Robin Leech may stop by later. LolWet N Forget is a great product and the latest (updated) sprayer itself is ideal for large areas, as it makes quick and easy work of a job. The sprayer is actually good enough to do my roof! Nothing other sprayer is this good, at least that I've found.
However, it is incredibly overpriced when you can purchase the very same chemical in the pool section of Walmart "dimethyl benzyl amoninum chlorides" so refill your sprayer with "HTH Algae Guard".
Also, I mix it with liquid pool chlorine 50/50. It is far more effective and lasts just as long.
My house: Instead of pressure washing the mildew and green slime off of everything, I simply use that sprayer. Works perfectly. I can even reach the top of the roof with a ladder.
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It's Ammonia based. It may kill mold & mildew.Has anyone use this product on siding on your house. I do notice that it is not a quick cleaner and it takes a little time to see the results...Anyone use it or the other way.. 30 Second Cleaner that cleans as soon as you apply it...
Newer shingles have bits of copper mixed into the granules on the top of asphalt shingles. Takes care of most of the issues you mention.Ditto to the above.
Around here the black streaking is unavoidable on North facing roofs. I've used it on 3 roofs and it's worked very well. It takes several weeks, but also seems to have a residual effect.
I have that. But on one corner it's shade almost all the time. I hit it with bleach and it kills it off. Last spring I added 50 ft of half inch copper tubbing on the ridge. Waiting on results. They sell zinc strips for that purpose at a fairly cheap price.Newer shingles have bits of copper mixed into the granules on the top of asphalt shingles. Takes care of most of the issues you mention.