Underfloor Insulation

With inadequate or no underfloor insulation, your home will be suffering 15% heat loss

Feel the benefits for years

We're delighted to now offer Free* Floor Insulation helping you save hundreds on your energy bills

Underfloor Insulation (UFI)

Insulating under floorboards on the ground floor will save you about £60 a year, older homes are more likely to have suspended timber floors.

Timber floors can be insulated by lifting the floorboards and laying mineral wool insulation supported by netting between the joists.


You don't need to insulate the floors of upstairs rooms in your house if they're above heated spaces, like your living room.

You should consider insulating any floors that are above unheated spaces, as you could be losing a lot of heat through those.
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How to tell what type of floor I have?

If you have a basement or cellar underneath your house that you can get into safely, take a look down there.

If the floor is a suspended wooden floor, you will probably be able to see wooden joists and the undersides of the floorboards.

If you have air bricks or ventilation bricks on the outside wall(s) of your house that is below floor level, you probably have a suspended timber floor, never block them up, they are needed to help ventilate under your floor and stop your floorboards rotting.

If you don't have access to space underneath your house, you will need to lift a corner of the carpet and underlay to have a look.

Is floor insulation messy to install?

It's easy to insulate your timber floor if you have an unheated cellar or basement space underneath that you can get into. Check that the joists supporting the floorboards are in good condition and don't show any signs of wet or dry rot.

If the joists are okay, we can fit insulation in between them and hold it in place with netting if necessary.