What is PIR Insulation?

Definition

PIR insulation (Polyisocyanurate insulation) is a rigid foam board widely used in walls, roofs, and floors. It consists of polyol and isocyanate, forming a closed-cell structure that offers high thermal performance in a thin profile. PIR boards are lightweight, durable, and versatile, making them suitable for a variety of applications.

Benefits

• High Thermal Efficiency: Lambda values of 0.020–0.022 W/mK provide excellent insulation with minimal thickness.
• Versatile Applications: Suitable for walls, floors, pitched and flat roofs, drylining, and soffits.
• Fire Performance: Euroclass C–s2,d0 or B–s1,d0 depending on the product.
• Sustainability Options: Halogen-free, low VOC, bio-enhanced PIR, and EPD-certified products available.
  
  

Applications

• Full-fill cavity walls: ECO/CT boards
• Partial-fill cavity walls: ECO/CW boards
• Warm roofs: ECO/MA and XtroLiner boards
• Drylining and internal wall insulation: Safe-R and Thin-R boards
• Flat roofs: FR/ALU and FR/MG boards
• Soffits and framing: Safe-R Framing boards
  
  

Best Practice Tips

• Select boards based on required U-value, thickness, and fire rating.
• Ensure tight joints to minimise thermal bridging.
• Use VCL membranes where moisture control is needed.