Best and worst areas for insulation revealedSouth east lags behind other parts of the UK

17 September 2010

Wall Insulation

Insulation can save up to £160 a year on an average household energy bill

New figures from the Energy Saving Trust (EST) reveal which areas of the UK have the best and worst levels of home insulation, as a result of the government’s energy-saving scheme.

Among the areas with the highest levels of insulated homes are Kirklees and Isle of Anglesey, while the bottom five areas are all in greater London.

Under the Carbon Emissions Reduction Target (CERT) scheme, the six largest energy suppliers must meet targets of helping customers meet the cost of energy-saving measures in their home, including loft and wall insulation.

Saving energy

Which? energy expert James Tallack says: 'Installing loft and cavity wall insulation can save up to £160 per year on an average household bill as well as helping to reduce carbon emissions. So it’s vital that energy suppliers deliver on their obligation to ensure affordable insulation is accessible to as many households as possible.

'Which? research has found that there are big differences in prices being charged by energy suppliers for insulation. For example, loft insulation from Scottish and Southern Energy currently costs £144, whereas British Gas charges £274 for the same work. And local suppliers could be as cheap as £80. You can get insulation through any company so shop around for the best deal and don't assume the supplier you're with at the moment is the cheapest.'

You can also save money on your regular electricity bills by using Which? Switch to find out who is the cheapest supplier for your home.

Best and worst insulation rates

The figures revealed for the first time by the EST show how many homes have had insulation professionally installed in the first two years of CERT, since 2008.

The top five areas, listed by local government and parliamentary constituency, with the highest percentage of housing stock insulated since 2008 were: Kirklees 22.5%, Isle of Anglesey 18%, Carmarthenshire 14.6%, Wyre 13.4% and South Ribble 13.3%.

The worst boroughs were all in London with Westminster coming in bottom with just 0.2% of housing stick having had insulation professionally installed. Others areas languishing at the bottom of the table were Kensington and Chelsea 0.5%, Tower Hamlets 0.5%, Hammersmith and Fulham 0.7% and Southwark 0.7%.

Pressure on energy suppliers

In June 2010 the government extended the CERT scheme to 2012, promising that a further 3.5 million homes would receive home insulation.

Energy and climate change secretary Chris Huhn acknowledged that some types of houses are more difficult to insulate than others, but ultimately wants to see more being done by energy suppliers. 

Speaking in response to the EST figures he said: 'I make no apologies for turning up the heat on energy companies, demanding that they work harder to make more homes warmer and cheaper to run.'

The government plans to reform its energy saving scheme in 2012 by introducing a new Green Deal to help households save on their energy bills.


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You can compare energy prices and switch to a new gas and electricity supplier on Which? Switch. People who switched with us between 1 October and 31 December 2013 are predicted to save an average of £234 a year on their bills.

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