Costs of insulation table

Ways of insulating and draught proofing your home
MeasureAnnual savingInstalled costPayback 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

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