The vouchers cover home improvements in 2 categories:

Primary Measures 

These cover insulation or low-carbon heating and include:

  • solid wall insulation (internal or external)
  • cavity wall insulation
  • under-floor insulation (solid floor, suspended floor)
  • loft insulation
  • flat roof insulation
  • pitched roof insulation
  • room-in-roof insulation
  • insulating a park home
  • air-source heat pump
  • ground-source heat pump
  • solar thermal (liquid filled flat plate or evacuated tube collector)
  • biomass boiler
  • hybrid heat pump

Secondary Measures 

These cover windows, doors and heating controls, and include:

  • draughtproofing
  • double or triple glazing (where replacing single glazing)
  • secondary glazing (in addition to single glazing)
  • energy-efficient replacement doors (replacing single-glazed or solid doors installed before 2002)
  • hot water tank thermostat
  • hot water tank insulation
  • heating controls (such as appliance thermostats, smart heating controls, zone controls, intelligent delayed start thermostat, thermostatic radiator valves)

If you install at least one primary measure, your voucher can be used to help cover the cost of any of the secondary measures, as long as the cost of the secondary measures does not exceed the amount you get for primary measures.

The voucher can be used to pay for:

  • labour
  • materials
  • scaffolding
  • VAT

Additional works will be covered by the voucher if they are necessary for the installation of measures.