CAVITY WALL INSULATION

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Specialist Cavity Wall Insulation Installers

Cavity wall properties have outside walls that are made up of two layers with a gap or cavity in between.

Cavity Wall Insulation (CWI) is a product that is inserted between the two layers of wall to help keep the heat in. Up to a third of household heat can be lost through the walls so insulating them is an excellent way of reducing costs and conserving heat.

Cornerstone has installed CWI in thousands of domestic properties, including private and social housing, across the UK.

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THE BENEFITS OF CAVITY WALL INSULATION

If your property has uninsulated cavity walls, around one third of the heat from your home will escape through the walls. CWI is a clean, inexpensive and effective means of insulating your property and has a number of benefits:

Save up to £225 on your energy bills every year*

Reduce damp and condensation in your home

Reduce heat loss by around one third

Make your home warmer and more comfortable

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IS MY HOME SUITABLE FOR CAVITY WALL INSULATION?

If your home was built after 1920 it is likely that you have cavity walls; properties built in the 1990s or later generally have insulation already installed. 

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 cavity walls, you will only be able to see the long side of the bricks like Fig A.

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 B.

A cavity wall property will generally be suitable for CWI if the cavity is currently unfilled, at least 50mm wide and the brickwork is in a good condition.  It is not recommended for walls that are exposed to driving rain, and any issues with damp in the property should be resolved before the CWI is installed.

WHAT IS THE CWI INSTALLATION PROCESS?

Cavity Wall Insulation is not a measure you can install yourself - it must be carried out by a registered installer.  They will require access to all parts of the external walls of the property.

A pre-installation survey will involve a boroscope inspection, where the surveyor will drill a small hole in the wall to check that the cavity is hollow and suitable for CWI.

Once approved, the installation process involved drilling small holes at metre intervals across the external walls of the property, through to the cavity space.  Specialised equipment is then used to ‘blow’ the insulation through these holes into the cavity.  Once the whole wall has been filled, the holes will be filled so that they are barely noticeable.

The whole process usually takes about two hours for an average sized house with good access.

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Cornerstone has insulated more than 1,000 cavity wall properties to date

POTENTIAL SAVINGS

The cost of CWI varies between properties, from around £350 to £850, depending the on the size and condition of a property. The measure will usually pay for itself within five years.

Detached

Approximate Annual Energy Bill Savings*
Save around £225

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

Approximate Annual Energy Bill Savings*
Save around £150

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

Approximate Annual Energy Bill Savings*
Save around £150

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

Approximate Annual Energy Bill Savings*
Save around £95

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

Depending on your households circumstances, funding could be available to contribute towards the cost of CWI.  Finance options are also available.

WHAT OUR CUSTOMERS SAY...

"I would just like to say how pleased we are with the work from start to finish, everyone has been very friendly and helpful – thank you."

Mrs A, Home Owner, Carlton Colville, Lowestoft

“Cornerstone have impeccably high delivery standards, they are quality driven in both their workmanship and tenant liaison and we would happily use them again on future projects."

Les Lazzell, Project Manager, South Cambridgeshire District Council

“We have a great relationship - they undertake whatever is necessary to complete the contract on time, budget and to the quality levels required. I would highly recommend Cornerstone.”

Jason MacCormick, Project Manager, Saffron Housing

Areas serviced: Norfolk,  Suffolk, East Anglia, Essex, Cambridgeshire, London, Sussex, Brighton

01379 853 613

enquiries@cornerstonelimited.co.uk
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Registered Office: Cornerstone (East Anglia) Limited, Unit 2-4, Fuller Road, Harleston, Norfolk, IP20 9EA.
Registered No.05117129. Registered in England and Wales.