Cavity Wall Insulation

Cavity Wall Insulation

Cavity wall insulation is used to reduce heat loss from homes by filling the air space between walls and preventing the transfer of heat, keeping your home warm in the winter and cool in the summer.

Our trained installers will come and conduct a survey of your home for free and calculate your possible savings.

What is Cavity Wall Insulation?

It is estimated that 35% of all heat loss from an uninsulated home is through the walls. This makes cavity wall insulation one of the most cost-effective solutions you can take to start saving money on those heating bills.

How does it work?

Most homes built after the 1930’s are built with two exterior walls with an unfilled cavity in between. By filling this empty cavity with wool insulation the warmth from the home is prevented from passing through, acting like a blanket and bouncing it back into the house.

How Heat Insulation WorksIn this same way, it can help to keep your home cool in the summer by stopping the heat from outside transferring into your home.

Installation Process

To insulate your cavity walls, we drill small holes up to 26mm in diameter at intervals of around 1m on the outside wall of your home in a specific drill pattern. With specially designed equipment, we then blow insulation into the cavity. Once all the insulation is in, we fill the holes in the mortar joint, so you’ll barely notice them. You will also receive a 25-year CIGA Guarantee.

Filling cavity walls is not a job you can do yourself: you need to be a registered installer. We can do the job in around two hours for an average house with easily accessible walls; it is simple and quick.

At the end of the installation, Heat Insulation Ltd will apply for your independent 25 years C.I.G.A. Guarantee to ensure, in the unlikely event of a problem, any issues will be rectified quickly and easily.

Can I Benefit from Cavity Wall Insulation?

If your home was built after 1930, the chances are that its external walls are made of two layers with a gap or cavity between them. Cavity wall insulation fills that gap, keeping the warmth in to save energy.

Your home will usually be suitable for cavity wall insulation if:

  • Its external walls are unfilled cavity walls
  • Your cavity is at least 40mm wide
  • The masonry or brickwork of your property is in good condition
  • It is more than ten years old (most newer houses will have insulation already).

Are my Walls Suitable for Cavity Wall Insulation?

The type of insulation you need depends on whether you have a cavity or solid wall. If your home was built after the 1930’s it is likely to have cavity walls.

The good news is it’s easy to tell based on the pattern of your bricks. If your bricks have an alternate pattern of long and short bricks your wall is likely solid and therefore no available for insulation. However, if it has an even brick pattern it is likely to have a cavity.

How to tell if my walls are already insulated?

Brick PatternsIf you struggle to heat your home despite high heating bills, this is a good sign your walls are not insulated. However, if you want a more scientific method you can always use a thermal imaging camera.

It is always best to call on professional services to establish your insulation requirements. If you decide to go ahead with it this is not something you can do yourself so need to get accredited installers to carry out the process from survey to completion or you cannot access any grants or guarantees.

If you have any damp patches on your internal walls, then they should not be insulated until the problem is sorted out. You should speak to a builder who specialises in damp prevention.


The Benefits of Cavity Wall Insulation

Will it cost me?

With current government and local schemes, funding is available for those claiming benefits. If you fit the funding criteria then you wont have to pay a penny for your cavity wall insulation.

If you are a landlord, own or privately rent your property apply for a free survey from our trained installers.

Finance and one time payment options are available for those who don’t meet funding criteria.

How Much Will I Save?

You could save up to £250 a year on heating bills alone, giving you a payback within just 5 years. Include the benefits of a comfortable home and the impact on the environment cavity wall insulation becomes an easy choice.

Impact on the Environment

The UK’s 21 Million domestic dwellings are responsible for as much as 27% of the countries CO2 emissions. With as much as 35% of the energy being saved through cavity wall insulation on the average house, the right insulation could have a huge impact on UK carbon emissions.

All new builds are being built with cavity wall insulation as standard, showing the commitment the industry is giving to this energy-saving measure.

Cavity wall insulation is not just good for the bank balance it also plays a big part in reducing our carbon footprint.

Frequently Asked Questions

For more information on cavity wall insulation see our FAQ guide.