MgS Board A1 Fireproof Subfloor (18mm)

Overview

Manufactured using a high-performance magnesium sulphate (MgSO₄) cement formulation, MSB Subfloor Boards deliver exceptional fire performance, dimensional stability, and structural reliability. These advanced boards offer a robust alternative to traditional subfloor materials, often replacing multiple layers with a single panel that provides comparable — and frequently superior — fire, acoustic, and structural characteristics.

Ideal for new-builds, refurbishments, and modular construction, MSB subfloor panels perform consistently in challenging environments thanks to their non-combustible composition and strong moisture resistance.

Key Advantages of MSB Subfloor Boards

A1 Fire Safety:
Fully non-combustible and classified A1, providing maximum fire protection in residential, commercial, and industrial applications.

Outstanding Moisture Resistance:
Engineered to resist moisture uptake, preventing swelling, warping, or deterioration – ideal for wet rooms, kitchens, ground floors, and exposed build stages.

High Durability & Longevity:
MSB subfloor panels deliver long service life, outperforming timber-based and cement-based alternatives in stability and resistance to impact.

Excellent Levelness:
Provides a smooth, flat, and stable substrate for a wide range of floor finishes including vinyl, laminate, engineered timber, and tiles.

Sustainable Composition:
Produced using non-chloride, environmentally considerate materials, supporting greener construction practices and long-term indoor air quality.

Technical Specifications

Thickness:
16–22 mm

Available Sizes:
600 × 2440 mm
900 × 2440 mm
1220 × 2440 mm

Surface:
Standard or sanded

Edge Options:
Square
Tongue & Groove (T&G)
Shiplap

Fire Rating:
A1 non-combustible (EN classification)

Moisture Movement:
0.10% – 0.12%

Density:
1150 – 1250 kg/m³

Flexural Strength:
18 – 30 MPa

Modulus of Elasticity:
5000 – 8000 MPa