Cavity Wall Insulation
At Enegex, we specialise in delivering fully funded cavity wall insulation across the UK through the government’s ECO4 scheme. By insulating your walls, you can make your home warmer, slash heating bills, and reduce your carbon footprint, all at no cost if you qualify.


What is Cavity Wall Insulation?
A cavity wall is made of two layers of brick with a gap (the cavity) between them. In homes built between 1924 and 1982, these cavities were often left empty, allowing heat to escape and driving up energy bills.
Cavity wall insulation (CWI) involves filling this gap with insulating material such as mineral wool, beads, or foam, depending on the type of property. This creates a thermal barrier, trapping heat inside during winter and keeping homes cooler in summer.
How Does Cavity Wall Insulation Work?
By filling the gap in your walls, cavity wall insulation:


Benefits of Free Cavity Wall Insulation
Your insulation costs can be covered entirely by the ECO4 scheme, with no repayment, no hidden fees.
A third of heat loss happens through uninsulated walls. With cavity insulation, you could save hundreds of pounds each year.
Eliminate draughts and cold spots, and enjoy a home that stays warmer for longer.
Reducing wasted energy means lowering your carbon footprint, supporting the UK’s Net Zero 2050 goals.
Once installed, cavity wall insulation requires virtually no upkeep.
Is My Property Suitable?
You may be eligible for free cavity wall insulation if:
Our experienced surveyors will conduct a free assessment to check suitability, and if insulation is possible, we’ll guide you through the next steps.


Why Choose Enegex for Cavity Wall Insulation?
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Frequently Asked Questions
