100mm Flexible Slab (4.32 M2)

The Knauf 100 mm Flexible Slab (4.32 m²) is a high-performance glass mineral wool insulation slab designed for internal walls, partitions, floors and roofs. With a lambda value of 0.037 W/mK, it provides reliable thermal insulation while delivering excellent acoustic sound absorption, helping to reduce airborne noise and improve overall building comfort.

Manufactured by Knauf Insulation, the Flexible Slab features a resilient, flexible structure that allows it to friction-fit tightly between timber and metal studs or joists, minimising gaps and improving performance. The 100 mm thickness supports improved U-values in building elements and enhances dB sound reduction and Rw acoustic performance when installed as part of a complete system. Supplied in packs covering 4.32 square metres, the slabs are lightweight, easy to cut and quick to install on site.

Key Features

• Knauf Flexible Slab insulation

• Lambda value: 0.037 W/mK

• 100 mm thickness for thermal and acoustic performance

• Improves heat retention and reduces airborne sound (dB)

• Flexible, friction-fit design for tight installation

• Non-combustible glass mineral wool

• Supplied in packs covering 4.32 m²

Typical Applications

• Internal timber and metal stud partitions

• Acoustic insulation for walls, floors and ceilings

• Sound reduction in residential and commercial buildings

• Insulation between floor joists

• Roof insulation between rafters

Performance & Workability

• Supports improved thermal performance and U-values

• Enhances acoustic performance measured in dB and Rw

• Absorbs airborne sound within wall and floor cavities

• Flexible structure ensures close fit around services

• Lightweight and easy to handle and cut on site

Technical Specification

• Product Type: Flexible Insulation Slab

• Manufacturer: Knauf Insulation

• Insulation Type: Glass Mineral Wool

• Thickness: 100 mm

• Thermal Conductivity (Lambda): 0.037 W/mK

• Coverage per Pack: 4.32 m²

• Application: Internal Walls, Floors and Roofs

• Reaction to Fire: Non-combustible

Why Choose Knauf 100 mm Flexible Slab?

The Knauf 100 mm Flexible Slab is a versatile insulation solution for projects requiring low lambda thermal performance and improved acoustic dB sound reduction. Its flexible friction-fit design, non-combustible construction and proven thermal and acoustic properties make it a trusted choice for enhancing comfort, energy efficiency and sound control in modern buildings.