How To Clean A Tin Roof. Turn the dial back to the “water” setting and rinse down landscaping. Wet & forget works with the rain and wind to get it clean.
Wet the roof with clean water, then spray the cleanser over the metal surface, beginning with the darkest areas of the roof. Turn the dial back to the “water” setting and rinse down landscaping. This is an acid wash that will leave the roof completely clean.
This will remove any scaled rust as well as any flaking paint.
Cleaning mould on tin roof. One thing to look out for is the amount of phosphate in the detergent. Turn the dial back to the “water” setting and rinse down landscaping. Start by power washing the roof.