What is Cavity Wall Insulation?
Cavity wall insulation is injected into the cavity between the inner and outer leaves of brickwork that make up the external wall of your property. An installer will do this from the outside of your property. There are a variety of different insulating materials, but they all work in the same way: by combining with the still captive air, the insulation acts as a barrier to heat loss. Please note, in a few instances (such as for timber frame and system built dwellings e.g. steel frame) cavity wall insulation is not appropriate, please contact a CIGA registered installer for more information if you are in any doubt. How do I know if I have cavity walls? First of all, check the age of your house. In most houses built after the 1920s, the external walls are made of two layers with a small air gap or ‘cavity’ between them. Also, check the thickness of the walls by any entrance door or window. Cavity walls are at least 26.5cm (10.5 inches) thick. Looking at the brick pattern of your outside
