On average, half of all heat lost in homes escapes through the loft space and walls. You’ve probably got some insulation already, but is there enough? – probably not! Standard insulation must be at least 27cm (10”) thick to be effective, where loft floor boarding doesn’t allow this thickness in the space beneath, a thinner multi-foil product can be used to achieve the same level of insulation. On average, you could save £200 per year by insulating your loft to these standards.
So before you get carried away with plans to install your own mini wind-turbine, do the maths and check the loft first.