Luckily if you perform the proper maintenance and occasionally do a deeper cleaning you can keep your copper roof looking shiny and new.
Copper roof cleaner.
You can clean copper with a chemical based cleaner such as brasso but you will need a large amount for a roof.
Rinse your clean copper roof with water from your hose.
The copper cleaning gel will not work as well if there is oil or road grime on the copper.
Do not touch any part of your clean roof with your bare hands as the.
Spray copper sulfate over the moss affected roof using a garden or hose end sprayer blending and applying the material at a rate of 1 4 to 1 2 ounce of material per 10 gallons of water.
Use a sufficient amount of water to remove all of the cleaning solution.
Ask at your building supply center for a large volume container of this cleaner.
Apply it with soft flannel cloths over your roof starting from the top in a thick film.
Wet down the copper first then use a 10 bleach solution to wash off the copper.
Wear gloves when touching the copper.
Clean off residue or road grime with a mild solution of bleach and water.