Knauf GIFAfloor FHB18 Structural Dry Screed Panel

A high-density gypsum fibre structural screed board system, designed for superior load-bearing performance, fire resistance, and thermal efficiency. Suitable for installation over an existing raised access floor or as a self-supporting application, i.e spanning over cradle & batten

£24.59 ex. VAT

Product Information

Product Information

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The Knauf GifaFloor FHB Structural Screed Board System is a high-density gypsum fibreboard (≥1600 kg/m³), engineered to deliver exceptional load-bearing capacity, dimensional stability, and fire resistance. This advanced flooring system is a dry-installed alternative to traditional screed, offering a high-performance structural surface suitable for a wide range of commercial and residential applications.

Knauf GifaFloor FHB panels are available in thicknesses of 18 mm, 25 mm, 28 mm, 32 mm, and 38 mm, providing flexibility to suit different load requirements and installation methods. The precision-engineered tongue-and-groove edges allow for seamless interlocking, creating a flat, monolithic surface without the need for mechanical fixings.

Versatile Installation Options

2. Self-Supporting System (Cradle and Batten or Direct to Joists)

Knauf GifaFloor FHB can be used in a self-supporting system, installed over cradle and batten, timber joists, or metal substructures. This makes it an excellent choice for residential, modular, and off-site construction projects, offering a dry screed solution that enhances floor stability and acoustic performance.

Its high compressive strength and rigidity allow it to span across supports without excessive deflection, making it a cost-effective and efficient alternative to traditional wet screeds. The system is also thermally transparent, meaning it is highly compatible with underfloor heating, ensuring efficient heat transfer and reduced energy consumption.

1. Hollow Floor System (Pedestal Installation)

Knauf GifaFloor FHB can be installed as a hollow floor system, directly supported by adjustable pedestals. This configuration creates a service void beneath the floor, allowing for the integration of electrical, mechanical, and plumbing services. Minimum thickness required for installation on a pedestal is 25mm

The high load-bearing capacity of the system makes it ideal for applications where accessibility and flexibility are key, such as offices, hospitals, schools, airports, and commercial spaces. With fire ratings up to REI 90 and enhanced acoustic insulation, it provides a robust and safe flooring solution while maintaining a lightweight construction compared to concrete floors.

Installation Guide

Key Features

  • GifaFloor FHB18, 1200x600x18mm
  • Non Combustible A1 Fire Rating + REI30 fire resistance
  • Suitable for application to spanning joists/timbers
  • Overlay an existing raised access floor
  • Seamless tongue-and-groove installation – no screws required
  • Structurally sound – FHB18 – 2kN point load when spanning
  • Excellent acoustic and thermal performance
  • Ideal for underfloor heating systems
  • Dimensionally stable with minimal expansion or contraction
  • Quick, dry installation – no cement or water required
  • Compatible with a wide range of floor finishes, including tiles, stone, and vinyl

Installation Guide

Case Study

60 London Wall - Overlay to raised access floor

Knauf GifaFloor FHB18 was specified by Domus as an overlay to an existing raised access floor. This commercial building was being converted from a traditional office space where bare steel encapsulated raised access floor was already installed. FHB18 was installed as a structural separating layer over the existing raised floor to recieve a mixture of hard finishes and micro cement Click the link to read the case study in full

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Resources

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Find out why GifaFloor FHB18 is the ideal partner for underfloor heating systems

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