Magnedure 19mm MgO Subfloor Board
Magnedure is a high-performance subfloor board manufactured using advanced magnesium sulphate cement technology. Developed as a robust alternative to conventional fibre-cement and timber-based substrates, it combines non-combustibility, structural strength, moisture resistance and dimensional stability in one practical flooring panel.
Each board is reinforced with high-tensile glass-fibre mesh to deliver excellent rigidity and bending strength without the bulk of many traditional cement-based products. Magnedure can be cut and installed using standard carpentry tools and familiar construction methods, making it straightforward to specify and efficient to work with on site.
Specifications
Magnedure is manufactured using advanced BMSC (basic magnesium sulfate cementitious) chloride-free MgO technology.
Magnedure is supplied in two size of installation-ready panels:
1350 x 600 x 19mm; or
2700 x 600 x 19mm.
Edge treatment: tongue & groove
It is intended for use as an interior flooring substrate, and is not intended to be left exposed.
Key Benefits
Fire Resistance: The mineral composition of Magnedure means it is non-combustible by nature, it will not ignite or contribute to a fire. Testing shows Magnedure meets the ASTM E136 requirement.
Strength: Engineered for flooring, the high density and excellent mechanical strength of Magnedure means a rigid floor that feels solid underfoot, and provides confidence in demanding applications.
Moisture Resistance: Magnedure resists moisture-related swelling, mould and rot, making it a reliable product in changing conditions.
Acoustic Performance: The density and rigidity of Magnedure make it ideally suited to high-performance acoustic floor assemblies, helping reduce vibration and unwanted sound transfer between spaces.
Simple to Install: Magnedure sheets can be cut, fixed and installed using familiar construction methods and appropriate tools.
Applications
Where Magnedure is Used
Magnedure suits a wide range of building types and framing systems. It can be used as a standalone subfloor or within an integrated acoustic floor assembly.
Residential Homes
New builds and renovations using timber or steel framing.
Multi-Unit Developments
Reliable performance across multiple tenancies where fire and acoustic requirements matter.
Mass Timber Construction
A non-combustible topping option for engineered timber floors.
Acoustic Floor Assemblies
Used as the structural substrate within SoundDown systems, combining strength and acoustic performance in one product.
Fire-Rated Floor Assemblies
Supports compliant fire-rated floor and ceiling systems.
Installation Overview
Simple. Familiar. No Specialist Trades Required.
Magnedure is installed using standard subfloor practices. It is fully compatible with existing construction workflows and requires no specialist equipment or trades.
- Boards are laid perpendicular to joists at maximum 450mm centres.
- Tongue and groove joints are glued and fixed
- Install in a staggered pattern for structural continuity
- Fix using standard subfloor screws
NZBC Compliance
Independently Tested. Code Compliant.
Magnedure has been independently tested and contributes to compliance with the following New Zealand Building Code clauses. All documentation is available for download and is suitable for use in specification and building consent processes.
| Table Header | Table Header |
|---|---|
|
B1 – Structure
B1.3.1, B1.3.2
B1.3.3 (a, b), B1.3.4
|
Structural performance. |
|
B2 – Durability
B2.3.1 (a), B2.3.2 (a)
|
Long-term performance in protected internal environments. |
|
C3 (Fire Affecting Areas Beyond the Source) C3.7 (a) |
Non-combustible classification. Suitable for use in fire-rated floor assemblies. |
|
F2 (Hazardous Building Materials)
F2.3.1
|
MgO boards are not known to release hazardous gases or materials. |
|
G6 (Airborne and Impact Sound)
G6.3.1, G6.3.2
|
Contributes to airborne and impact sound reduction. |
Technical Documents
Download Technical Information
Everything you need to specify and install Magnedure. All documents are available as free PDF downloads.
BPIR Declaration and Compliance Statement
Building Product Information Requirements declaration for use in specification and consent processes.
Product Specification
Full product data sheet including dimensions, material properties, and performance data.
Design and Load Tables
Use of Table 3.1 in AS/NZA 1170.1 to show the uniform distribution and concentrated loads Magnedure sheets have been tested to withstand..
Design and Installation Guides
Installation requirements, framing specifications and fixing details.
Care and Maintenance Guide
Guidance on handling, storage, and long-term care of installed Magnedure boards
Test Reports
Independent test reports confirming structural and fire performance.
Need help specifying Magnedure? Get in touch.
We can help with design details, specification support, compliance questions, and pricing. Contact us today.
