4x TIMCO Timloc Throughwall Cavity Sleeve for One Airbrick 1202/1 LOC12021

Timloc's 9x3 Through Wall Cavity Sleeves provide consistent ventilation between interior and exterior walls. They are designed for a single 9" x 3" Airbrick and offer unrestricted airflow. These lightweight sleeves are durable and resistant to decay, suitable for walls up to 275mm thick. For thicker walls, connect two sleeves by joining and trimming their ends. Each sleeve has a maximum area of 6170mm and must be used with Timloc Airbricks. The black sleeves are easy to handle and ensure reliable performance. Install a Horizontal Cavity Tray above the Airbrick and Cavity Sleeve to prevent water intrusion and use a telescopic extension for wider applications. They conform to BS EN ISO 9001 and BS EN ISO 14001 standards. For double interlocked Airbricks (9" x 6"), Timloc's 9x3" Through Wall Cavity Sleeve for 2 Airbricks is available.. Timloc 9x3 Through Wall Cavity Sleeve 1 Airbrick - Box of 20 Black Polypropylene