Heatpac Employee holding injector
Heatpac employee holding pipe while insulation is pumped inside the cavity.

What is Cavity Wall Insulation?

  • Most homes built since the 1920s have cavity walls – two walls with a gap between them.
  • Cavity wall insulation fills this gap, significantly improving heat retention within your home.

Benefits of Cavity Wall Insulation

  • Save money: Reduce heating costs by up to 35%.
  • Help the environment: Reduce your carbon footprint.
  • Increase home comfort: Enjoy a warmer home all year round.

Is My Home Suitable?

Your home is likely suitable if:

  • It was built after the 1920s.
  • The external walls are in good condition.
  • The cavity is at least 50mm wide.

Free Survey: Contact us for a free, no-obligation survey to confirm suitability and assess your existing insulation.

Cavity Wall Insulation Installation

  • Professional installation: We use a registered installer for the best results.
  • Survey: We’ll assess your home’s needs and recommend the best insulation material.
  • Installation: Small holes are drilled into the external walls, and insulation is carefully injected
  • Minimal disruption: Most work is done externally, and we tidy up afterward.

Cavity Wall Insulation Extraction

  • Upgrade your insulation: We offer safe removal of old cavity wall insulation to make way for newer, more effective materials.
  • Cost considerations: Please contact us for a quote, as prices vary based on factors like existing materials and building access.

Frequently Asked Questions

  • How much does it cost?
    We provide free surveys and accurate quotes tailored to your home.
  • Will it save me money?
    Yes, the Energy Saving Trust estimates savings of over £280 per year for the average semi-detached home.
  • What insulation do you use?
    Knauf Earthwool or Thermabead/Polybead, depending on your needs.
  • Do you offer grants?
    We can help you find available grants like ECO4 or GBIS.
  • Is the work guaranteed?
    You have the option to apply for a 25-year guarantee from the Cavity Insulation Guarantee Agency (CIGA).

Get in Touch

For free advice, surveys, and installation:

Let’s make your home warmer and more energy-efficient!