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Through Wall Cavity Sleeves Ventilators and Extension Accessories

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.

View product range & add to quote

Features & Benefits

  • Unrestricted free airflow
  • Lightweight and easy to handle
  • Durable and totally resistant to decay
  • Dedicated extension and draught reducing accessories available

Applications

  • To provide ventilation through external walls to the building interior.
  • When fitted with a Timloc airbrick, the cavity sleeve suits walls up to 275mm overall thickness.

Technical Information

Product 1202-1

Suits a single 9”x 3” Timloc airbrick and provides a maximum equivalent area of 6170mm².

Product 1237

+ 90mm extension piece that fits to rear of 1202-1 to give maximum extension of 365mm.

Product 1202-2

Suits a stack of two interlocked Timloc airbricks (9”x 6”) and provides a maximum equivalent area of 12300mm².

Product 1236

+ 90mm extension piece that fits to rear of 1202-2 to give a maximum extension of 365mm.

Product 1238

Baffle to offer in-line draught reduction - compatible with both 1202-1 & 1202-2.

Calculating Quantities

  • The number of cavity sleeves and airbricks required depends on the volume of free airflow demanded by the situation.
  • Assess the background ventilation required for the application and determine which sleeve is appropriate.
  • Remember to order the correct number of airbricks for each cavity sleeve and possible telescopic extension sleeves.

Installation Advice

If there is any doubt regarding the correct method of installation please don’t hesitate to contact the Timloc Technical Team for further advice.

  • Always use in conjunction with a Timloc airbrick.
  • When ventilating through an external wall to a building interior, ensure 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 high level in the room will help reduce the effect of draughts.
  • When fitted with a Timloc airbrick, the cavity sleeve suits walls up to 275mm overall thickness.
  • If thicker walls are present, two cavity sleeves may be joined, end to end, and then trimmed to the required length (telescopic extension accessory 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 across the top of the cavity sleeve.
  • For background ventilation into a habitable room 8000mm² of free area is required. i.e. two 9” x 3” cavity sleeves and airbricks, or a single 9” x 6” cavity sleeve and two airbricks stacked one above the other.
  • If ventilating a room containing a heat producing appliance the volume of free airflow will depend on the type and size of the appliance.
  • Consult the appliance manufacturers technical information, and then provide the appropriate number and size of cavity sleeves and airbricks. Remember that each 9” x 3” airbrick provides max. 6170mm² equivalent area.

Quality and Standards

  • Manufactured to BS EN ISO 9001 and BS EN ISO 14001
  • Satisfies all NHBC requirements
  • Complies with all relevant Building Regulations
  • Meets all relevant British Standards

Material and Colour

  • Manufactured by injection moulding in polypropylene
  • Available in black only
  • nbs plus
  • riba

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