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Qualification Details

Gas Safety for Cavity Wall & Loft Insulation Installer

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General Information

Gas Safety for Cavity Wall & Loft Insulation Installer
Gas Qualifications
CWLII, CWLIECI
5 years

Course Structure and Learning Outcomes

1 day

This course is aimed at operatives involved in the work of installing cavity wall and loft insulation. It will also be suitable for operatives who install external cladding systems.

The course and certificate, where relevant and applicable to the work being carried out by CWI's, is based upon the following elements of Appendix 6  of the  ‘Standards of Training in Gas Work’ document published by IGEM and E&U Skills.

A6.1 - Safety Legislation and basic safety

A6.2 - Combustion and its control

A6.3 - Flues and Ventilation

A6.5 - Domestic pipework installation (Cladding installers only)

The course also covers other areas of relevant gas safety legislation and standards including the Gas Safety (Installation & Use) Regulations, Health & Safety at Work act and HSE RIDDOR.

This course is recognised by the Cavity Insulation Guarantee Agency (CIGA).

Note: ACOP 20 Was replaced by Standards of Training in Gas Work from 1st April 2014

  • The risks associated with the installation of CWLI in domestic dwellings where gas and other fossil fuel appliances are installed.
  • How to reduce the risk of affecting the safe operation of gas appliances and other fossil fuelled appliances fitted in domestic dwellings.
  • The different types of chimney systems and gas appliances fitted in domestic dwellings.
  • How chimney systems work
  • Combustion of gas and other fuels
  • Legal obligations and responsibility

Prerequisites and Assessment

It will be essential that the candidate is experienced in installing cavity wall or loft insulation or external wall cladding.

Assessment is carried out using multiple choice questions

Related Qualifications and Resources

LCL Awards Level 2 Award in Gas Safety Awareness in Residential Premises
IGEM Website The Cavity Insulation Guarantee Agency National Insulation Association HSE Domestic Gas Section

Additional Learner and Centre Information

What Careers Can this Course Lead To?

This course is designed to support insulation or external cladding installers by enhancing their gas safety awareness. It helps operatives:

  • Work safely around gas appliances during insulation or cladding jobs
  • Meet recognised industry safety standards
  • Gain recognition by the Cavity Insulation Guarantee Agency (CIGA)

It is not a route into gas work but provides essential awareness for working safely alongside gas systems.

What Progression Opportunities Will Be Available To Me After I've Completed This Course?

Upon completion, learners may choose to progress to more advanced safety or energy efficiency-related qualifications, or broader training in domestic retrofit or insulation installation practices.

Progression depends on your current role and professional development goals.

What is Involved in Delivering This Course?

Centres delivering the Gas Safety for Cavity Wall Insulation Course must be approved by LCL Awards and have teachers with relevant industry experience and appropriate qualifications.

Assessment involves the learner answering multiple-choice questions. Centres must adhere to the requirements of the LCL Awards' Approved Centre Quality Management System and the Centre Agreement in delivering the certification’s examinations and assessments.

Centres must ensure the course is delivered by teachers with experience in both gas safety and insulation practices.

Teachers must hold relevant teaching qualifications and have a strong understanding of the IGEM document Standards of Training in Gas Work.

Course delivery is classroom-based in one day.

The course content must cover combustion principles, flue and ventilation requirements, safety legislation, and how insulation work can impact gas appliance performance. 

Learners must understand their legal responsibilities and how to recognise potential risks in domestic settings.

Assessment is completed by answering multiple choice questions, which assess the learners’ knowledge of gas safety awareness in relation to insulation or cladding work.

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