Corrosion mitigation is a daily concern for due to the combination of high humidity and the presence of atmospheric chlorides near the coast or industrial pollutants in urban areas, classifying the environment as C4 or C5 corrosive categories. To combat this, materials must have a heavy metallic coating mass, with Galvalume (AZ) coatings often specified at AZ200, which is a zinc/alum... https://kkroofspecialist.com.sg/metal-roofing-singapore/