CAVITY WALL INSULATION Cavity wall insulation is a specific insulation technique used to reduce heat loss though a cavity wall by filling the air space with porous material. This immobilises the air within the cavity, preventing convection. Air movement inside walls causes heat loss, but cavity wall insulation can easily solve this problem.

If your house was built after 1920, it is likely that its external walls are made of two layers with a gap or cavity between them. Cavity wall insulation fills that gap, keeping the warmth in to save energy. It can also help reduce condensation inside the house if this is a problem on your external walls.

Cavity wall insulation can help you to save money. If you live - for example - into a gas-heated semi-detached house with three bedrooms, cavity wall insulation can provide you an annual saving up to £ 135 on your heating bill. Is cavity wall insulation suitable for your home? Your home can have cavity wall insulation service if its external walls are unfilled and they present a cavity at least 50 mm wide. The masonry and the brickworks of your property have to be in good condition to allow cavity wall insulation.

Maybe you are not sure if cavity in your external walls are filled or unfilled. An installer of our team can provide you a boroscope inspection. This service consists on drilling a small hole in your external walls to see if your walls are hollow or filled.

To insulate your cavity walls, our installer will drill small holes around 22 mm in size at intervals of around 1 m in the outside walls of you house. Then with specially designed equipment he will blow insulation material into the cavity. Our professional installers can do cavity wall insulation service in only two hours for an average house with easily accessible walls. If your external walls are joined to another house cavity wall insulation in possible as well: our installer will insert a cavity barrier to contain the insulation.

Eagle Property service, with all its installers, is signed up to The National Insulation Association (NIA). The Cavity Insulation Guarantee Agency (CIGA) guarantees our cavity wall insulation for 25 years.

Please see our other available services listed below:

Gas Safety Certificate

Inventory Services

Commercial EPCs

Floor Plans


Portable Appliance Testing (PAT)

Electrical Safety Certificates

Cavity Wall Insulation

Loft Insulation.