Learn some common methods of cleaning painted metal roofing, from basic detergent to more stringent options. Often simply washing with plain water using a hose or pressure washer is adequate. When that doesn’t cut it – consider this care list.
The Mix
There are several options – the list below includes options that have been tested and proven in a number of environments, and on a number of painted finishes:
Heavy Dirt Deposits:
- One Cup of Simple Green or other non-toxic biodegradable cleaner with less than 0.5% phosphate – dissolved into 2 gallons of warm water.
- One cup of household ammonia dissolved into 5 gallons of room temperature water.
- One third cup of laundry detergent such as Tide per gallon of water.
Mildew or other Fungal Growth:
- One cup of household bleach and 1 cup of a mild soap such as Ivory to 5 gallons of water.
- 1/3rd cup laundry detergent such as Tide, 2/3rd cup trisodium phosphate, 1 quart of household bleach to 3 quarts of water.
The Wash
Work from the bottom to the top of the panels, use a cloth, sponge, soft bristle brush, or low-pressure spray washer.
The Rinse
After washing, rinse thoroughly with clear water to eliminate the potential of residue.
Other Info
For specific cleaning and maintenance – see the downloads below from several metal roof coil coaters.
