The longevity of a metal roof paint job in Singapore is 90% dependent on surface preparation. Before any primer is applied, the roof must be thoroughly cleaned using a high-pressure washer (often paired with specialized cleaning agents) to remove all dirt, grease, mold, mildew, and chalking residue from old paint. Mold and algae growth is particularly aggressive in the high-humidity e... https://kkroofspecialist.com.sg/painting-metal-roofing-singapore/