A reglet is a groove cut into a wall or chimney to receive counter-flashing, which covers and protects the base flashing beneath. It ensures a watertight seal between the roof and vertical structures.

Key Points:

• Can be embedded (cut into the masonry) or surface-mounted.
• Commonly used where roofs intersect with walls or chimneys.
• Helps prevent water infiltration at roof-to-wall junctions.