CDM Fibran XPS-500C

The Fibran XPS-500C Insulation Board is a 50mm thick, closed-cell extruded polystyrene (XPS) board engineered for high-performance thermal insulation and waterproofing applications. Manufactured to EN 13164, it delivers exceptional durability, water resistance, and compressive strength.

Designed for demanding below-ground and external environments, XPS-500C is ideal for cavity drain waterproofing, external wall protection, green roofs, and earth-retained structures, including installations within the water table.

Key Benefits

• Excellent thermal insulation with low thermal conductivity (0.035 W/mK)
• Closed-cell structure provides permanent waterproof and vapour resistance
• High compressive strength rated at 500 kPa for long-term structural stability
• Can be fully submerged without performance degradation
• Estimated 50-year lifespan, matching the service life of the building
• 100% recyclable, CFC & HCFC-free, and resistant to rodents, insects, and mould

Typical Applications

• Cavity drain waterproofing systems (used as a 50mm spacer)
• Protection of liquid-applied waterproofing membranes on retained walls
• Insulated support for bonded waterproofing systems
• Parking decks, podium slabs, and green roof systems
• External insulation for subterranean and earth-retained structures

Suitable Substrates

• Compacted, clean, and level surfaces
• Basement concrete floor slabs and rafts
• Earth-retained concrete walls, mortar, or ICF construction
• Compacted blinding layers

Product Data & Specifications

• Board Size: 50mm x 1000mm x 600mm
• Coverage: 0.6m² per board
• Compressive Strength: 500 kPa at 10% deformation
• Long-Term Water Absorption: 0.7%
• Service Temperature Range: -50°C to +75°C
• Reaction to Fire: Euroclass E
• Global Warming Potential (GWP): <5 kg CO₂ Eq

View other XPS insulation boards

Shipping & Delivery

• Palletised lorry delivery – charges apply based on order size
• Collection available – contact customer services on 01268 472358

Downloads