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How Much Will I Save?


How much could you save through cavity wall insulation?

Building

Detached Semi detached Mid terrace Bungalow

Flat

Annual saving  £250  £145  £95  £100  £75
Installation cost  £720  £475  £370  £430  £330
Payback time 5 Years or fewer
Carbon dioxide saving per year  1040kg  600kg  395kg  410kg  325kg

How much could you save through roof and loft insulation?

Loft insulation
(0 to 270mm)

Detached house Semi detached house Mid terrace house Detached bungalow
Potential saving per year £250 £150 £140 £200
Installation cost* £395 £300 £285 £265
Carbon dioxide saving per year 1050 kg 620 kg 580 kg 830 kg

Loft insulation top up
(100 to 270mm)

Detached house Semi detached house Mid terrace house Detached bungalow
Potential saving per year £25 £15 £15 £20
Installation cost* £265 £220 £215 £205
Carbon dioxide saving per year 110 kg 65 kg 60 kg 95 kg

How much could you save by draught-proofing?

Draught-proofing around windows and doors could save you on average between £10 to £50 per year. Draught-free homes are comfortable at lower temperatures – so you’ll be able to turn down your thermostat. This could save you another 10% off your heating bill.


How much could you save through external wall insulation?

Building

Detached Semi detached Mid terrace Bungalow

Flat

Annual saving £460 £270 £180 £180 £150
Annual carbon dioxide saving 1,900kg 1,100kg 700kg 800kg 600kg
Installation cost* External wall insulation: £9,000 to £26,000
Internal wall insulation: £4,000 to £16,000

*Average unsubsidised professional installation costs, although these will vary.

Statistics taken from http://www.energysavingtrust.org.uk/domestic/