need a product to kill roof moss
I have a steep shingle roof that has a bit of moss growing on the north side of it. Obviously the long term solution is to trim the trees that block light to the roof and use the anti-moss metal strips when I put a new roof on. For now though 1-3 years max what can I do to kill the moss and keep it from damaging the shingles?
I saw on this old house they used a garden sprayer with 1/2 water and 1/2 bleach but a lot of people say that method can damage the roof and gutters also.
Are there any commercial products or homebrews you guys would suggest?
Use a sprayer with bleach and water, but I wouldn't go half and half. Too much bleach will cause the shingle to dry out prematurely, become brittle and crack/break off.
25% bleach should work. Don't use a pressure washer though.
If you want a new roof, check out Atlas Pristine shingles. They are guaranteed not to mold, mildew, moss over or stain for 15 years or you get 100% labor and material replacement (not pro rated). It is the #1 selling shingle in the pacific northwest for a reason.
Copper Sulfate solution or crystals. It will kill your grass if it gets on it though.
Or, pee on it. [it really does work though I don't recommend doing it on a roof]
I use MossOut granules.
For moss that is established I mix it with water in a garden sprayer.
As a preventative I sprinkles the dry granules on areas that are likely to grow moss.
Any rain will dissolve the gravunles and spread the product where it needs to be.
The moss dies off pretty quickly. If it was a thick growth, you'll have to scrape away the tufts.
Some prevention for it at link.
Try distilled water too.