Magnesium Oxide Board Subfloor Underlayment
The core characteristics of MgO board subfloor underlayment can be summarized as "stable, protective, safe, convenient, and healthy"—that is, structurally stable to adapt to the base, moisture and fire resistant to ensure safety, convenient for construction to adapt to multiple scenarios, and environmentally friendly and healthy to be compatible with sensitive areas. It is an ideal underlayment material for improving the flatness, durability, and functionality of floor systems, and performs particularly well in buildings with humid environments, high fire protection requirements, or high standards for living experience.
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Product Introduction
What Is Magnesium Oxide Board Subfloor Underlayment
MgO board subfloor underlayment is an inorganic board made with magnesium oxide and magnesium chloride as the cementitious core, supplemented by reinforcing materials and functional additives, used between building base substrates and finishes to level, resist moisture, and provide fire protection.
Advantages of Magnesium Oxide Board Subfloor Underlayment
Strong Structural Stability, Adapting to Base Errors
High Flatness and Dimensional Stability
MgO board subfloor underlayment undergoes precision pressing and curing processes, with a surface flatness error of ≤0.5mm/m. It can effectively compensate for defects of the base (such as concrete slabs) like unevenness and honeycombing, providing a uniformly stressed foundation for finishing materials. Its shrinkage rate is ≤0.3%, so it is not prone to warping or deformation under temperature and humidity changes, preventing finishing materials from cracking or hollowing due to the underlayment's own deformation.
Balanced Flexural and Compressive Performance
With a flexural strength of ≥8MPa and compressive strength of ≥25MPa, it can both bear the weight of finishing materials and loads from above (such as furniture and personnel activities) and buffer stress caused by slight settlement of the base. It is especially suitable as an underlayment for solid wood floors, composite floors, and other materials with high requirements for base stability.
Moisture and Water Resistance, Protecting the Floor System
Low Water Absorption and Impermeability
The water absorption rate of MgO board subfloor underlayment is usually ≤12%, and the strength attenuation rate after water absorption is ≤10%. In humid environments (such as bathrooms, kitchens, and underground garages), it can effectively block water vapor from penetrating into the structural base, preventing concrete moisture regain, steel bar corrosion, and avoiding deformation and mildew of finishing materials (such as wooden floors) due to dampness.
Resistance to Efflorescence and Chemicals
By adding anti-efflorescence agents such as phosphate esters and oxalic acid, it inhibits the free precipitation of magnesium chloride inside the board, avoiding "whitening" (efflorescence) on the surface in high-humidity environments and ensuring that the bonding force of the finish is not affected. In addition, its inorganic components have certain corrosion resistance to common acid-base cleaning agents, cement paste, etc., extending the service life of the underlayment.
Fire Resistance and Flame Retardancy, Enhancing System Safety
As an inorganic mineral-based material, MgO board base underlayment is a Class A non-combustible material. It does not burn or release toxic fumes in high-temperature environments, only undergoing physical softening. When used in high-rise buildings, commercial places, or areas with fire protection requirements (such as power distribution rooms and data centers), it can be combined with fire-resistant floors and flame-retardant adhesives to form a continuous fire barrier, slowing down the spread of fire to the base and improving the fire safety level of the entire floor system.
Sound Insulation and Shock Absorption, Optimizing Living Experience
Inherent Sound Insulation Performance
With a density of 0.8-1.0g/cm³, the board's internal porous structure and fiber-reinforced layer can effectively absorb impact sound waves (such as footsteps and falling objects), with an airborne sound insulation index of ≥30dB. This reduces noise transmission between floors, making it particularly suitable for residences, hotels, and other scenarios with high sound insulation requirements.
Compatibility with Shock-Absorbing Materials
Its flat surface and certain elasticity allow it to be used in combination with EVA shock-absorbing pads, rubber sound insulation pads, etc., further enhancing sound insulation effects and meeting the acoustic design standards of high-end buildings.
Convenient Construction, Adapting to Various Processes
Lightweight and Easy Processability
A single board with a thickness of 5-12mm weighs only 3-8kg/m², making handling and laying labor-saving and reducing construction intensity. The board can be quickly processed with ordinary woodworking tools (saw, cut, nail), facilitating cutting into special-shaped sizes to fit corners such as pipes and columns, thus improving construction efficiency.
