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Cavity Sleeve

Installation Advice

  • Always use in conjunction with a Timloc Airbrick
  • When ventilating through an external wall to a building interior, ensure that the cavity sleeve and airbrick are positioned above the ground floor DPC level. The exact position will depend on what conveniently suits the interior room, installation of the cavity sleeve and airbrick at a high level in the room will help to reduce the effect of draughts
  • When fitted with a Timloc airbrick, the cavity sleeve suits wallls up to 275mm overall thickness, if thicker walls are present, two cavity sleeves may be joined, end to end, and then trimmmed to the required length. Telescopic extensions are also available
  • It is strongly recommended that a section of horizontal cavity tray (Timloc Inter-loc 2) is positioned above the airbrick and cavity sleeve to prevent rainwater tracking aross the top of the cavity sleeve
  • The number of cavity sleeves and airbricks required depends upon the volume of free airflow demanded by the situation
  • For background ventilation into a habitable room, 8000mm² of free area is required. i.e. two 9" x 3" cavity sleeves with airbricks, or a single 9" x 6" cavity sleeve with two airbricks.
  • If ventilating a room containing a heat producing appliance the volume of free airflow will depend upon the type and size of the appliance. Consult the appliance manufacturers technical information, and then provide the appropriate number, size of cavity sleeves and airbricks. Remember each 9" x 3" airbrick provides max. 6170mm² equivalent area.
  • nbs plus
  • riba

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