Why Modern MgO Subflooring is Non-Corrosive？

 The non-corrosive nature of premium MgO subfloor panels relies entirely on their chemical matrix:

  Magnesium Sulfate Formulation (): By replacing Magnesium Chloride () with Magnesium Sulfate, the manufacturing process eliminates free chloride ions.

  Zero Leaching: Sulfate-based boards do not exhibit hygroscopic (moisture-attracting) pulling of ambient water in high-humidity zones. Because the board stays dry internally and lacks chlorides, it will not degrade or corrode steel joists, light-gauge steel framing, or subfloor fasteners.

  Acoustic & Structural Integrity: The resulting matrix is a dense, crystalline structure that provides excellent shear strength and acoustics without compromising the surrounding metal infrastructure.

For structural subfloor applications (such as modular construction, multi-family mid-rises, or heavy-duty commercial spaces), non-corrosive MgO boards typically conform to the following engineering profiles:

Property	Typical Specification
Standard Thicknesses	15mm, 18mm, 20mm
Edge Profile	Tongue & Groove (T&G) or Square-Edge (S-Edge)
Density	High Density ( to )
Fire Rating	Class A1 (Non-combustible) / ASTM E136
Flexural Strength	High structural capacity (capable of meeting span ratings for 16" or 24" on-center joist spacing) More iinformation, please visit at www.hocre-board.com or send message by whatsapp +86 15001321220

MgO T&G Panels vs. Traditional Subfloors

 When comparing Magnesium Oxide (MgO) Tongue & Groove (T&G) Panels to traditional subflooring materials—primarily Oriented Strand Board (OSB) and Plywood—the choice comes down to a balance between high-performance durability and upfront material costs.

MgO panels have rapidly gained traction in commercial, modular, and high-end residential builds due to their superior material properties. Here is a detailed breakdown of how they stack up against traditional options.

Technical Performance Comparison

Feature	MgO T&G Panels	Traditional Subfloors (OSB / Plywood)
Fire Rating	Class A1 / Flame Spread 0 (Non-combustible)	Combustible (Requires additional fire-rated underlayments)
Moisture Resistance	Excellent; does not delaminate, swell, or rot	Poor to Moderate; prone to edge-swelling and delamination
Mold/Pest Resistance	Naturally immune to mold, termites, and wood-boring insects	Vulnerable unless heavily chemically treated
Dimensional Stability	High; minimal expansion/contraction	Moderate; prone to warping, cupping, and squeaking over time
Environmental Impact	Low carbon footprint; captures  during curing; formaldehyde-free	Higher VOC emissions (glues/resins); intensive logging

 

More information, please visit at www.hocre-board.com or send message by whatsapp +86 15001321220