Thanks to MoneySavingExpert!
Get three rolls of DIY loft insulation for £3 at B&Q this weekend only, from Fri 27 - Mon 30 Aug.
The insulation is glass wool and approximately 200mm thick. B&Q says it has over 20,000 rolls available at this price. Not only is loft insulation good for the environment but it can cut your energy bills by about £150/year too.
The offer's in store only in the majority of B&Q branches nationwide.
How many rolls do you need?
B&Q has a nifty online calculator which will tell you how many rolls you need based on the square foot area of your loft.
According to the Energy Saving Trust 270mm is the recommended depth for wool insulation to get the maximum amount of heat insulation, though other materials differ. More info at the Energy Savings Trust.
Free loft insulation?
Anyone aged over 70, plus others in receipt of certain benefits, can get grants to help pay loft insulation costs, or even get it for free. Full details in the Energy Grants Guide.