Removing Moss from Asphalt Roof Tiles

March 31, 2010

Removing Moss from Asphalt Roof TilesFor the past 30 years I have done the following:

Dilute plain laundry bleach with water, one part bleach and three parts water. Apply with a pump garden sprayer. Apply when the moss is reasonably dry and thirsty like several days after the last rain. Wet it all; any you miss will not be killed.


In a few days the moss will turn brown and can be swept/brushed away. I just leave the dead moss alone and eventually it will go away. Anyone concerned about the bleach on the roof understand that sunlight will neutralize the chlorine shortly.

By Dale from Poulsbo, WA

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Here are the questions asked by community members. Read on to see the answers provided by the ThriftyFun community.

January 25, 2014

Where can you find zinc sulphite? Is it readily available at any hardware store or a custom store/order item?

By Bryce


February 22, 20180 found this helpful

You can buy zinc sulphate at your local farm store.


Gold Post Medal for All Time! 677 Posts
February 22, 20180 found this helpful

Peaceful Valley Farm Supply.

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April 9, 2015

How long do you allow the bleach solution to soak into the roof moss? Do you rinse with water afterwards?

By Bruce T from Victoria, BC


Gold Post Medal for All Time! 969 Posts
April 10, 20150 found this helpful

I use dollar store (or any powder) laundry detergent. Seriously. If scattered on the moss, it turns it brown and kills the roots. You then simply brush it off with a brown.


As a former property manager, I used this method for my sidewalks. It's cheap and easy to do. I hope this helps. Here are some other things you can do.

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September 24, 2013

Can I use Dawn dish soap and water to get rid of moss on an asphalt roof?

By Su


Gold Post Medal for All Time! 969 Posts
September 25, 20130 found this helpful

It will make so much slimy work it isn't worth it. I used dollar store laundry detergent, sprinkle it on and in four days it is brown and the roots are dead. Most of the time you can just brush it off with a broom. I hope that helps.

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May 23, 2013

I am at the moment using a regular broom can I use a wire brush?

By Joan A from Courtenay, B.C.


October 20, 20130 found this helpful

You never want to use a wire brush on shingles of any kind especially asphalt shingles as it will begin to remove the little rocks that protect the shingle. Just a nylon scrub brush should do the trick.

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

March 31, 2010

I was wondering if anyone knew how to remove Moss from my asphalt roof tile. I remember hearing about a laundry detergent but I can't remember which one? Laura From BC

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