A cavity wall usually consists of two leafs of bricks or blocks with a space between them. If your home was built before the mid-1980s with cavity walls it may not contain insulation. More recent cavity walls may have some, but it may not be sufficient, and could be improved upon.
How does it work?
If you have cavity walls we can inject insulation to fill the cavity. Holes are drilled on the outside of the wall to inject the insulation. These are then filled and matched to the walls existing finish after the work is completed.
Houses with solid walls or hollow block walls cannot be insulated with cavity fill insulation. You may wish to consider internal or external insulation instead.