External Wall Insulation (EWI) is a system that wraps the outside of your home in a layer of insulation board, finished with a render or coating. It's one of the most effective ways to improve the thermal performance of a property — reducing heat loss, cutting energy bills, and making your home significantly more comfortable throughout the year.

If you're considering having your home rendered, one of the first decisions you'll face is choosing the right system. Two of the most common options are silicone render and traditional sand & cement render — and while both can transform the look of a property, they work very differently and suit different homes and budgets.