Install loft insulation

Insulating your loft can be a very quick and cheap way to improve the comfort and energy efficiency of your home.


In an average British home about 26%* of heat is lost through the roof. Installing loft insulation will substantially cut this heat loss, making the rooms below more comfortable and easier to heat. Loft insulation is effective for at least 40 years and it will pay for itself many times over.


There are two main ways to insulate a loft:

  1. Insulating between the joints on the floor of the attic
  2. Insulating the area between and over the rafters

It is quick and relatively cheap to insulate the floor of your attic and can be done yourself if your loft is easy to access. If there is no damp or condensation you can also use the attic for storage by placing boards over the insulation. It does cost more to insulate the roof between the rafters but when done by trained installers it will help your home retain heat and make the attic more comfortable a space.

For a typical semi-detached home, the cost for loft insulation is roughly £300, but the annual saving might be £135. This makes it one of the most cost effective measures in an uninsulated house. Even if your loft has already been equipped with some insulation, it is still worth adding more if it is less than 200mm (8 inches) thick.

The Energy Saving Trust and Simple Energy Advice have more information on their websites.

Certain households might be entitled to support under the Energy Company Obligation (ECO). Under this scheme medium and larger energy suppliers may fund the installation of certain energy efficiency measures. Find out more information about the scheme and if you are eligible via Ofgem.

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