What is solid wall insulation?
Most of our homes in the UK are generally built with solid walls or cavity walls. Most properties which were built before the 1920’s usually have solid external walls. Solid walls do not have a gap (cavity) so they cannot be filled with cavity wall insulation. Cavity walls are made of two separate layers with a gap in between, hence the name ‘cavity’. Solid walls therefore have to be insulated from the inside (internal) or from the outside (external). The initial cost of insu
