Magnesium Oxide Exterior & Interior Sheathing MgO Boards
With excellent fire resistance, moisture resistance, weather resistance, as well as lightweight and easy installation features, MgO sheathing boards have become a preferred material for building enclosure structures. External sheathing boards demonstrate strong disaster resistance in super high-rise buildings, industrial plants, and other fields, while internal sheathing boards highlight advantages in scenarios with strict environmental requirements such as medical care and education. With the application of chlorine-free formulations and renewable materials, MgO sheathing boards are developing in a more environmentally friendly and intelligent direction, providing sustainable solutions for green buildings.
- Fast Delievery
- Quality Assurance
- 24/7 Customer Service
Product Introduction
What Is Magnesium Oxide Exterior & Interior Sheathing MgO Boards
Magnesium oxide (MgO) sheathing board is a high-performance building material composed of magnesium oxide (MgO) as the core component, combined with fiberglass mesh, mineral additives, and other materials. It is widely used for the protection and decoration of internal and external walls in construction.
Advantages of Magnesium Oxide Exterior & Interior Sheathing MgO Boards
Excellent Fire Resistance
Excellent fire resistance, meeting Class A1 non-combustible standard (GB 8624) with a maximum fire resistance limit of 2 hours
High Moisture Resistance
Superior moisture and mold resistance (water absorption rate ≤10%), suitable for direct use in humid areas like kitchens and bathrooms
Strong Durability
High mechanical strength, featuring strong impact resistance, tensile resistance, and nail-holding power, with a service life of over 25 years
Good Sound Insulation
Outstanding sound insulation with airborne sound insulation index ≥40 dB, effectively blocking noise transmission
Easy to Install
Easy to install and highly adaptable, can be directly decorated or used as a base material for multiple scenarios such as building internal/external walls and fire compartments
Environmentally Friendly
Environmentally friendly and safe, formaldehyde-free and asbestos-free with low VOC emissions, complying with E0-grade environmental standards
Why Choose Us
Rich Experience
Our company has many years of production work experience. The concept of customer-oriented and win-win cooperation makes the company more mature and stronger.
Advanced Equipment
A machine, tool or instrument designed with advanced technology and functionality to perform highly specific tasks with greater precision, efficiency and reliability.
High Quality
Our products are manufactured or executed to very high standards, using the finest materials and manufacturing processes.
Competitive Price
We have professional sourcing team and cost accounting team, stive to reduce cost and profit and provide you a good price.
24H Online Service
We try and respond to all concerns within 24 hours and our teams are always at your disposal in case of any emergencies.
One-Stop Solution
With rich experience and one-to-one service,we can help you choose products and answer technical questions.
Structure Design of Magnesium Oxide Exterior & Interior Sheathing MgO Boards
1. External Sheathing Boards
Dual-layer composite structure: Typically adopts a "MgO board + insulation layer + MgO board" sandwich design. The outer MgO board has a thickness of 6-15mm, with its density enhanced to 1000-1100 kg/m³ through high-temperature calcination. The surface can be sprayed with weather-resistant coatings (such as fluorocarbon paint) to resist UV radiation and acid rain erosion.
Insulation layer configuration: The middle layer is filled with EPS (expanded polystyrene), XPS (extruded polystyrene), or rock wool, with the thickness adjusted according to energy-saving requirements (commonly 50-150mm). It forms a high-efficiency thermal insulation system with a thermal conductivity of ≤0.04 W/(m·K).
Reinforced structure: Fiberglass mesh is tightly bonded with MgO cement to improve tensile strength (≥7 MPa) and impact resistance (≥2.0 kJ/m²), meeting the wind pressure resistance requirements of external walls in high-rise buildings.
2. Internal Sheathing Boards
Single-layer solid structure: With a thickness of 3-12mm and a density of 0.85-1.00 g/cm³, the surface can be directly pasted with decorative films, painted with latex paint, or tiled. Some products are embedded with antibacterial coatings during production, suitable for environments with high hygiene requirements such as hospitals and food workshops.
Moisture-proof treatment: Modified with silane coupling agent technology, the board has a water absorption rate of ≤10%, with better moisture-proof performance than traditional gypsum boards. It can be directly used in humid areas such as kitchens and bathrooms.
Joint optimization: The edges are designed with 45° bevels or tongue-and-groove structures. When matched with special joint adhesive and fiberglass mesh, it reduces the risk of cracking, with a flatness error of ≤2mm/2m.
