50mm PIR Insulation 2400 x 1200mm
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Ranging from 50-150mm thickness, these rigid foam panels (brands like Celotex/Kingspan) offer superior thermal performance (0.022W/mK). The 150mm version achieves exceptional U-values in roofs, while thinner options suit wall cavities. Protective gloves are recommended during cutting to prevent skin irritation
As of August 2026, PriceNailer data confirms that the cheapest price for 50mm PIR Insulation 2400 x 1200mm is £27.78 from Insulation UK across 8 suppliers. Prices have increased by 28.3% over the last 19 months.
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Frequently Asked Questions
What is the thermal conductivity of 50mm PIR insulation?
50mm PIR insulation typically has a thermal conductivity of 0.022W/mK, making it one of the most thermally efficient insulation materials available. This low lambda value means it provides excellent insulation performance in a relatively thin profile.
Can I cut 50mm PIR insulation boards to size?
Yes, 50mm PIR insulation boards can be easily cut using a sharp knife or fine-toothed saw. Always wear protective gloves when cutting as the foam can cause skin irritation. Measure twice and cut once for best results.
Is 50mm PIR insulation suitable for wall cavities?
Yes, 50mm PIR insulation is ideal for wall cavities where space is limited but high thermal performance is required. The 2400 x 1200mm boards can be cut to fit standard stud spacing and provide excellent thermal bridging prevention.
What U-value does 50mm PIR insulation achieve?
50mm PIR insulation typically achieves a U-value of approximately 0.44 W/m²K when used alone. However, the actual U-value depends on the construction type and whether it's combined with other insulation materials in the build-up.
Do I need a vapour barrier with 50mm PIR insulation?
Most 50mm PIR insulation boards have integral foil facings that act as vapour control layers. However, you should always check building regulations and manufacturer guidelines for your specific application to ensure compliance.