How To Clean A Tin Roof. Wet the roof with clean water, then spray the cleanser over the metal surface, beginning with the darkest areas of the roof. Detergents such as laundry detergent, mild dish soap, or car washing soap can also be used to get rid of stains that are a bit more difficult to remove.
Wet & forget works with the rain and wind to get it clean. Mix the product with water for a 1:7 dilution ratio (a gallon covers about 700 to 900 sq. Then wipe the panel again with a cloth.
This is an acid wash that will leave the roof completely clean.
This is the best way to clean a roof if you have asphalt shingles. Turn the black dial to the “off” setting and you’re done! Add an extra hour or two if the humidity is high. After that, you will need to clean the roof with trisodium phosphate, or tsp.