Magnesium Oxide Exterior & Interior Sheathing MgO Boards
Comparison of Core Performance
| Performance Indicator | External Sheathing Boards | Internal Sheathing Boards |
|---|---|---|
| Fire Rating | Class A1 non-combustible (GB 8624), fire resistance up to 2 hours (ASTM E119) | Class A1 non-combustible; some products hold Class B1 flame-retardant certification (GB 8624), suitable for fire compartments |
| Weather Resistance | UV aging resistance (no discoloration after ≥500 hours of QUV testing), corrosion resistance in salt spray test for >200 hours | Moisture-proof and mold-proof (strength retention rate ≥75% in 90% humidity environment), suitable for indoor humid areas |
| Mechanical Strength | Flexural strength ≥16 MPa, wind pressure resistance up to 900 Pa (GB/T 7019) | Flexural strength ≥10 MPa, nail-holding power ≥15 N/mm (GB/T 7019), meeting daily use requirements |
| Sound Insulation Performance | Airborne sound insulation index ≥40 dB (ISO 140), can be increased to 45 dB with insulation layer | Airborne sound insulation index ≥44 dB (GBJ 121), impact sound insulation index ≤65 dB (ISO 717) |
| Environmental Friendliness | Formaldehyde-free and asbestos-free (SGS certified), recyclability rate up to 90% | Formaldehyde emission ≤0.1 mg/L (E0 grade), VOC emission ≤10 g/m³ (GB 18580) |
Production Process & Quality Control of Magnesium Oxide Exterior & Interior Sheathing MgO Boards
1. Raw Material Selection
External sheathing boards use high-purity magnesium oxide powder (MgO content ≥90%) and alkali-resistant fiberglass mesh (grammage ≥160 g/m²) to ensure long-term weather resistance.
Internal sheathing boards add activated silica fume and water reducer to optimize compactness and impermeability.
2. Key Processes
External boards: Adopt vacuum pressing process (pressure ≥1.5 MPa) and high-temperature curing (60-80℃) for 7 days to form a dense crystalline structure.
Internal boards: Formed by the slurry method and natural curing for 28 days to ensure a moisture content of ≤8%.
3. Quality Standards
External boards must comply with PAS 670:2021 certification (strength retention rate ≥75% in 90% humidity environment).
Internal boards meet GB/T 25975 standard, with dimensional tolerances of ±0.3mm (thickness) and ±2mm (length/width).
1. External Sheathing Boards
External walls of high-rise buildings: For example, the Shenzhen Qianhai Financial Center project adopts a 12mm MgO board + 100mm rock wool sandwich structure, with a fire resistance of 120 minutes and wind pressure resistance meeting the 9-degree seismic fortification requirements in coastal areas.
Industrial plant enclosure: The external walls of a photovoltaic factory in Shandong use 8mm MgO boards + 50mm XPS, combined with fluorocarbon coatings, with a weather-resistant service life of over 25 years.
Prefabricated buildings: Modular houses adopt MGO SIPs (Structural Insulated Panels), realizing factory prefabrication and on-site rapid installation, improving construction efficiency by 40%.
2. Internal Sheathing Boards
Clean areas of hospitals: The operating room walls of a Grade A tertiary hospital in Shanghai use 6mm antibacterial MgO boards, with a surface resistance of 10⁶-10⁹Ω, meeting ISO 14644-1 Class 8 cleanliness standards.
Hotel bathrooms: A five-star hotel in Hangzhou uses 8mm moisture-proof MgO boards as tile backings, with a water absorption rate of ≤5%, eliminating leakage and mold growth.
Fire compartments in schools: The corridor partitions of a primary and secondary school in Beijing use 12mm MgO boards, with a fire resistance of 2 hours, complying with GB 50016 fire code.
What Type Of Fire Testing Has Been Conducted On Magnesium Oxide Exterior & Interior Sheathing MgO Boards
There are several types of fire testing that have been conducted on Fire-resistant magnesium oxide board, including:
Fire Resistance Testing
This involves subjecting the wallboard to controlled fire conditions to determine its ability to resist fire and prevent the spread of flames. The wallboard may be tested for a specific duration, such as 30 minutes, 60 minutes, or even longer, to assess its fire resistance rating.
Flame Spread Testing
This test measures the rate at which flames spread across the surface of the wallboard. It helps determine the material's ability to limit the spread of fire and prevent it from engulfing a larger area.
Smoke Density Testing
This test evaluates the amount of smoke emitted by the wallboard when exposed to fire. It is important because smoke inhalation can be a significant hazard during a fire event.
Toxicity Testing
This involves assessing the release of toxic gases or chemicals from the wallboard when exposed to elevated temperatures. Toxic gases emitted during a fire can pose health risks to occupants.
