What should I use to kill mold and moss common here in New England growing on my roof?

Question

We have already removed the trees to allow more sunlight and I was told bleach will cause damage to the asphalt shingles.

Answer 1

http://www.askthebuilder.com/539-Removing-Moss-and-Algae-From-Roofs.shtml

Answer 2

I would first try bleach and water. Mix equal parts and use a hand pump sprayer with a mist spray. I would spray the area enought to make it damp. Let the sun work on it a couple of days and if looks like it is killing the mold and moss do it again. The hotter the day the better. I really don't think that diluting the bleach will harm the shingles. If you want you could use 2/3 water and1/3 bleach to start off with.

Answer 3

I've used bleach and no damage, but the results with moss was limited. I have been told that a zinc strip put on the roof will kill and keep moss away.

I used a snow rake to scrape the moss off after Chlorine treatment then I hosed to roof with water and then used a herbicide.

Careful using the herbicide, when it washes off it ,may kill plants at the base of your house.

Answer 4

I have heard of using a copper or brass strip at the peak of the roof to keep mold and moss at bay. I have never had to confirm it but having grown up in New England, my neighbors swore by it.

Answer 5

From British Columbia rainforest comes a recommended CMHC solution. 'Zinc Powder' or 'Moss Killer' and used after a rain while the roof is still damp.

Answer 6

A strip of copper or zinc at the peak of the roof will kill anything growing on it. Both are toxic to plant life.

Answer 7

Its called Moss B Gone and it comes in a tall cylinder shaped can, works great..

Answer 8

I dont know the answer , but I need to know the answer. I will be watching your question. I know theres a spray to put on your roof that gets rid of it. But I cant find it. Good Luck