How can I insulate my floor?

According to the Energy Saving Trust (1) you could save up to £40 a year on heating costs if you have well insulated floors.

You can insulate your floors by either laying down new insulation, or by sealing draughts and gaps. You can use a sealant from a hardware store to seal up gaps but if you need proper under floor insulation, first you need to work out what kind of floor you have.

What type of floor insulation do I need?

There are two types of floor insulation.

  1. If your home is older you probably have suspended timber floors. These are insulated by raising the boards and placing special mineral wool or rigid foam insulation between joists.
  2. If your home is newer then it's is likely you have a ground floor made of concrete. This can be insulated when it needs to be replaced or you can lay rigid foam insulation over the concrete. Rigid foam insulation is very effective but it's worth noting that it'll raise the floor level in the room.

What are my floor insulation options?

  • Not all floors need insulation.

 You only need to insulate ground floors or floors above unheated spaces, such as a garage.

  • Add some soft furnishings. 

You can also keep heat in by laying down rugs and carpets and also sealing gaps between boards (make sure you don't seal air bricks which allow ventilation into your home).

  • Check your building regulations. 

If you are adding insulation to your floors you must check it complies with your building regulations. Make sure your installer arranges this. If you are not using an installer and choosing DIY insulation then you can contact your local Building Control Office.

  • Get a professional.

If you don't feel confident lifting floorboards yourself, always consider getting a professional in.

Do you want more inspiration on how to keep your home energy efficient?


Visit our energy efficiency pages for lots of ideas on how to save energy and money.

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