Home Insulation

Save energy and reduce your energy bill by insulating your home with loft and cavity wall insulation

Compare loft and cavity wall insulation

  • You could reduce your energy bill by up to £390/year*
  • Insulate your loft for as little as £149
  • Cavity wall insulation for as little as £149

Home insulation could enable you to save energy and reduce your energy bill by up to £390/year*. A typical house can lose half of the heat through the walls and loft. If your house has a cavity wall, but no insulation, you could benefit from installing cavity wall insulation. Similarly the recommended level of loft insulation is 270mm; if you have less than 160mm, you would benefit from insulating your loft to prevent heat loss through your roof.

Home insulation offers from the big energy suppliers

Supplier Cavity wall Standard loft
(less than 60m existing)
Top-up loft
(more than 60mm existing)
Npower from £149 (1) (price may vary) from £149 (1) (price may vary) from £149 (1) (price may vary) Please contact the
supplier directly
British Gas from £199 (1) (price may vary) from £199 (1) (price may vary) from £199 (1) (price may vary) Please contact the
supplier directly
EDF Energy £199 (2) (price may vary) £199 (2) (price may vary) £199 (2) (price may vary) Please contact the
supplier directly

Priority groups include people receiving certain benefits, such as housing benefit and income support. Please check for details with the supplier or on the application forms to see if you qualify for free or reduced prices.

Cavity Wall Insulation

Cavity wall insulation

Generally, homes built between 1930 and 1995 have empty cavity walls. Cavity wall insulation simply involves filling the cavity with an insulating material, usually by drilling small holes in the wall and injecting the insulating material until the cavity is filled. Depending on the size of your home this process usually takes around 2-3 hours.

Costs can be as low as £149 (or free if you qualify) and you can save you up to £270 on your energy bills.

Loft Insulation

Loft insulation

Loft insultation is an effective way to save energy and money on your energy bills and can cost as little as £149 (or free if you qualify). The current recommended level of loft insulation is 270mm (10.5"). If you have less than this or if you have no loft insulation at all you can benefit by losing less heat through your roof.

Insulating your loft, simply involves laying rolls of mineral wool fibre (or some other insulating material) between and across the joists in your roof space and the work usually takes around 1-2 hours depending on the size of your property.

Apply for Home Insulation

All of the big domestic energy suppliers provide solutions for reducing energy consumption as part of the Carbon Emissions Reduction Target (CERT). Please use the apply links in the comparison table to apply online, where no apply button is available you will need to contact the supplier directly.

(1) Prices are based on an average sized three-bedroom semi-detached home. Eligible only for measures recommended by the appointed surveyor. Prices may vary and are subject to change and exclude any scaffolding and specialist equipment if required. Discount on standard prices as at August 2010 on both loft and cavity wall insulation. This offer cannot be used in conjunction with any other British Gas insulation offer.

(2) This offer is available for all heating fuel types. These prices and the free insulation offer apply to standard properties with up to 4 bedrooms. Additional costs will apply to large /non standard properties. You will be advised of any extra costs for additional areas at the time of survey which should be based on a standard rate of £5.00 per m2 inc. VAT. All boarded walkways in lofts are charged extra. If you receive income or disability related benefits, or are aged 70 or over, you may qualify for work to be carried out free of charge. Offer is subject to a site survey. All information is correct at time of going to print, but subject to change

*£390 savings a year figure is for 1940's 3 bed semi detached home with a ten year old gas boiler and a gas price of 3.73p/kWh, when cavity wall insulation and loft insulation are installed. More modern homes save less. Individual savings depend on a large number of factors and the £390 quoted should be treated as a guide;

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