MGO Flooring Underlayment and Subfloor Panels

MGO (Magnesium Oxide) flooring underlayment and subfloor panels are inorganic, fire-resistant, and highly dimensionally stable modern flooring base materials. They are mainly made of magnesium oxide, magnesium sulfate / magnesium chloride, fiberglass mesh, plant fibers, and lightweight fillers. They can meet multiple requirements such as structural load-bearing, fireproofing, moisture resistance, sound insulation, thermal insulation, and fast installation, making them a high-performance alternative to traditional plywood, OSB, and gypsum underlayment.

 

 MGO Subfloor Panels

• Structural layer: Load-bearing structural board, directly installed on wood or steel joists to replace traditional OSB or plywood.
• Core functions: Provide structural strength, dimensional stability, fireproofing, and moisture-proof base for finished flooring (solid wood, tile, LVT, carpet, etc.).

MGO Flooring Underlayment

• Functional layer: Non-load-bearing leveling and enhancement layer, installed over OSB / plywood or used as a thin leveling layer.
• Core functions: Leveling, moisture-proofing, sound insulation, fireproofing, and improving adhesion for floor finishes. Solves problems such as wet construction, long curing time, and easy cracking of traditional gypsum underlayment.

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Main Formulations

• MgCl₂ type: Traditional formula, high strength, low cost; suitable for dry environments.
• MgSO₄ type: Chloride-free / low chloride, no halogen return, no steel corrosion, better water resistance; ideal for humid areas and steel structures.

 

Production Process

• Raw material mixing → multi-layer fiberglass mesh reinforcement → pressing → curing → sanding and profiling (T&G, square edge, shiplap) → finished panels.Full dry process, no curing time required.

 

About Fire Resistant Flooring Board

 

 Key Performance Advantages

Fire Resistance (Outstanding Advantage)

• Class A1 non-combustible, melting point above 2700°C.
• Fire resistance up to 1–3 hours (ASTM E119 / UL 263).
• Releases water vapor under high temperature to suppress fire and smoke.

Moisture Resistance & Dimensional Stability

• Water-resistant: No delamination or cracking after water immersion.
• Low expansion rate: Only 0.1%–0.12%, no warping or swelling.
• Chloride-free formula eliminates "sweating" and corrosion.

Structural Strength

• High bending strength, suitable for structural subfloor.
• 20 mm panel can span joists up to 24 inches (610 mm).
• Excellent impact and concentrated load resistance.

Environmental & Healthy

• No formaldehyde, no asbestos, no VOCs.
• Antibacterial, mold-resistant, and termite-proof.

Sound & Thermal Insulation

• Improves both airborne and impact sound insulation.
• Good thermal performance, compatible with underfloor heating.

Easy Installation

• Dry installation, no curing time.
• Can be cut, drilled, nailed, and screwed with standard tools.
• Available with T&G, shiplap, or square edges for tight joints.

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 Standard Specifications

MGO Subfloor Panels

• Thickness: 16, 18, 20, 22 mm (20 mm most popular)
• Size: 1220×2440 mm, 900×2440 mm, 600×2440 mm
• Density: 1.15–1.25 g/cm³
• Edges: T&G, shiplap, square edge

 MGO Flooring Underlayment

• Thickness: 6, 8, 10, 12 mm
• Mainly used for leveling, sound insulation, and moisture-proofing.

 

Fire Resistant Flooring Board Application Scenarios

Applications

• Residential: Flooring base for bedrooms, living rooms, basements, underfloor heating systems.
• Commercial: Offices, hotels, schools, hospitals, shopping malls.
• Special: Modular buildings, steel structures, high-humidity areas, fire-rated projects.
• Installation Systems
• System 1 (Single-layer structural subfloor):Joists → 20 mm MGO subfloor → finished floor
• System 2 (Underlayment system):Joists → OSB / plywood → MGO underlayment → finished floor

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Comparison with Traditional Materials

• MGO: A1 fireproof, waterproof, stable, no formaldehyde, dry construction.
• OSB / Plywood: Flammable, unstable when wet, contains formaldehyde.
• Gypsum Underlayment: Low strength, fragile, wet construction, long curing.

 

Fire Resistant Flooring Board Features And Advantages

 

Product Detail：

 

Product Parameters:

Main materials	MgO, MgCl2/MgSO4, Glass fiber Mesh
Fire performance	Non-combustible, No flame spread, No smoke spread,No poisonous gas
Density	1.15-1.25g/cm3,
Flexural strength	16-35Mpa
Impact strength	≥14 kJ/m2
Moisture content	≤8%
Shrinkage	≤0.3%
Wet expansion rate	≤0.3%
Nail holding rate	90-140/(N/mm)
Chloride ion content	0.1%(MOS),3%(MOC)
Edge	Square/T&G/Tapered/Beveled
Thickness	15-20mm
Standard sizes	4*8ft/1.22*2.44m(Other sizes can be customized)
Production capacity	5000 square meters / day
Remark	The above parameters are acceptable to ODM

 

About The Factory：

Fire Resistant Flooring Board Factory

 

Our Service：

Our reputation is built on our innovative formula design, rigorous quality control, technical expertise, and meticulous attention to detail-all ensuring consistent product excellence.

We take pride in our proactive service model, dedicated to ensuring our products align with your project requirements. Every batch undergoes laboratory testing, and each panel is inspected prior to packaging, guaranteeing uncompressed quality at every stage.

 

Company Advantage (Why choose us)：

Specializing in the durability of building materials, we have established ourselves as a leading provider in the local fireproof flooring sector by offering robust, fire-resistant boards.

Our rigorous full-process quality control system ensures consistency at every stage:

1. Incoming Quality Control (IQC) for raw materials to verify baseline standards

2. In-Process Quality Control (IPQC) with continuous monitoring of critical production phases

3. Outgoing Quality Control (OQC) covering final cutting, packaging, and comprehensive checks before dispatch.

All our finished products adhere to national and industry benchmarks, undergoing thorough testing against standards such as GB/T 33544 or T/CMMA8-2020. We also accommodate custom testing requirements specified by clients, ensuring that only inspected and certified products are released for delivery. This commitment to quality has solidified our reputation for reliability in fireproof building solutions.

 

FAQ:

 

1. Q: Can you customize products according to our requirements?
     A: Yes, we gladly accept OEM/ODM orders to meet your specific needs.
2. Q: What are your payment terms?
     A: Payment is made via T/T: 50% deposit upfront, with the balance due before shipment.

 

Packing And Shipping:

Packaging And Shipping Of Fire Resistant Flooring Board

 

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