Diversified Fixing Methods
It supports various installation methods such as adhesive bonding and mechanical nailing (such as pneumatic nails and self-tapping screws), and has strong bonding force with concrete, steel structures, wooden boards, and other bases (bonding strength ≥0.5MPa), requiring no complex pre-treatment and shortening the construction period.
Environmental Protection and Harmlessness, Compatible with Healthy Scenarios
No Release of Harmful Substances
Made from natural minerals such as magnesium oxide and magnesium chloride, no toxic additives like formaldehyde or phenol are used in the production process. The formaldehyde emission of the finished product is ≤0.05mg/m³ (far lower than the national standard GB 18580-2017 of 0.124mg/m³), and there are no radioactive substances, making it directly applicable to sensitive areas such as residences, hospitals, and schools.
Resistance to Insects, Moths, and Mildew
It contains no organic nutrients such as cellulose, naturally resisting termites and moth erosion, and is not prone to mold growth. This avoids damage to the underlayment caused by insects or mildew, reducing later maintenance costs.
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What Is Magnesium Oxide Board Subfloor Underlayment Made Of
Fireproof MgO (Magnesium Oxide) wallboard is primarily composed of magnesium oxide, a compound derived from magnesium chloride and calcium carbonate. The magnesium oxide is combined with other natural materials such as fiberglass or wood fibers to enhance its structural properties.
These ingredients are mixed with water to form a slurry, which is then poured into molds and pressed into sheets. After drying, the sheets are cut to size and finished with a protective coating to improve their durability and appearance. The resulting product is a lightweight, yet highly fire-resistant building material that offers excellent thermal and acoustic insulation properties.
How does Magnesium Oxide Board Subfloor Underlayment contribute to fire safety
Fireproof Mgo Wallboard, also known as Magnesium Oxide Wallboard, contributes to fire safety in several ways
Non-Combustible Material: Mgo Wallboard is made from magnesium oxide, which is a non-combustible material. It does not burn or support combustion, making it resistant to fire.
High Fire Resistance Rating: Mgo Wallboard has a high fire resistance rating, typically ranging from 1 to 4 hours, depending on its thickness and composition. This means it can withstand exposure to fire for a longer duration without losing its structural integrity.
Slow Heat Transfer: Mgo Wallboard has low thermal conductivity, which means it transfers heat slowly. This property helps in preventing the spread of fire to adjacent areas, as it does not easily transmit heat.
Reduced Smoke Generation: During a fire, Mgo Wallboard produces significantly less smoke compared to other building materials. This is important for fire safety as smoke inhalation is a major cause of fatalities in fires.
Structural Stability: Mgo Wallboard is strong and durable, even at high temperatures. It does not lose its strength or structural stability when exposed to fire, which helps in maintaining the integrity of the building during a fire incident.
Fire Barrier And Compartmentation: Mgo Wallboard is commonly used in fire-resistant walls, ceilings, and partitions to create fire barriers and compartmentalize different areas of a building. These barriers help contain fire within a specific area, limiting its spread and providing occupants with more time to evacuate safely.
Fireproof MgO wallboard performs well in terms of sound insulation due to its dense and solid structure. The incorporation of materials like fiberglass or wood fibers within the MgO matrix adds to its mass and rigidity, both of which are key factors in enhancing sound transmission loss. Sound waves travel through materials by causing particles to vibrate; denser materials absorb these vibrations more effectively, reducing the amount of sound that passes through.
The effectiveness of MgO wallboard in sound insulation is further enhanced by its ability to dampen vibrations. The inherent properties of magnesium oxide, along with the reinforcing fibers, help to dissipate the energy of sound waves, preventing them from being transmitted through the material.
Moreover, the thickness and installation method can significantly impact the sound insulation performance of MgO wallboard. Thicker panels generally provide better sound insulation than thinner ones. When installed with additional layers of insulation or used in combination with other sound-absorbing materials, MgO wallboard can achieve even higher levels of sound attenuation.
