PIR Insulation

About

PIR Insulation Boards PIR (Polyisocyanurate) insulation is one of the highest-performing rigid insulation materials available, widely used across the construction industry for roofs, walls, and floors. Its exceptional thermal resistance means you can achieve low U-values with thinner boards — ideal for projects where build-up depth is limited. What is PIR Insulation? PIR boards are manufactured from a closed-cell rigid foam, typically faced on both sides with a reflective foil or glass tissue facing. This construction gives PIR boards excellent thermal performance, low moisture absorption, and good compressive strength. They are lightweight, easy to cut on-site, and compatible with most standard construction methods. Applications for PIR Insulation Boards PIR insulation is suitable for a wide range of applications, including: Flat roofs — warm roof and cold roof build-ups Pitched roofs — between and below rafter systems Solid and cavity walls — internal and external insulation Floors — below screed and above joist installations Leading PIR Insulation Brands We stock PIR insulation from the UK's most trusted manufacturers, including Celotex , Kingspan , and Recticel . All products are available in a range of thicknesses to suit your specification, with next-day delivery available across mainland UK.