Knauf GifaFloor FHB 25 – 600mm x 1200mm x 25mm (Article 31256)

The Knauf GifaFloor FHB 25 is a high-density A1 non-combustible calcium sulphate (gypsum fibre) raised floor panel designed for superior structural stability, acoustic performance, and durability in modern commercial environments. Manufactured to EN 15283-2, this 600mm x 1200mm x 25mm precision-engineered panel features a tongue-and-groove edge profile for a rigid, monolithic floor surface ideal for offices, data centres, control rooms, and dry screed applications.

• A1 Fire Rated: Fully non-combustible gypsum fibre panel tested to EN 13501-1.
• High Density ≥ 1500 kg/m³: Provides outstanding load stability for raised floor systems.
• Tongue & Groove Joint: Creates a rigid, monolithic deck with minimal movement.
• Excellent Acoustic Performance: Reduces airborne and impact sound transmission.
• Low Electrostatic Resistance: ≥ 1×10⁷ Ω (EN 1081) — suitable for technical spaces.
• Low Emissions: Meets AgBB, French A+, IBR, and Eurofins Indoor Air Comfort Gold standards.
• Recycled Content: Approx. 10% post-consumer & 40% pre-consumer recycled material.

Product Specifications

• Dimensions: 600mm x 1200mm x 25mm
• Article Number: 31256
• EAN: 4003982182814
• Material: High-density gypsum fibreboard (calcium sulphate)
• Reaction to Fire: A1 (Non-combustible) – EN 13501-1
• Density: ≥ 1500 kg/m³ – EN 15283-2
• Edge Profile: Tongue and groove
• Surface Hardness: ≥ 40 N/mm² (Brinell)
• Electrostatic Resistance: ≥ 1×10⁷ Ω – EN 1081
• Flexural Tensile Strength: ≥ 8.7 N/mm²
• Dimensional Tolerance (W/L): +0.5 / -0.5 mm – EN 15283-2
• Dimensional Tolerance (Thickness): +0.2 / -0.2 mm
• Thermal Conductivity (λ): 0.56 W/(m·K) – EN 12524
• Thermal Resistance (R₁₀): 0.0906 (m²·K)/W – EN 12664
• Specific Heat Capacity: > 1000 J/(kg·K)
• Coefficient of Thermal Expansion: 12.9×10⁻⁶ 1/K
• Humidity Expansion: ≤ 0.6 mm/m (ΔRH 30% at 20°C)
• Water Vapour Diffusion (μ): 30/50
• Cobb Water Absorption: < 300 g/m² – EN 15283-2
• Installation Conditions: +10°C to +35°C, 45–75% RH
• Usage Conditions: -10°C to +35°C, 35–75% RH

Can be machined using standard woodworking tools.
Environmentally certified with EPD (IBU), FDES, and IBR approval.

Pair with our full range of access flooring pedestals and system accessories for a complete flooring solution.

Order Online – Fast UK Delivery

Upgrade your raised flooring system with Knauf GifaFloor FHB 25 panels and benefit from superior fire performance, high load stability, and outstanding acoustic control — delivered quickly and reliably across the UK.