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Cavity insulation installers fit insulation materials into buildings, such as damp proofing, loft insulation and cavity wall insulation.

Average salaries are in the region of £12,000.00 to £45,000.00. Salaries will vary depending on location / employer

Career Profile

Cavity insulation installers fit insulation materials into buildings, such as damp proofing, loft insulation, sound proofing and cavity wall insulation. This work will reduce energy costs of the building and is good for the environment. 

What they do

Cavity insulators often work in small teams and work on individual properties on behalf of a house owner to insulate a person’s home. Cavity insulation installers would also work on larger commercial projects such as schools and hospitals. 

Installers may carry out pre-installation surveys and write reports for the client identifying the work required with possible solutions.

This kind of work is very physical, and you would have to work from height and in cramped conditions. You would use a variety of tools, and you would be required to wear personal protective equipment (PPE) and be aware of health and safety procedures. 

Typical tasks include:

  • Carrying out pre-installation surveys to work out methods of insulation and the materials to be used
  • Writing up survey reports for customers and managers
  • Suggest ways to improve the energy use of a building
  • Working out volumes of space to be filled and the amount of insulation required
  • Marking out wiring, ventilation and pipework ducts in walls and sealing openings
  • Injecting insulation materials through drilled holes in a specific order
  • Check that all airbricks and flues are clear
  • Make sure that the materials and methods used meet building regulations


This work takes place on-site, both indoors and outdoors in a variety of buildings, including homes, schools, hospitals and commercial buildings. 

Typically the working week is 40 to 45 hours and may include weekends. 

  • Starting salaries for trainee installers can be between £12,000 to £14,000 per year
  • Experienced Installers can earn up to £20,000 per year
  • Senior Installers can earn up to £30,000
  • These figures are intended as a guideline only and can vary.

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Qualifications & Training

Employers may ask for GCSEs/Standard Grades in Maths, English (or the Welsh Baccalaureate) or Design and Technology. As there is not always a need to have qualification, experience of brickwork may be useful but not essential. If you have a qualification in general construction such as a Level 2 BTEC First Certificate or Diploma in Construction this may be an advantage. 

To become a trained installer you would work under the supervision of an experienced installer and would take a number of short course offered by the product manufacturers. To become a fully trained installer can take between 3-6 months. 

You can also chose to work towards the SVQ/NVQ Level 2 Insulation and Building treatments (Construction) which cover units such as loft insulation, damp proofing and cavity wall insulation.

Cavity insulation installers may also work on the Green Deal initiative which is a government project to make houses more energy efficient and cut carbon emissions. To undertake Green Deal work you will need to work for an organisation certified by a Green Deal certification body as meeting the standard in the Publicly Available Specification (PAS) 2030. 

Installers may take additional short courses and further training combined with experience which may result in progression within the job role and the energy efficiency arena.

In Scotland go to My World of Work for more information.

Want to find out more?

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Career trends and forecasts

55,480 total people needed

The UK construction industry will need a total of 55,480 specialist building operative roles (which includes cavity insulation installers) to meet demand between from 2017 - 2021, according to the latest Construction Skills Network research (LMI). The majority of this demand will be in East of England and East Midlands.

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