For heavy-duty flooring applications, Tongue &
Groove (T&G) MgO boards are often the gold standard due to their
structural integrity and superior fire resistance compared to traditional
plywood or OSB.
Here is a breakdown of the technical specifications,
benefits, and installation considerations for T&G MgO flooring:
1. Key Technical Advantages
- Fire
Rating: Most high-quality MgO boards are classified as non-combustible
(Class A1/UL 050). They do not contribute to flame spread and maintain
structural stability under high heat.
- Dimensional
Stability: Unlike wood-based subfloors, MgO does not warp,
swell, or delaminate when exposed to moisture. This is critical for
maintaining the T&G joint integrity.
- Insects
& Mold: Naturally resistant to termites and mold growth, as
the inorganic composition does not provide a food source for biological
agents.
- Acoustics: Due
to its high density, MgO flooring offers excellent sound dampening
properties (STC and IIC ratings) compared to lightweight timber boards.
2. Common Flooring Specifications
|
Feature |
Standard
Range |
|
Thickness |
18mm to
20mm (Typical for structural subflooring) |
|
Density |
$1,000
\text{ kg/m}^3$ to $1,200 \text{ kg/m}^3$ |
|
Edge
Profile |
2-sided
or 4-sided Tongue & Groove |
|
Bending
Strength |
15–20 MPa
(Depending on glass fiber mesh layers) |

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