Action Surrey: Surrey's Low Carbon Community

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Insulation: Floor

Insulating underneath your floor on the ground floor can save you about from about £25 to £70* in a detached house per year!

Ground floors before 1989 did not require any insulation when they were being built, since 2006 Building Regulations have stated that ground floors in new buildings must be thermally insulation. Adding insulation to your floor can be done but may be more complex if you have solid concrete flooring.

A simple and cheap way to keep heat within your property is by laying down rugs and carperts. This keeps warm air in and is a cheaper alternative to floor insulation. 

Suspended timber floorboards

Before you start thinking of ripping up floorboards, it may be beneficial to draughtproof the floors instead. Timber floorboards often have gaps in-between them which can cause draughts, letting warm air escape. These can be filled with draughtproof sealants. 

If you would like to insulate your suspended timber floor then insulating them will typically cost between £300 and £750 depending on how easy it is to get the floor boards up.

Solid concrete floors

Solid concrete floors can only be insulated from above, the simple way to insulate them by laying a "floating floor" on top. The new floating floor is not actually fixed to the original floor, but simply placed on top. This form of insulate will require doors and skirting boards to be elevated, as the new floor will be higher than the original.

The cost and level of disruption for solid concrete floor insulation can be higher, and we would usually only recommend this during other major refurbishment works.

How much could you save?

England, Scotland and Wales

 DetachedSemi-detachedMid terraceBungalow

Fuel bill savings per year





Carbon dioxide savings (kgCO2/year)

280 kg

160 kg

110 kg

250 kg

More information about draughtproofing?

Download the information leaflet below to learn more about draughtproofing your home.

Draughtproofing Advice

For more information contact Action Surrey on 0800 783 2503 or email

Alternatively, fill out our enquiry form online to obtain a survey and no-obligation quote.

Make an enquiry

*All figures are taken from the Energy Saving Trust April 2019 figures