Flashing refers to thin pieces of impervious material used to direct water away from critical areas of a roof, such as joints, seams, and penetrations. The primary aim of flashing is to prevent water infiltration, which can lead to structural damage and costly repairs. In the context of metal roofs, flashing is typically made from versatile materials such as aluminum, galvanized steel, or copper, which offer excellent resistance to rust and corrosion.
