Drag the methods of insulation to the correct box in the table.
Method of insulation | Mean cost (£) | Payback time | Savings per year (£) |
---|---|---|---|
Loft insulation | 100 | 2 years | |
Double glazing | 2500 | 25 | |
Draught excluders | 25 | 62.5 | |
Cavity wall insulation | 450 | 10 years |