killing the moss then get on the roof with a pressure washer and starting at the top of the roof, spray down the roof

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October 12, 20100 found this helpful

I need to add a warning on killing the moss. Do not use Tide or bleach as these will shorten the life of the roof considerably.

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November 24, 20150 found this helpful

Bleach is what most, if not all, roofing shingle manufacturers recommend using on their products, what you don't want to use is elbow grease... and careful not to sweep away any granules which keep the shingles doing their jobs, if your not exactly sure on how to deal with moss on your roof, hire someone who does.

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February 13, 20170 found this helpful

Do not pressure wash a composition roof! It will ruin your roof. First kill the moss, next sweep lightly or use a leaf blower, pain in the butt, yes, but cheaper than a new roof.

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Next time, do not let moss build up.

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March 9, 20170 found this helpful

If you look at the website for this product you need to brush off the dead moss next....www.askmediy.com/.../ ...That said I would if you are older like me I would do a test section first...choose an area and hose off that area and then let dry and then if needed sit on the roof and brush downward...never upward. The same direction information is for hosing also...notice I did not say pressure washing, since usually pressure washing reduces the lifespan of your roof. This maintenance is just like any other...if you have let it go for too long then it will require several applications. If you are really lucky most of the dead moss will be removed with the hose nozzle without having to brush a lot.

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4 More Questions

Ask a QuestionHere are the questions asked by community members. Read on to see the answers provided by the ThriftyFun community or ask a new question.

September 27, 2015

Does sprinkling dolomite lime hurt a composition roof?


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November 23, 2011

I have a three tab asphalt composition shingle roof. If I use Tide with bleach and spread it by hand all over my roof, I understand it will damage my roof. However, how long will it take a week, month, year, or one to four days to get rid of the moss?

By Ed

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December 3, 20110 found this helpful

First of all in order to grow moss the roof must be staying damp and dark so I would trim up any trees hanging over the roof, especially on the north and east sides.

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Second, moss requires an acid environment to live so your best bet would be to sprinkle some agricultural lime on the roof to cut the acidic condition.
Are you by chance mistaking mold for moss?

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Archives

ThriftyFun is one of the longest running frugal living communities on the Internet. These are archives of older discussions.

September 5, 2010

I have an outside shed that has one side covered with moss. Any suggestions about removing the moss without damaging the shingles?

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May 11, 2009

The problem I have, is that the roof I've got is huge. I bit off more than I can chew in buying this property, and it's getting quite a lot of moss growth. I know I must remove and prevent.

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