How Does Fireproof Mgo Wallboard Perform In Terms Of Load-Bearing Capabilities
Fireproof MgO wallboard, also known as magnesium oxide board, typically exhibits good load-bearing characteristics due to its composition and manufacturing process. The material is inherently strong and rigid, thanks to the high compressive strength of magnesium oxide and the reinforcing agents often incorporated into the board, such as fiberglass or other fibrous materials.
The structural integrity of Fireproof MgO wallboard is influenced by several factors:
Magnesium Oxide Compressive Strength: Magnesium oxide itself has a high compressive strength, which means that when used in board form, it can withstand considerable loads without significant deformation or failure.
Reinforcement Materials: Fiberglass and wood fibers are commonly added to MgO boards to improve tensile and shear strengths. These materials help distribute stress across the board, making it more resistant to bending and cracking under load.
Board Thickness: Thicker boards generally have greater load-bearing capacity than thinner ones. Increasing the thickness of the board enhances its ability to support weight without damage.
Panel Size and Spacing: The dimensions and spacing of the wallboard panels can also affect their load-bearing performance. Properly aligned and spaced panels can work together to support greater loads than individual panels.
Fastening Methods: How the wallboard is attached to the supporting structure plays a crucial role in its load-bearing capabilities. Using the correct type and number of fasteners, such as screws or bolts, ensures that the load is evenly distributed and securely supported.
Supporting Structure: The strength of the underlying framing or studs is essential for load-bearing applications. Adequate spacing and sizing of the studs will ensure that the wallboard system functions effectively under load.
Can Magnesium Oxide Board Subfloor Underlayment Be Used In High-Humidity Areas, Such As Bathrooms
Fireproof MgO wallboard is suitable for use in high-humidity areas, including bathrooms, due to its moisture-resistant properties. Magnesium oxide (MgO) is hygroscopic, meaning it can absorb moisture from the air, but it also has the ability to release that moisture back into the environment once the conditions become less humid. This characteristic helps to regulate humidity levels within the room, which is beneficial in bathrooms where steam and water vapor are common.
Additionally, the manufacturing process of Fireproof MgO wallboard often includes measures to enhance its resistance to water and moisture. The board may be treated with sealants or protective coatings that inhibit the absorption of water, preventing warping, swelling, and deterioration that could occur with other materials in moist environments.
The inherent stability of Fireproof MgO wallboard also means it is less likely to crack or delaminate when exposed to fluctuations in temperature and humidity. This makes it an ideal choice for bathrooms where such conditions are expected.
It is important to ensure proper installation to maintain the integrity of the wallboard in high-humidity areas. This includes using appropriate waterproofing membranes behind the wallboard and ensuring that all seams and penetrations are properly sealed to prevent moisture ingress. Additionally, ventilation should be adequate to reduce the risk of condensation buildup, which can compromise the longevity of any building material.
How Does Magnesium Oxide Board Subfloor Underlayment Perform In Terms Of Thermal Insulation
Fireproof MgO wallboard has moderate thermal insulation properties compared to traditional materials like foam insulators or certain types of fiberglass. The thermal conductivity of magnesium oxide is relatively low, which contributes to its ability to resist heat transfer. This property allows MgO wallboard to slow down the movement of heat through a building's structure, providing some level of thermal insulation.
The thermal performance of Fireproof MgO wallboard can be influenced by several factors:
Density: Denser wallboards tend to have lower thermal conductivity, thus offering better insulation. However, the density also affects the weight and cost of the material.
Thickness: Thicker wallboards provide increased insulation because they offer more resistance to heat flow. The thickness needed to achieve desired thermal insulation levels will depend on the climate and the specific insulation requirements of the building.
Installation: Proper installation techniques can maximize the thermal performance of MgO wallboard. For example, gaps between boards should be filled to prevent heat from bypassing the insulation.
Additional Insulation Layers: To improve thermal insulation, MgO wallboard can be combined with other insulating materials, such as mineral wool or foam insulation boards. This layered approach can significantly enhance the overall R-value (a measure of thermal resistance) of the wall assembly.
Surface Treatments: Certain surface treatments or finishes applied to the MgO wallboard can also affect its thermal performance. Reflective coatings, for instance, can help to reflect heat away from the wall, thereby improving insulation during hot weather.
