Installing Cavity wall insulation into the walls of your home, you will save up to 30% on your heating bills, improve your home comfort, add value to your property and can payback your investment in around 3 years. As well as insulating your home on the outside with external wall insulation, there is the option of insulating your home from the inside with internal wall insulation. Insulation Solutions Scotland Ltd work with several External Wall System manufacturers to ensure we provide the right system for your needs.