Cavity Wall Insulation The Positives and Negatives
![cavity wall wool insulation](https://www.housingtriage.com/wp-content/uploads/2021/07/contractor-worker-with-roll-of-mineral-wool-insula-84X4JUQ-1024x680-1.jpeg)
What is Cavity Wall Insulation? Cavity Wall Insulation (CWI) is the process of filling the ‘gap’ or cavity between two layers of brickwork with an insulative material, sometimes a foam board or sometimes a material made up of beads is injected into the wall. The material used depends on whether the building was built with […]