What Is Flashing on a Roof? Guide to Types and Installation
Roof flashing is a crucial yet often overlooked component of a durable roofing system. It refers to thin material—typically metal like aluminum, copper, or galvanized steel—installed to direct water away from vulnerable areas of the roof that are prone to leaks. These include spots where the roof intersects with walls, chimneys, skylights, or vents. Flashing acts as a barrier, preventing water from seeping into joints and roof penetrations that could otherwise lead to rot, mold, and costly damage. By guiding water safely into gutters and away from the structure, flashing helps maintain the integrity of the entire roofing system. Different types of flashing are available to suit various roof styles, climates, and budgets.