Through Wall Cavity Sleeve Extension 9 x 3 Black

Tough, flexible cavity sleeves and baffle and extension accessories, to provide ventilation through external walls to the building interior.

This product is always to be used in conjunction with Timloc airbricks (1201AB range).

2 sleeves may be joined together end to end and trimmed and telescopic extensions are available for wider cavity applications.

Range presents solutions to suit single (9" x 3"), double (9" x 6") and triple (9" x 9") interlocked and stacked airbricks.

It is strongly recommended that a section of horizontal cavity tray (Inter-loc 2 or System 2000) is positioned above the airbrick and cavity sleeve to prevent water tracking across the top of the cavity sleeve.