Fireproof Mgo Wallboard, or Magnesium Oxide Wallboard, is primarily designed and used as a non-structural building material. It is commonly used as an interior wall covering or ceiling board in construction projects. While it does offer fire resistance and other benefits such as moisture resistance and mold resistance, it is not typically intended for use as a load-bearing or structural element in construction.
For structural elements in construction, materials such as steel, concrete, and timber are commonly used. These materials possess the necessary strength and load-bearing capabilities to support the weight and structural requirements of a building.
It's important to consult with a qualified structural engineer or building professional to ensure that the appropriate materials are selected and used for structural elements in construction projects.
What Type Of Fire Testing Has Been Conducted On Magnesium Oxide Board Subfloor Underlayment
There are several types of fire testing that have been conducted on Fireproof Mgo Wallboard, 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 Does Magnesium Oxide Board Subfloor Underlayment Provide Fire Resistance
Fireproof Mgo wallboard provides fire resistance through its unique composition and manufacturing process.
Magnesium Oxide (MgO): The primary component of fireproof Mgo wallboard is magnesium oxide, which is highly fire-resistant. MgO has a high melting point and does not release any toxic gases when exposed to fire.
Reinforcement: Fireproof Mgo wallboard is reinforced with various materials like fiberglass mesh or cellulose fibers. These reinforcements enhance the strength and fire resistance of the wallboard.
Non-combustible: Mgo wallboard is non-combustible, meaning it does not burn or support the spread of fire. When exposed to high temperatures, it does not ignite, emit flames, or produce smoke.
High Thermal Resistance: Fireproof Mgo wallboard has excellent thermal resistance properties. It can withstand high temperatures without deforming or losing its structural integrity, providing a barrier against the spread of fire.
Low Thermal Conductivity: Mgo wallboard has low thermal conductivity, which means it does not transfer heat easily. This property helps prevent the rapid spread of heat from one side of the wallboard to the other, allowing it to act as a fire-resistant barrier.
Intumescent Properties: Some fireproof Mgo wallboards are designed with intumescent additives. When exposed to heat, these additives expand and form an insulating layer, further enhancing the fire resistance of the wallboard.
Is Magnesium Oxide Board Subfloor Underlayment Available In Different Sizes And Thicknesses
Fireproof MgO wallboard is indeed available in various sizes and thicknesses to accommodate different construction needs. Standard sheet sizes often mirror those of other common building materials for ease of installation and compatibility with standard framing systems. Common sizes include 4 feet by 8 feet (1220 mm by 2440 mm), although other sizes, such as 4 feet by 10 feet (1220 mm by 3050 mm) or custom sizes, may be available depending on the manufacturer and the specific requirements of a project.
Thickness options for Fireproof MgO wallboard can range from about 1/4 inch (6 mm) up to 1 inch (25 mm) or more. The thickness chosen will depend on the application, with thicker boards generally offering better fire resistance, soundproofing, and structural support. For example, a 1/2-inch (12.5 mm) board might be used for interior partitions in commercial buildings, while a thicker 5/8-inch (15.9 mm) board would be more suitable for fire-rated walls and ceilings.
It is crucial to check with manufacturers or suppliers for the specific size and thickness options they offer, as these can vary. Additionally, local building codes and regulations may dictate the minimum fire rating and thickness required for certain applications, so it is important to select a product that meets these requirements.
How Is Magnesium Oxide Board Subfloor Underlayment Installed
Fireproof Mgo wallboard, also known as Magnesium Oxide board, is typically installed using the following steps:
Preparation: Before installation, ensure that the surface where the Mgo wallboard will be installed is clean, dry, and free of any dust or debris. Additionally, make sure to measure and mark the exact location where the boards will be installed.
Cutting: Use a circular saw or a utility knife to cut the Mgo wallboard to the desired size. Make sure to take accurate measurements and wear appropriate safety gear, such as gloves and goggles, during the cutting process.
Application: Apply a layer of adhesive or mortar to the backside of the Mgo wallboard using a trowel or a notched trowel. Make sure to spread the adhesive evenly across the entire back surface.
Placement: Press the Mgo wallboard firmly against the wall surface, ensuring that it is aligned properly with the marked location. Apply pressure to the board to ensure good adhesion and remove any air bubbles.
