The Unilin Thin-R Cavity Wall Insulation PIR Board 1200 x 450 x 50mm is a high-quality insulation product designed to deliver top-notch thermal performance. This board is constructed from PIR (polyisocyanurate), known for its excellent insulative properties. With its dimensions of 1200mm by 450mm and a thickness of 50mm, its ideal for use in cavity walls to prevent heat loss and maintain a comfortable indoor temperature. Its lightweight, easy to handle, and can be installed quickly and efficiently, making it a practical choice for both professional builders and DIY enthusiasts.