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Forming of cavities and correct installation of ties


The purpose of training delivered against this standard is to provide candidates with the practical skill and knowledge to be able to safely and effectively construct a cavity, paying particular attention to the correct fixings of wall ties.

Standard details

CITB has developed this standard in discussion with industry


1 day of 6 learning hours


The purpose of this standard is to provide the delegate with the knowledge to support the following:


  • introduction to why a cavity wall is used in constructing buildings
  • advantages of cavity walls
  • introduction to why wall ties are used when constructing cavity walls
  • weep holes and air bricks and where to place them
  • fixing insulation boards in the cavity
  • the hazards and defects associated with not correctly using wall ties in cavity construction
  • types and shapes of wall ties used in cavity construction and the different uses
  • importance of keeping the cavity clean
  • spacing and embedment of wall ties in cavity construction
  • how to construct a cavity wall
  • tools and equipment used to construct a cavity wall
  • standards and regulations

Occupational relevance

Training delivered against this standard would be relevant to the following occupational group(s):

  • operative and craft
  • supervision
  • management and leadership

Candidate pre-requisites

There are no delegate pre-requisites as part of this standard, however a basic knowledge of bricklaying terminology and techniques would be beneficial.


As a minimum, course trainers must be able to demonstrate that, in relation to this standard, they have:

  • an award in education and training (or equivalent, as per requirements for approved training organisations)
  • successfully completed training to this standard
  • at least 2 years relevant industrial experience
  • a verifiable CV


Delivery may be in an on or off the job environment.

All materials and equipment must be of a suitable quality and quantity for delegates to achieve learning outcomes and must comply with relevant legislation.

The class size and delegate/trainer ratio must allow training to be delivered in a safe manner and enable delegates to achieve the learning outcomes.

The following delivery methods may be used in the delivery of this standard:

  • classroom
  • a blend of classroom and e-learning
  • a blend of classroom and remote

This standard is considered to contain 51% or more practical training.

This standard is considered to be set at an intermediate level.


Methods of assessment considered appropriate for training delivered against this standard are:

For the successful completion of training, delegates must complete an end of course practical assessment or knowledge test that measures all learning outcomes and has a pass or fail criteria.

Where this training is assessed using multiple-choice questions, a minimum of 10 questions must be asked and delegates are required to achieve an overall pass mark of at least 75%.

Quality assurance


Quality assurance against this standard will require initial approval of the training organisation and their content mapped to the standard.

CITB will also conduct an approval intervention, either desk-based or centre visit, to ensure the training organisation can meet the requirements of the training standard.

Approved training organisations (ATOs) will be required to present information on records of training and assessment upon request to CITB for desk-based analysis. They will also be visited annually by the CITB quality assurance team.


Renewal every 3 years


Mandatory Renewal

Approval date


Review cycle

Either on request or in 3 years from approval date.

Learning outcomes

The candidate will be able to:

  • discuss what a cavity wall is and why they are used in constructing a building
  • discuss the advantages of using a cavity wall
  • discuss why wall ties are so important to use in cavity construction and the hazards and defects associated with non-compliance
  • identify the correct spacings and embedment for wall ties
  • list the different wall ties used for various structural substrates
  • describe why weep holes and air vents are used and where to place them
  • discuss how to keep the cavity clean and why this is important
  • list the tools and equipment used for cavity construction
  • discuss what insulation boards are used in cavity construction and how to install them using the correct wall tie
  • read and understand masonry setting out drawings and specification of wall ties
  • construct a cavity wall following all health and safety procedures

Additional information about this standard

This standard was written by The Association of Brickwork Contractors (ABC) who deliver training against this standard through The ABC Assessment Centre.



Related standards

PD 6697-2010 - Recommendations for the design of masonry structures to BS EN 1996-1-1 & 1996-2

Eurocode 6 - Part 1-1: General rules for reinforced and unreinforced masonry structures

Eurocode 6 - Part 2 : Design considerations, selection of materials and execution of masonry

NHBC Standards


The Construction Fixings Association


Installing fire barriers and breaks

Bonding, taping and positioning insulation board

Specialist damp proof course cloak systems