20mm Kingspan Kooltherm K5 External Wall Insulation Board ( Pack of 18 )

Kooltherm K5 stands out as a high-end external wall insulation board designed specifically for masonry walls. Boasting an impressive thermal conductivity of just 0.021 W/mK, it enables the creation of remarkably thin wall structures. These boards are perfectly suited for installation behind both traditional and lightweight polymer modified renders. What's more, they offer the added convenience of external retrofitting for existing properties, ensuring minimal disruption to occupants as all the work takes place from the outside.