The answer to 'which is better flashing or' is that flashing is generally better than caulking for sealing roof penetrations and edges. Flashing is a metal or other waterproof material that is installed around chimneys, vents, and other roof openings to prevent leaks. It is more durable and long-lasting than caulking, which can dry out and crack over time. Flashing provides a stronger, more reliable seal that is less prone to failure.
Flashing is a critical component of a roof system, as it helps to direct water away from vulnerable areas and prevent water intrusion. It is typically made of materials like aluminum, galvanized steel, or copper, which are highly resistant to the elements. Caulking, on the other hand, is a flexible sealant that can be used to fill gaps and cracks, but it is not as durable or long-lasting as flashing.