Research has shown that 35% of a building's energy can be lost through external walls, even more if the wall is weathered or cracked - a fact that most people never consider. An External Wall Insulation (EWI) render system will cover your building with a waterproof barrier, one that will give you all-year-round protection, helping to keep your precious energy inside. Due to it being a through colour product, it also requires no maintenance. A typical insulated render system includes the attachment of insulation boards to the existing substrate using mechanical fixings, sometimes accompanied by adhesive.