Fireproof Roof Sheathing

Magnesium Oxide Board (MgO board) is widely used in construction as a fireproof roof sheathing due to its excellent fire performance. Below is a detailed introduction to its main characteristics and application advantages.

 

1. Fundamental Fire-Resistant Properties

Class A Non-Combustible Material: According to the GB8624-2012 standard, magnesium oxide board is classified as an A1-class non-combustible material. This means it will not burn under high temperatures and will not produce toxic smoke or contribute to flame spread.

High Fire Resistance Rating: Different thicknesses of magnesium oxide board provide varying fire resistance durations. For example, a 9mm thick board, when used in conjunction with an appropriate framing structure, can achieve a fire resistance rating of over one hour. A 12mm thick board may offer more than two hours of fire protection.

 

2. Specific Fire Performance

Flame Spread Index (FSI) and Smoke Developed Index (SDI): These two indicators are crucial for assessing the fire performance of building materials. High-quality magnesium oxide board typically has an FSI of ≤25 and an SDI of ≤450 in the ASTM E84 test, indicating extremely low flame propagation speed and smoke generation.

Thermal Stability: Magnesium oxide board remains stable at temperatures as high as 1200°C, without softening or decomposing, effectively preventing the spread of fire from one floor to another or to adjacent buildings.

 

3. Physical and Chemical Properties

Lightweight and High Strength: The apparent density of magnesium oxide board is 0.8-1.35 g/cm³, which reduces the building load and increases usable space. Its flexural strength (MOR) is greater than 16 MPa (for a 9mm thickness), impact strength is greater than 5.5 kJ/m², and screw withdrawal strength is ≥15 N/mm. These performance indicators enable it to effectively bear loads and provide a solid base.

Environmentally Friendly and Harmless: Magnesium oxide board contains no asbestos, formaldehyde, benzene, or harmful radioactive elements. It produces no smoke, is non-toxic, and odorless when exposed to fire. The materials used in production are natural mineral powders and plant fibers, with a natural curing process that consumes little energy and produces no pollutants, making it energy-efficient and environmentally friendly.

 

4. Comparison with Other Materials

Wooden Materials: Even fire-retardant treated wood is difficult to avoid burning under fire conditions and will release large amounts of harmful gases.

Fiber Cement Boards: Although they have good fire performance, they may develop cracks or spalling under extreme high temperatures, affecting the overall fire protection effectiveness.

 

Summary

Magnesium oxide board plays a significant role in enhancing building safety due to its superior fire performance, good physical and mechanical properties, and environmental characteristics. It is particularly suitable for fire protection sheathing in commercial buildings, public facilities, and residential projects with strict fire requirements. However, in practical applications, it is essential to follow relevant standards and guidelines to ensure that its fire protection functions are fully realized.

 

Applicable Scenarios:

 

Firewalls in High-Rise Buildings: Due to its excellent fire performance, magnesium oxide board is ideal for firewalls in high-rise buildings.

 

Fire Barriers in Industrial Plants: In industrial environments, magnesium oxide board can provide effective fire barriers, protecting equipment and personnel.

 

Home Renovation Fire Protection: In home renovations, especially around kitchens and fireplaces where fire protection is needed, magnesium oxide board is an ideal choice.

 

In summary, magnesium oxide board not only excels in fire performance but also offers significant advantages in environmental friendliness and durability, making it an ideal fire protection material in modern construction.

 

Parameter

Main Materials	MgO, MgCl2/MgSO4, Glass fiber Mesh
Fire Performance	Non-combustible, No flame spread, No smoke spread,No poisonous gas
Density	1-1.2kg/m3,
Flexural Strength	16-40Mpa
Impact Strength	≥3.5 kJ/m2
Moisture Content	≤8%
Shrinkage	≤0.3%
Swelling	≤0.3%
Screw Holding Capacity	50-100/(N/mm)
Leachable Chloride	0.1%(MOS),3%(MOC)
Edge	Square/T&G/Tapered/Beveled
Thickness	12-16mm
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

 

Advantage

- Non-combustible. Zero flame spread. Zero smoke generation.

- Resistant to water damage, ideal for coastal conditions.

- High strength and impact resistance.

- Green and environmentally friendly production.

- Non-toxic: No VOC's, formaldehyde, glues, resins, asbestos or crystalline silica.

- Resistant to mold, rot and termites.

- Can be fastened with screws or a nail gun. Easy to cut and saw.

 

Factory

 

About Us

We specialize in quality control and consistency of MgO products. We have actively participated in the development of ASTM standards related to MgO products. We have joined hands with the China Magnesium Industry Association (CMMA), the Magnesium Oxide Building Products Association (MgOBPA) of North America, and the Magnesium Oxide Association (MOCA) to jointly promote the popularization of magnesium oxide cement products in the construction sector.

 

Packing and Shipping

 

FAQ

Q:Can you make products as per our requests?

A:Of course, we accept OEM/ODM

Q:What is your payment term?

A:We arrange the production upon receiving your deposit by T/T.

 

Hot Tags: fireproof roof sheathing, China fireproof roof sheathing manufacturers, suppliers, factory, Fire Rated Roof Sheathing, Fire Rated Roofing Sheathing, Fireproof Roof Sheathing, Mgo Roof Sheathing, Impact Resistant Roofing, Fire Resistant Roof Sheathing