Cavity Wall Insulation Grants

What is Cavity Wall Insulation?

Cavity wall insulation is a simple and highly effective way to prevent heat loss from your home. It involves filling the gap between your external walls with insulating material, helping you keep your home warmer for longer, and cutting energy bills in the process.

Through the ECO4 and GBIS government schemes, eligible homeowners can get cavity wall insulation completely free of charge. It’s ideal for homes built after 1920 with unfilled cavity walls and poor energy performance.

Cavity wall insulation is perfect for reducing heat loss, lowering fuel bills, and improving comfort, especially in the colder months.

  • Stops up to 35% of heat loss through walls
  • Quick installation by certified professionals
  • Free for eligible homeowners under ECO4 or GBIS

Is Cavity Wall Insulation Right for My Home?

Cavity wall insulation is ideal for most homes built after the 1920s, when double brick walls with a gap (cavity) became standard. If your property has unfilled cavity walls and a poor energy rating, you’re likely to benefit significantly.

Here’s when cavity wall insulation is most suitable:

  • Your external walls are made of brick (not stone or solid wall)
  • Your home was built between 1920 and 2005
  • You have little or no insulation already
  • You notice cold draughts or high heating bills
  • Your EPC rating is D, E, F, or G

Not sure if your walls are suitable? Our team will carry out a free survey to check your home’s cavity type, condition, and eligibility.

Benefits of Cavity Wall Insulation

Cavity wall insulation is one of the most cost-effective ways to make your home warmer and more energy efficient. By filling the gap between your external walls, it helps trap heat inside and cut down on fuel usage.

Lower Energy Bills

Insulating your cavity walls helps reduce heating costs by up to 35% — saving you hundreds each year.

 

Warmer, More Comfortable

Enjoy a more stable indoor temperature during winter without constantly turning up the thermostat.

 

Reduced Carbon Emissions

Lower energy use means a smaller carbon footprint — making your home more eco-friendly.

 
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