Help & Support
Cavity wall insulation
How do I know if my home has cavity walls?
If your house was built after 1920, then it probably has cavity walls. You can check by looking at the pattern of the brick work and the thickness of the walls. Bricks in a cavity wall are laid lengthways and have a regular pattern. Speak to one of our energy advisors today on 0800 0321 894 who will arrange for a member of our team to come out to your home to check this for you.