40mm Ravatherm XPS 300 SB Extruded Polystyrene

40mm Ravatherm XPS 300 SB is a robust XPS thermal insulation board featuring a butt-edge profile, engineered for challenging construction environments. This product achieves excellent thermal performance with a declared thermal conductivity of 0.030 W/mK for thicknesses up to 120mm, and 0.031 W/mK for thicknesses exceeding this threshold, supporting compliance with UK Building Regulations and energy-efficiency standards.

Built with environmental responsibility at its core, 40mm Ravatherm 300 SB carries a Global Warming Potential (GWP) of less than 5, positioning it as a sustainable insulation solution.

Its exceptionally low water absorption, verified to BS EN 12087:2013 standards, makes this extruded polystyrene insulation particularly suitable for below DPC cavity wall insulation and other moisture-critical applications.

40mm Ravatherm XPS 300 SB boards come in a comprehensive thickness range spanning 30mm to 200mm, delivering adaptability across diverse UK residential and commercial construction schemes.

Key Benefits

• Thickness: 40mm
• Board Length: 2500mm
• Board Width: 600mm
• Pack Quantity: 10
• Board Coverage: 1.5m2
• Pack Coverage: 15m2
• Thermal Conductivity: 0.030W/mK
• R-Value: 1.32m2K/W
• Compressive strength@ 10% deformation: 300kPa
• Compressive Creep max after 50 years < 2% deformation under stress σC: 130kPa
• Fire Rating (Reaction to Fire): E
• Water vapour diffusion resistance factor μ (tabulated value): 100
• Temperature limits: -50/+75
• Edge Profile: Butt Edge
• Surface finish: Skin

Application

• Ground bearing floor below screed
• Ground bearing floor below concrete slab
• Basement floors and retaining walls
• Suspended floor
• Swimming pool

Features

1. Homogeneous, closed-cell material structure
2. Permanently high thermal insulation level
3. Negligible moisture uptake
4. High strength, rigidity and dimensional stability
5. Water and frost resistance
6. High compressive strength
7. High vapour diffusion resistance
8. Resistance to rot and deterioration
9. Simple and quick installation

Info

Browse our full range of Ravatherm Extruded Polystyrene Insulation products. We deliver across the UK Mainland. For product suitability advice on your specific project or to request a bulk discount quotation, contact us on 02038839057 / 02038839057, email sales@insulationbee.co.uk or use Live Chat for competitive UK insulation pricing.