Roof Mildew Staining

The bleach degrades into salt which kills microbial growths and the sodium silicate does the same.

Roof mildew staining.

If your household water pressure isn t enough to generate the proper nozzle pressure at the jets the manufacturer recommends boosting it. It is not uncommon for roof shingles to turn black over time. Wet forget moss mold mildew and algae stain remover hose end 48 oz 2 pack 3 9 out of 5 stars 120 rmr 86 instant mold stain mildew stain remover 2 pack 32 oz. The less expensive solution is to spray wash the roof with a 50 percent mix of water and bleach to get rid of the algae.

Mix the soap and water well first then add the bleach. When that happens it is generally caused by mildew algae mold or dirt stains. This will cover 200 sq. But that would only make sense if the shingles were worn out.

You could replace all the roofing with new shingles dark enough to disguise the staining or with shingles laced with copper granules which are lethal to algae.