How is the Sound Insulation Performance of Magnesium Oxide Exterior & Interior Sheathing MgO Boards ?
This is a crucial question, as sound insulation is one of the core requirements for building materials. Both external and internal magnesium oxide (MgO) sheathing boards offer excellent sound insulation performance: external boards focus on airborne sound insulation, while internal boards effectively control both airborne and impact sound, outperforming traditional building materials overall.
1. Sound Insulation Performance of External Sheathing Boards
Core indicator: Airborne sound insulation index ≥ 40 dB (per ISO 140 standard), which can be increased to over 45 dB when combined with an intermediate insulation layer.
Sound insulation principle: The "MgO board + insulation layer" sandwich structure forms an acoustic barrier. The insulation layer (such as rock wool or XPS) absorbs sound wave energy through its porous or dense structure.
Key influencing factors: Board thickness (thicker boards yield better sound insulation-12mm boards offer 3-5 dB higher insulation than 6mm boards), insulation layer density (rock wool with a density ≥ 120 kg/m³ achieves optimal sound absorption), and joint sealing (filling with silicone weatherproof adhesive reduces sound leakage).
2. Sound Insulation Performance of Internal Sheathing Boards
Core indicators: Airborne sound insulation index ≥ 44 dB (per GBJ 121 standard) and impact sound insulation index ≤ 65 dB (per ISO 717 standard).
Sound insulation advantages: The solid, high-density structure (density 0.85-1.00 g/cm³) effectively blocks airborne sound. Fiberglass mesh and special adhesive at joints further reduce sound transmission through gaps.
Scenario adaptation: Excellent impact sound control makes it suitable for spaces sensitive to footstep and impact noise, such as bedrooms, hospital wards, and offices.
3. Comparative Advantages Over Traditional Boards
Superior to gypsum boards: Offers 5-8 dB higher airborne sound insulation than gypsum boards of the same thickness, with more stable impact sound control (gypsum boards are prone to impact sound transmission due to their hollow structure).
Superior to ordinary cement boards: MgO boards combined with fiberglass reinforcement cause greater energy loss during sound propagation, improving sound insulation by 10%-15%.
How Is Magnesium Oxide Exterior & Interior Sheathing MgO Boards Installed
1. Installation of External Sheathing Boards
Dry-hanging process: Fixed with galvanized angle steel keels (spacing 600mm) and stainless steel hangers. Joints are filled with silicone weatherproof adhesive (thickness 3±0.5mm) to form a waterproof and breathable layer.
Joint treatment: Internal and external corners adopt R50mm arc strips, and metal coping is installed on the top of parapet walls to prevent rainwater backflow.
2. Installation of Internal Sheathing Boards
Bonding and fixing: Paste on the base layer with special adhesive (thickness 2-3mm), reinforce with self-tapping screws (spacing 200mm), and attach 50mm-wide fiberglass mesh at joints to prevent cracking.
Moisture-proof treatment: For kitchens and bathrooms, apply waterproof adhesive (two coats) on the back of the boards, and make 300mm-high waterproof flanges at the junction with the ground.
3. Maintenance Recommendations
For external boards, inspect the coating integrity every 5 years and touch up damaged areas with fluorocarbon paint.
Regularly clean the surface of internal boards, avoid scratching with sharp objects, and replace the adhesive layer at joints when it ages.
Our Factory
We are a company dedicated to magnesia cement products. Our main products are Magnesium Oxide Boards(MGO Board) for construction and laminated MgO boards with for furniture and renovation. Our mission is to provide the world's construction markets with environmentally friendly, high-performance and sustainable green materials.
FAQ
Q: How does Fire-resistant MgO Wall Board provide fire resistance?
Q: What are the advantages of using Fire-resistant MgO Wall Board?
Q: Is fireproof Mgo wallboard suitable for both residential and commercial applications?
Q: Can fireproof Mgo wallboard be used in wet areas such as bathrooms or kitchens?
Q: How is fireproof Mgo wallboard installed?
Q: Does fireproof Mgo wallboard require any special maintenance?
Q: How does fireproof Mgo wallboard compare to other fire-resistant building materials?
Q: Can fireproof Mgo wallboard be painted or decorated?
Q: Is fireproof Mgo wallboard eco-friendly?
Q: How does fireproof Mgo wallboard contribute to energy efficiency?
Hot Tags: magnesium oxide exterior & interior sheathing mgo boards, China magnesium oxide exterior & interior sheathing mgo boards manufacturers, suppliers, factory, dadoed board, high strength wall board of magnesium oxide, magnesia insulating wall board, magnesia wall board for fireproof, printed board, wall panel in magnesia for energy saving
