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INTERNAL WALL INSULATION

Specialist Internal Wall Insulation Installers

Internal Wall Insulation (IWI) is an extremely effective means of insulating solid wall properties to significantly reduce the amount of heat lost through the walls.

The installation process involves fixing a layer of insulation material to the internal walls of a property, finished with plasterboard to leave a smooth and clean surface for redecoration. Decoration and the movement of fixtures and fittings are generally included within the installation package.

Cornerstone specialises in the insulation of solid wall properties and has internally insulated countless domestic properties all over the UK, including private and social housing, as an alternative solution to External Wall Insulation (EWI).

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THE BENEFITS OF INTERNAL WALL INSULATION

Uninsulated solid walls can leak up to 45% of a property’s heat – insulating these walls can save up to £425 per year on your energy bills.* Solid walls can be insulated internally or externally, with the cost depending on the property size and condition. Internal Wall Insulation (IWI) offers a number of benefits:

Creates a warmer and more comfortable home

Significantly lowers your energy bills

Improves the appearance of your property

Can be carried out on a room-by-room basis

Prevents condensation and mould growth

Increases the value of your property

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IS MY HOME SUITABLE FOR IWI?

If your home was built before 1920, it will most likely have solid external walls with no cavity. The lack of a cavity means more heat can escape from your house through the walls.

Internal wall insulation is applied to the internal face of a property’s external walls and can often be the single biggest home improvement you can make to reduce heat loss. The insulation makes it much more difficult for the heat to pass through your walls, keeping as much of it as possible inside your home for as long as possible.

You should be able to tell which wall type you have by looking at the brickwork on the outside of your house. If your home has solid walls, you will be able to see a pattern showing the long and short side of the bricks like Fig A.

If your home has cavity walls, you will only be able to see the long side of the bricks like Fig B.

IWI is suitable for all properties but is most often installed in homes where External Wall Insulation (IWI) is not appropriate, such as listed buildings or those located in a conservation area. While IWI may impact internal living space and be more disruptive throughout installation, it is often cheaper, quicker and less complex to install than EWI and won’t require planning permission.

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Depending on your households circumstances, funding could be available to contribute towards the cost of IWI.

POTENTIAL SAVINGS

The cost of IWI varies between properties, from around £4,000 to £12,000 depending the on the size and condition of a property.

Detached

Approximate Annual Energy Bill Savings*
Save around £425

*Figures from the Energy Saving Trust, based on insulating a gas-heated home
Semi-Detached

Approximate Annual Energy Bill Savings*
Save around £255

*Figures from the Energy Saving Trust, based on insulating a gas-heated home
Mid-Terrace

Approximate Annual Energy Bill Savings*
Save around £160

*Figures from the Energy Saving Trust, based on insulating a gas-heated home
Bungalow

Approximate Annual Energy Bill Savings*
Save around £175

*Figures from the Energy Saving Trust, based on insulating a gas-heated home