The answer to 'what is flashing' is that flashing is a key component of roofing systems that helps prevent leaks and water damage. Flashing refers to thin, durable pieces of metal, plastic, or other materials that are installed at roof transitions, edges, and penetrations to create a waterproof seal. Flashing is typically installed around chimneys, vents, skylights, and where the roof meets walls or other roofs to divert water away from vulnerable areas and prevent it from seeping into the home.
Proper flashing installation is critical for the long-term performance and integrity of a roof. It helps protect against leaks, water damage, and potential structural issues that can arise from moisture intrusion. Flashing should be inspected regularly as part of routine roof maintenance, and any damaged or compromised flashing should be repaired or replaced by a professional roofing contractor.