Cavity Wall Insulation

What is Cavity wall?

Cavity walls consist of two ‘skins’ separated by a hollow space. The walls are commonly brick or concrete block. This typical cavity wall construction was introduced in the UK from around the 1930’s and by the 1990’s cavity insulation became compulsory in the UK building regulations. so knowing the age of your home is the first useful step in figuring out if you have them. If your home was built after 1930 then it’s highly likely you have cavity walls.


Another useful trick is to look at the pattern of your house bricks. A regular pattern of bricks – where all the bricks are laid on the long side – usually means you have cavity walls.

• House stock pre 1930 – solid wall construction.
• House stock post 1930 – Cavity walls slowly introduced.
• 1970 onwards – Possible chance of insulated cavity.
• 1990 onwards – Compulsory cavity insulation as per building regulations.


How Cavity Wall Insulation Installed


Firstly an experienced Elite Impact surveyor will visit your property to survey and confirm that it is suitable i.e. in good condition, has wall cavities that can be filled and that your property is not in an area designated as suffering from windblown rain.

To insulate your cavity walls, our experienced accredited contractor or approved installer will drill small holes around 22mm in size at regular intervals (around 1m) on outer walls through the mortar joint between the bricks. Using specially designed equipment, they then blow insulation into the cavity. The installer will make sure that an even pattern is used across the face of the wall and that the highest hole is no more than 30cm from the top of the bricks. This ensures that the cavity is filled evenly from the bottom to the very top. Once all the insulation is in, team fills the holes in the brickwork and make sure the end result is invisible.

Cavity wall insulation can be made out of three types of materials:

• Mineral Wool

• Beads

• Foamed Insulants


All three are manufactured according to the British standards.

Benefits Of Cavity Wall Insulation

  • Typically 35% of heat loss from a house escapes through uninsulated cavity walls. This can be reduced to around 10% by having it installed.

  • Cavity wall insulation is one of the most cost effective energy saving measure that most people can carry out on their homes.

  • By insulating your cavity walls it will not only keep you warm but it can also help reduce the down draughts created from the outside wall, and also helping out with condensation and damp Problems.

  • On average you will save upto £260 per year on your energy bills and reduce the carbon emission (CO2) by 660 kg/ year.

  • Increase the Energy Performance Certificate (EPC) rating of your property. 

  • Add real financial value to property and turn your home into Energy Efficient home.


Cost & Guarantee

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Elite Impact Business Solutions will always survey a house before we get it installed from our accredited contractor. The no obligation survey and quotation is free and we will maximise any available funding support to ensure that any charges are kept as low as possible. In many cases there will be no charge for the work such as under ECO Grant.

All Elite Impact’s cavity wall insulation installations come with the Cavity Insulation Guarantee Agency (CIGA). CIGA provides independent 25-year guarantees for Cavity Wall Insulation fitted by registered installers in the UK. The standard Guarantee covers a traditionally constructed residential property.