An essential element of a professional aluminum metal roofing Singapore installation is a high-quality, self-adhering synthetic underlayment. While the metal itself is waterproof, the underlayment provides a critical secondary moisture barrier, protecting the structure from wind-driven rain penetration at seams and from condensation that may form on the underside of the cool metal pan... https://kkroofspecialist.com.sg/aluminum-metal-roofing-singapore/