Comments on: How to Remove and Prevent Algae Stains on Asphalt Shingle Roofs

By: Ben Erickson

Ben Erickson — Mon, 14 Sep 2009 12:58:57 +0000

Hi Sembatya, The above article on removing algae from a room can also be applied to removing moss. Additional information on removing moss can be found in our article How to Remove Moss from a Roof. Good luck with your project.

By: sembatya habib

sembatya habib — Mon, 14 Sep 2009 11:15:41 +0000

i want to clearly know how to remove and prevent algae, moss on clay roofing tiles; the procedure,the cleaner, and other tools so that we can start this project in uganda.

By: Ben Erickson

Ben Erickson — Wed, 19 Aug 2009 16:27:50 +0000

TSP is a strong cleaner (it’s available at home centers and paint stores), but since you aren’t scrubbing your roof with it, it mainly acts to reduce the surface tension and allow the bleach to soak in without running off the roof. It’s the bleach that actually kills the algae. The effect of the bleach should be visible right away, though it will become more pronounced once it has had time to dry. Oxygen bleach, on the other hand, can take several days to a week before the difference is very noticeable.

By: Zan

Zan — Mon, 17 Aug 2009 20:40:33 +0000

Thanks for the help. How long before you see an effect on the shingles with the TSP soulition.

Thanks, Zan

By: Terry Reed

Terry Reed — Sat, 20 Sep 2008 07:21:43 +0000

Found a service called SHINGLE RENEW has a better recipe and tells where to buy cheap,safe chemicals.Informative how to on Cleaning asphalt shingles yourself…http://www.ShingleRenew.com

By: Omprakash De

Omprakash De — Wed, 10 Sep 2008 16:52:15 +0000

What % of Zinc Oxide ,I have to add in a Cement bag to prevent gorworth of moss on side work.

Thank You

By: Dot Moran

Dot Moran — Thu, 14 Aug 2008 02:42:51 +0000

There is a large pond on another persons property across the road from our house. Since these algae spores are air borne, could that contribute to the discoloration on our roof?

By: vicki meister

vicki meister — Sat, 02 Aug 2008 14:14:16 +0000

where do i buy some trisodium phosphate?