Insulation Types

Whichever type you decide to install, plan to lay at least 4in (100mm) of insulation. If you put down a thicker layer you will prevent more heat loss but the savings are proportionately less.

You may be able to reduce the cost if you buy insulation material in the summer when there is less demand for it and there are often special offers. You may also be eligible for a grant so that you can reclaim some of the money you spend. Contact your local council or Citizens Advice Bureau for details.

Before you buy, find out whether your supplier will deliver the insulation. Blanket rolls and sacks of loose-fill are very bulky for their weight. Even a car with a hatchback will only hold about a quarter of the amount you need to insulate the average loft.

You can insulate a loft yourself with blanket, loose-fill or sheet insulation. Alternatively, you can pay a specialist company to blow loose-fill insulation between the joists. The advantage with blowing is that the insulation can be directed into areas close to the eaves which are otherwise difficult to reach.

In addition to the more usual DIY loose-fill types of insulation, companies use other specialist materials.