Below are estimates of the costs and payback from taking some of the measures featured on our web-site. Costs and payback figures are all approximate, and will vary from house to house. Estimates come from the Energy Saving Trust apart from those marked with an asterisk*
Measure |
Annual saving (£/yr) |
Installed Cost
|
Installed payback |
DIY cost |
DIY payback |
CO2 saving per year (up to) |
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|
Loft insulation (0-270mm) |
£180-£220 |
£199 to £249 * |
1 year |
From £275 |
Around 18 months |
1.5 tonnes |
|
|
Cavity wall insulation |
£130-£160 |
£189 to £249* |
Under 2 years |
- | - |
1 tonne |
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|
Hot water tank jacket |
Approx. £20 |
From £5 |
From 4 months |
From £10 |
From 6 months |
150kg |
|
|
Primary pipe work insulation |
Approx. £10 |
- | - |
£5-£10 |
Up to 1 year |
65kg |
|
|
Filling gaps between floor and |
£10-£20 |
- | - |
Around £20 |
Up to 1 year |
120kg |
|
|
Draught proofing |
Approx. £20 |
From £75 |
Around 4 years |
From £50 |
3-5 years |
145kg |
|
|
Internal wall insulation |
£270-£340 |
From £40/m2 |
- | - | - |
2.25 tonnes |
|
|
Loft insulation (50-270mm) |
£50-£60 |
Around £240 |
4-5 years |
From £200 |
3-4 years |
410kg |
|
|
External wall insulation |
£290-£350 |
From £1800 |
5-6 years |
- | - |
2.4 tonnes |
|
|
Floor insulation |
£40-£50 |
- | - |
From £100 |
From 2 years |
340kg |
|
|
Double glazing |
£80-£100 |
- | - | - | - |
680kg |
