Unfortunately they didn't want the tops done ...Darran
Notice I've sneakily changed the photo
Eco friendly bacterial detergent then soft washDarran
"Eco friendly bacterial detergent then soft wash"Desmococcus olivaceus (green Algae) is not a bacteria…why use a anti bacterial liquid ?Why use a detergent on algae it is not a "dirt"?"Soft washing" is the application of chemicals by low pressure….. Why use a chemical to remove a chemical ? What was wrong with "pressure washing" the wall and then using a biocide afterwards?
How would you have cleaned it Rhinoman?