Insulating your home
Domestic heating currently accounts for 25% of UK energy use; we use so much energy for heating because many British houses have little or no insulation, are draughty and lack basic energy efficiency technologies. Cold, damp homes cause excess winter mortality, particularly among the elderly, and living in a cold house greatly increases the risk of contracting a serious illness.
Installing better insulation will address these problems and is the most effective way to improve domestic energy efficiency and raise the standard of UK housing. As well as reducing the carbon emissions from domestic energy use, better insulated homes would save money – especially as fuel prices keep rising.
There are many easy and inexpensive ways to improve the energy efficiency of your home and under the CERT grants scheme almost anyone can get help towards the cost of some of the most effective methods including cavity wall and loft insulation.
Energy advice pages tell give more
Insulating and draught proofing products
The table below outlines the main ways homes or other buildings can be adapted to keep warm more easily. It also gives some of the latest cost breakdowns, information about payback periods and yearly carbon dioxide (CO2) savings.
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Ways of insulating and draught proofing your home
| Measure | Annual saving | Installed cost | Payback period (years) | Yearly C02 saving |
| Cavity wall insulation |
£115 |
£500 |
4 years |
610kg |
| External wall insulation |
£400 |
£10,500-£14,500 |
26 years |
2,100kg |
| Internal wall insulation |
£380 |
£5,500-£8,500 |
15 years |
2,000kg |
| Floor insulation |
£50 |
£100 (DIY) |
2 years |
270kg |
| Filling gaps between floor & skirting boards |
£20 |
£20 |
1 year |
110kg |
| Loft insulation - full 270mm |
£110 |
£250 |
2 years |
800kg |
| Loft installation top up to 270 mm |
£30 |
£500 or £200 DIY |
16 years installed or 6 years DIY
|
230kg |
| Draught proofing |
£20 |
£200 or £90 DIY |
10 years or 5 years DIY |
up to 155kg |
| Hot water tank jacket |
£35 |
£12 DIY |
6 months |
190kg |
| Primary pipe insulation |
£10 |
£10 DIY |
1 year |
60kg |
| Double glazing |
Abot £90 |
Varies |
Varies |
740kg |