To qualify for any financial support, you’ll need to be installing at least one of the following “primary” improvements:
- Insulation, including solid wall, cavity wall, underfloor, loft or roof insulation.
- Low carbon heating, such as air-source or ground-source heat pumps, or solar thermal systems, which provide renewable ways of heating your home.
If you already have these measures installed, you can use the vouchers to install “top-ups” – for example, additional loft insulation so it reaches the recommended level – but not to replace what you already have.
Then if, and only if, you’re installing at least one of the improvements above, you’ll also be able to use the vouchers to install the following “secondary” measures:
- Double or triple glazing, or secondary glazing,but only if you currently have single glazing – it won’t cover replacement double glazing.
- Energy efficient doors, where you’re replacing doors installed before 2002.
- Heating controls and insulation,including appliance thermostats, hot water tank thermostats, hot water tank insulation, smart heating controls, zone controls, delayed-start thermostats and thermostatic radiator valves.
But crucially, you can only receive funding for these secondary improvements up to the amount of funding you’re receiving for the primary measures. So for example, if you’ve received £1,000 towards cavity wall and roof insulation, you can only receive a maximum of £1,000 towards any secondary measures, such as double glazing or thermostats.
For most homeowners, the vouchers will be worth about two-thirds of the cost of the energy efficient improvements, up to a maximum of £5,000 per household.
Landlords of private rented and social domestic housing can also use the scheme
To be part of the scheme, tradespeople must register for TrustMark or Microgeneration Certification Scheme accreditation.