Almost half the UK’s homes are not properly insulated, the government has revealed.
Latest estimates from the Department of Energy and Climate Change showed that only 57 per cent of the UK’s lofts have been properly insulated.
Only 58 per cent of cavity walls have been filled with insulation, the data showed.
Officials said householders were wasting at least £100 a year on bills as a result. The announcement came ahead of the start of the Green Deal next year, which the government hopes will encourage homeowners to provide energy efficiency measures for their homes.
The government is also demanding energy companies help some households insulate their homes by December 2012 under obligations imposed on power firms known as the Carbon Emissions Reduction Target.
Today’s figures show that 479,000 homes have had insulation professionally installed so far under the target.
Energy and Climate Change Secretary Chris Huhne said: “At a time when money is tight and with energy prices predicted to rise, householders are missing out on over £100 of savings every single year by not getting their lofts lagged and cavity walls filled.
“We are making energy companies do more to help their hard-pressed customers with another 3.5m households set to be protected against higher bills by the end of next year.”