How To Clean A Metal Roof On A House. First determine if you are able to walk on your metal roof, if you are able to attach a harness. We don’t recommend that approach.
It can lighten the color of your roof and “bleach” anything the overspray contacts. You should shoot for detergent with less than 0.5% phosphate. Green algae, black mold, and moss begin to die off on contact.
Pine sap, decaying leaves, and even road dirt that’s drifted into the air can settle on your metal roof and stain it.
When it comes to roof cleaning, it is important to follow and adhere to necessary safety measures. It doesn’t hurt to have somebody or something constantly watering the plants while the roof cleaning evolution is taking place. A natural disinfectant, it is strong enough to eliminate most bacteria and removes any build up of mildew, as well. And the runoff harms plants.