Fastening: Secure the Mgo wallboard to the wall using screws or nails. The specific fastening method may vary depending on the manufacturer's instructions and the desired level of durability. Generally, screws or nails should be placed around the board's edges and spaced at regular intervals.
Finishing: Once the Mgo wallboard is securely fastened, fill any gaps or joints with joint compound or spackling paste. Smooth out the compound using a putty knife and let it dry completely. Sand the surface lightly to achieve a smooth finish.
Priming And Painting: After the joint compound has dried and been sanded, apply a primer coat to the Mgo wallboard. Once the primer is dry, paint the wallboard with the desired color using a roller or brush. Apply multiple coats if necessary, allowing each coat to dry before applying the next.
How Does Magnesium Oxide Board Subfloor Underlayment Compare To Other Fire-Resistant Building Materials
Fireproof MgO wallboard, composed primarily of magnesium oxide, offers several advantages when compared to other fire-resistant building materials, particularly in terms of fire resistance, environmental impact, and physical properties. Here's a comparison:
Fireproof MgO Wallboard: Typically provides excellent fire resistance due to the non-combustible nature of magnesium oxide. It can withstand high temperatures and does not emit toxic fumes when exposed to fire.
Gypsum Wallboard: Also fire-resistant, gypsum board contains water molecules that are released when heated, helping to suppress flames. However, at very high temperatures, gypsum can dehydrate and lose its fire-resistant properties.
Fiber Cement Board: Offers good fire resistance and is non-combustible. It can withstand heat and does not contribute to the spread of fire.
Steel Framing: Extremely fire-resistant, steel maintains its strength until it reaches melting point; however, it can become weakened by excessive heat over time.
Fireproof MgO Wallboard: Generally considered more eco-friendly than many alternatives because it uses natural materials and can be recycled. It also releases fewer volatile organic compounds (VOCs) during production and installation.
Gypsum Wallboard: Can be considered environmentally friendly since it is made from a naturally occurring mineral. Gypsum can be recycled and reused.
Fiber Cement Board: Contains cement, which has a higher carbon footprint than magnesium oxide or gypsum. However, it can still be a more sustainable option than some other materials.
Steel Framing: Recyclable and has a lower carbon footprint compared to materials like concrete or timber. However, the production of steel requires significant energy.
Fireproof MgO Wallboard: Strong and durable, with good impact and puncture resistance. It is also moisture-resistant and Not susceptible to moisture.
Gypsum Wallboard: Less robust than MgO board, prone to damage from impacts and moisture. It is suitable for interior applications but not for areas exposed to high humidity or wet conditions.
Fiber Cement Board: Very strong and durable, with excellent weather resistance and dimensional stability. It is suitable for both indoor and outdoor use.
Steel Framing: Highly durable and strong, with excellent load-bearing capabilities. Steel is resistant to termites, rot, and warping.
Fireproof MgO Wallboard: Similar to gypsum board in terms of installation, using screws or nails to attach to framing. Requires minimal maintenance.
Gypsum Wallboard: Easy to install with joint compound and tape. Regular cleaning and painting are needed to maintain appearance and protect against moisture damage.
Fiber Cement Board: More challenging to install due to its rigidity and heavyweight. It requires cutting with specialized saws. Minimal maintenance is needed once installed.
Steel Framing: Installation requires expertise to ensure proper alignment and secure fastening. Once installed, steel framing requires little maintenance.
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 fireproof Mgo wallboard provide fire resistance?
Q: What are the advantages of using fireproof Mgo wallboard?
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?
Q: Can fireproof Mgo wallboard be used for soundproofing purposes?
Q: How does fireproof Mgo wallboard perform in terms of impact resistance?
Q: Is fireproof Mgo wallboard resistant to termites or other pests?
Q: Can fireproof Mgo wallboard be used as a structural element?
Q: What is fireproof Mgo wallboard?
Q: Can fireproof Mgo wallboard be used in high-temperature environments?
Q: What sizes and thicknesses are available for fireproof Mgo wallboard?
Q: Is fireproof Mgo wallboard resistant to UV radiation?
Q: Can fireproof Mgo wallboard be installed on curved surfaces?
Q: How does the cost of fireproof Mgo wallboard compare to other building materials?
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