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Cavity Wall Insulation

Insulation in your cavity walls is one of the easiest and cheapest ways to reduce your utility bills. While houses built from the 1990s onwards will already have this, there are a lot of properties before then which will have not been insulated. 

Why have Cavity Wall Insulation installed?

What is Cavity Wall Insulation?

A cavity wall is a pair of walls with a gap in-between. These are found on houses generally built in the 1960s onwards.  The insulation that we use is called "thermabead", small beads that are inserted into the cavity under high pressure to maintain heat within a home.

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How does it work?

Small holes are drilled into the outside layer of a cavity wall.


This allows a tube to be inserted and the insulation is blown inside. This insulation, thermabead, fills all the cracks to make sure that there is no place left in the cavity.​

Frequently Asked Questions

Does it cause damp?

No- when installed correctly, cavity wall insulation does not cause damp issues. To make sure this doesn't happen, we ensure that sufficient ventilation is installed. 

How long does cavity wall insulation last?

The life expectancy of the insulation is 25 years. However, there are many examples of where the insulation has lasted longer than this.

Are we able to replace cavity wall insulation?

We are able to replace cavity wall insulation if the cavity is fully empty. When we do a survey of the property, we will check to see if there is any insulation in the wall. We are not able to provide a cavity extraction service.

How do I qualify?

You will qualify if you are on are in receipt of one of the following benefits:

  • Universal Credit 

  • Child Tax Credit

  • Working Tax Credit

  • Pension Credit Guarantee

  • Pension Credit Savings Credit

  • Income-Based Job Seekers Allowance 

  • Income Related Employment and Support Allowance 

  • Income Support 

  • Housing Benefit

  • Child Benefit (Under an income threshold)


If you have a gross household income under £31,000.

No. of Parents
1 Child
2 Children
3 Children
4 Children
Two Parents
Single Parent

Why Choose Broad Oak?

We are fully accredited installers with MCS and have been installing loft insulation for over 10 years.

We are a family-run, local business. We have grown into one of the largest heating installers in the country.

We offer a consultation and a survey free of charge. We'll advise on the best products and systems for your home.

We'll only take a couple of hours to get the job done- straight in, straight out! No fuss!

If you have a loft conversion, we'll be able to do that too! Learn more here.

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Sounds good?
Get in touch with us now:

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