The longevity of your installation depends heavily on the metal-roof-contractor and their choice of fasteners and flashing. High-quality contractors use stainless steel or galvanized screws with EPDM washers that resist UV degradation. They also custom-fabricate flashing for chimneys and valleys on-site to ensure a perfect fit. This attention to detail prevents the most common failure... https://kkroofspecialist.com.sg/metal-roof-contractor/