40mm Insulation Boards

Shop 40mm insulation boards at trade prices: 40mm PIR from Kingspan, Celotex (now Sopratherm) and Recticel, 40mm Kingspan GreenGuard GG300 XPS, and 40mm Kingspan Kooltherm K103 phenolic floorboard.

Use 40mm PIR for floors, walls, pitched roofs, partial-fill cavities and flat roofs; XPS where you need a moisture-resistant board under a slab or below ground; and K103 where floor build-up is tight. Compare thicknesses with the PIR U-value calculator and the insulation calculator, or read what thickness of PIR you need and PIR vs EPS vs XPS floor insulation.

See also 40mm PIR insulation boards, XPS insulation all PIR insulation boards, and mixed-material 50mm, 100mm and 150mm insulation boards. Prices are ex VAT, with a £400 ex VAT minimum. Delivery is free in England, and £40 + VAT to mainland Wales and mainland Scotland.