Dealing with existing roof penetrations is a major focus area for any professional metal roof contractor. Skylights, vents, pipes, HVAC curbs, and exhaust fans all require specialized flashing techniques to ensure a watertight seal where the metal panel meets the intrusion. Simple sealants are not sufficient; the best practice involves using custom-fabricated metal flashings that are ... https://kkroofspecialist.com.sg/metal-roof-contractor/