Cavity Wall Insulation

Cavity Wall Insulation is one of the most common methods of insulating the home. Since 1985 cavity walls were commonly insulated when the house was built, however any homes built before this date may have partially insulated or uninsulated cavities. This means that up to 35% of the heat in your home is being lost through your walls.

It is a relatively quick and free* measure to install, meaning it has a very quick payback time (the time it takes for the savings in your energy bills to effectively pay for the measure itself).

*subject to funding availability

Bonded Bead Insulation

For cavity wall installations, Thrift Energy uses an oil-based, waterproof polystyrene bead, which is bonded with a glue when being injected into the cavity. This creates a material that is solid, yet has gaps for any water that may get into the cavity to drain down to the bottom of the cavity as was intended, rather than being transferred across to the internal walls. We have completed thousands of cavity wall installations with our bonded bead without any complaints of damp.

All of our installations come with a 25 year, insurance-backed guarantee.

With around 35% of all heat loss occurring through the walls, a properly insulated cavity can save an average house up to £210 a year!

How It Works

  • Make your enquiry by filling in our enquiry form or calling 0800 689 3415
  • One of our team will arrange a time for one of our energy efficiency experts to come and complete a home survey
  • Once completed, if your home is suitable then we can arrange a time for an installation time to come and install the cavity wall insulation
  • On the day of installation, the team will arrive, and they will begin the process by drilling carefully selected holes into the cavity, through which they will inject the bonded bead
  • Upon finishing, the drill holes are carefully repaired
  • Following installation, your 25 year, insurance-backed warranty will arrive in the post
  • Enjoy your toasty home and start saving money!

Why Choose Thrift?

A fully qualified surveyor will come to your home and complete a whole house assessment. This means they will assess the suitability of your home for cavity wall insulation, explain the process to you, and if appropriate, arrange a date and time for your installation.

Not all homes are suitable...

It’s important to ensure you get a reputable, experienced company in to complete a full survey of your home before you have any action taken because not all home are suitable to have cavity wall insulation installed.

Enquiry Form

Enquiry Form

Use our simple interactive form to see whether you could be eligible for energy efficiency home improvements for free, just answer a few quick questions!

Property Type


Number of External Walls

Number of Bedrooms

Heating System

Heating Type

Measure Required

You may select multiple answers on this section.

Great news - it looks as though you may be eligible for some funding towards energy efficiency measures - fill in your details here and someone will contact you for more information.