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1143 Cavity Wall Weep

The multi-function 1143 cavity wall weep designed for cavity ventilation and reliable discharge of water from inside cavity walls. This could be over external lintels or wherever a cavity tray system is installed.

The 1144 cavity wall weep extension offers a +50mm extension and connects directly onto the 1143 cavity wall weep.

For use in any situation where water must be discharged from an external wall, including:

  • At ground floor slab level
  • Within cavity tray systems
  • Over external lintels
  • Where a cavity must be ventilated
  • On external walls – 100mm or more in thickness – built from brick, block, or stone
How to Order Full Datasheet

Product Information

Cavity Wall Weeps

LengthColourProduct Code
100mmVarious1143

State required colour at the end of the required product code: TE:Terracotta BU:Buff BR:Brown CL:Clear WH:White GR:Grey BL:Black BB:Blue Black

Cavity Wall Weep Extension

LengthColourProduct Code
50mmNatural1144

NB. 1143 Airflow = 165mm2 Free area/unit

  • Purpose made and pre-formed to guarantee reliable discharge of water
  • Less prone to inadvertent pointing-up than weep holes formed by simply leaving the perp. joint open
  • Integral front grille prevents entry of large nest building insects into the cavity when using product 1143
  • Range of colours to blend with brick or mortar colour: Terracotta, Buff, Brown, Clear, White, Grey, Black or Blue Black
  • Longer lengths built up with extension pieces
  • Satisfies all NHBC requirements
  • Manufactured to BS EN ISO 9001 and BS EN ISO 14001
  • Complies with all relevant Building Regulations
  • Meets all relevant British Standards
  • 1143 is injection moulded in UV stabilised polypropylene.
  • Product 1143 is available in a choice of Terracotta, Buff, Brown, Clear, White, Grey, Black or Blue Black.
  • Products 1144 is available in Natural only.
  • Wall weeps should be used wherever water could collect inside a cavity wall, such as over external lintels, or wherever a cavity tray system is installed.
  • To work effectively wall weeps should be placed directly on top of the base of a cavity tray or DPC, or on the front flange of the lintel.
  • Wall weeps should be spaced at 450mm centres to comply with NHBC recommendations.
  • Care should be taken to ensure the wall weep is kept clear of mortar and does not become blocked. This is particularly important at the back of the weep which could be blocked by mortar droppings from above.
  • To calculate quantities, divide the overall length of the cavity tray, DPC or lintel by 450mm and round up to the nearest whole number.
  • Check that the external wall is a standard 102.5mm brick or 100mm block thickness, if it is not please state the thickness on your order.
  • State the product number, type, colour etc. on your order.

F30 Accessories/sundry items for brick/block/stone walling.

Clause 132 | WEEP HOLES

  • Form with plastics perpend units to manufacturers recommendations at not greater than 900mm centres immediately above base of cavity, external openings and stepped dpcs. Provide not less than two weep holes over openings.
  • Manufacturer: Timloc Building Products, Timloc House, Ozone Park, Howden, East Yorkshire, DN14 7SD. T: 01405 765567 W: www.timloc.co.uk
  • Reference: 1143/1144
  • Colour: Terracotta, Buff, Brown, Clear, White, Grey, Black or Blue Black

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