The 40mm Celotex TB4040 PIR Insulation Board is a high-performance solution designed to reduce heat loss and minimise thermal bridging in walls, floors, roofs, and refurbishment projects. Made from premium PIR rigid foam, it delivers excellent insulation efficiency with a low thermal conductivity of 0.022 W/mK. Each lightweight board offers 2.88m² coverage, making installation fast, clean, and cost-effective for both professional contractors and homeowners.

Features

• High-performance PIR rigid insulation
• Board size: 2400mm x 1200mm
• Thickness: 40mm
• Low thermal conductivity: 0.022 W/mK
• Lightweight at 4.06kg for easy installation
• Coverage per board: 2.88m²
• Celotex TB4040 specification
• Suitable for walls, floors, roofs, lofts, and bridging cold spots
• Ideal for new builds, upgrades, and refurbishment projects

Ideal For

• Improving thermal performance in residential and commercial buildings
• Reducing thermal bridging around junctions and structural points
• Wall, floor, loft, and pitched roof insulation
• Installers needing a balance of thickness and strong thermal output
• Projects requiring a dependable mid-thickness PIR insulation board

What makes the Celotex TB4040 board effective for reducing heat loss?
Its PIR core delivers low thermal conductivity at just 0.022 W/mK, helping limit heat transfer through walls, floors, and roofs while improving overall energy efficiency.