The following 'primary measure' can be instaled as part of the scheme;

• Insulation, including solid wall, cavity wall, underfloor, loft or roof insulation.
• Low carbon heating, such as air-source or ground-source heat pumps
• Solar thermal systems, which provide renewable ways of heating your home.

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;

• Draught-proofing.
• 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.

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.

The voucher scheme for applications will end in March 2021. 

Companies will have a further 6 months to then install products to people who have applied within the timeframe. 

Our advice would be to do this asap as it is going to get very busy for approved installers.

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. For example, the Treasury says a homeowner installing cavity wall and floor insulation costing £4,000 would only pay about £1,320, with the Government contributing the remaining £2,680 through the voucher scheme.

The boosted £10,000 vouchers, where households won't need to pay anything towards improvement costs, will be for those receiving at least one income-based or disability benefit. Only owner-occupied homes or park homes will be eligible.

The qualifying benefits are income-based/contribution-based jobseeker's allowance, income-based/contribution-based employment and support allowance, income support, pension 'guarantee' credit, working tax credit, child tax credit, universal credit, disability living allowance, personal independence payment, attendance allowance, carer's allowance, severe disablement allowance, industrial injuries disablement benefit and housing benefit.

Depending on the measures you have installed will depend on how much you can save. 

All measures installed are energy saving products.

Yes. 

The measures need to be installed by a Trustmark registered company or a company who is registered with MCS. 

All companies will provide workmanship guarantees.