Cavity insulation installer

You would inject insulation materials into the space in walls, roofs and lofts so people’s homes and other buildings are warmer and cheaper to heat.

You’d make the buildings more fuel-efficient so they’d use less energy.

You’d do a survey before the installation to work out which methods and materials to use. You’d write a report for the customer and your manager.

You’d work out the volume of space that needs to be filled and calculate how much insulation will be needed.

In the building, you would:

• Mark the ventilation, wiring and pipework ducts in walls
• Seal up openings such as air vents
• Drill a pattern of holes into the walls
• Inject insulation materials into the spaces in the walls through the holes
• Fill the holes and re-point the mortar, so it matches the original colour of the walls
• Check that all the airbricks and flues are clear

You need to make sure that the materials and methods you and the team use meet building regulations.

You’d use special tools including hand-held electric and pneumatic drills, and injection pumps. You’d often work from a ladder, scaffolding or cradle equipment, so you’d need to follow health and safety rules.

You might also fit soundproofing materials in a building or sometimes remove insulation materials, for example for a demolition job.