How To Clean A Metal Roof Before Painting. After that, remove them by rinsing with water. Like all your household or outdoor items, you need a clean colorbond roof, which means you should come up with a cleaning schedule to keep the metal looking its best and extend the life of the roof.
It is recommended that cleaning either of these be accomplished with a mild solution of detergent. Clean cut painting’s premium roof paint formula is uv and mildew resistant. If your roof is unpainted, prime it with a metal primer.
I considered trying to use a pressure washer but there was no good way to access the entire roof with the wand, and i was also concerned that i might inadvertently catch the edge of a shingle and end up ripping a couple off by accident.
However, many metal roof owners want to retain or restore the luster that their metal roof provided when it was brand new. Now that your roof is cleaned and primed, you can start painting. It is recommended that cleaning either of these be accomplished with a mild solution of detergent. Acid etch galvanized metal surfaces with a 1:20 solution of ‘’rust off’ (rust and oxide remover) and water to clean.