To support structural engineers, acoustics consultants, and general contractors in subfloor selection, the table below compares core engineering properties based on standard structural floor testing:
| Performance Property | High-Density MgO Board (≥1,100kg/m3) | Structural OSB / Plywood | Fiber Cement Subfloor |
| Material Chemistry | Crystalline MgO Matrix + Double Layer Glass Mesh | Organic Wood Strands + Resin Binders | Portland Cement + Cellulose Fibers |
| Fire Reaction (ASTM E136) | Non-Combustible (Zero Flame/Smoke Spread) | Combustible (Spreads Flame) | Non-Combustible |
| 1-Hour / 2-Hour Floor Assembly | Direct UL/ASTM E119 Rated Assemblies | Requires Gypsum Underlayment Pour | Requires Additional Fire Layers |
| Bending Flexural Strength | ≥ 20 – 24MPa | ≈12 – 15MPa | ≈ 14 – 18MPa |
| Moisture Swelling (24h Immersion) | < 0.10(Zero Edge Swell) | 10% – 15%Edge Delamination | < 0.50% |
| Mold & Termite Resistance | 100% Inorganic / pH 10–11 (Zero Growth) | High Organic Vulnerability | High Mold Resistance |
| Fastener Holding Strength | High Pull-Out / Flush Self-Countersinking | Softens under Dynamic Traffic Load | Prone to Micro-Cracking around Edge Screws |
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NOV
2026
NOV
2026
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