Plastic Corrugated Sheet Wall Flashing | 3 inch Cement Profile

Plastic wall flashing for corrugated sheets have one side that is flat that is used to seal against the wall and another side that is moulded into the shape of the corrugation profile and laps on top of the sheet to provide a watertight seal. These are fixed through the crowns of the profile to the corrugated sheet, essentially stitching if onto the sheet, white the flat side is flush against the wall and sealed with silicone behind it. This is then supposed to be flashed with a traditional flashing that is then chased into the brickwork to ensure a long-lasting proper seal.