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Magnesium oxide board vs gypsum board

Magnesium Oxide (MgO) board and gypsum board are both commonly used in the construction industry, but they have distinct properties and benefits. Here's a comparison:





1. Material Composition:

- MgO board is primarily made of magnesium oxide, a type of mineral cement, and is mixed with fiberglass cloth, non-organic minerals, and other materials.

- Gypsum board, also known as drywall, is made from gypsum, a naturally occurring mineral, and is bound on both sides by paper.


2. Fire Resistance:

- MgO board has superior fire resistance. It is classified as a non-combustible material and doesn't produce smoke or propagate flames.

- While gypsum board is fire-resistant, it is less effective than MgO. As the gypsum board heats, the water vaporizes, slowing the spread of fire but eventually getting consumed.


3. Water and Moisture Resistance:

MgO board is highly resistant to water and moisture, making it less prone to mold and mildew growth. This is particularly beneficial in damp environments.

Gypsum board, especially the standard type, is susceptible to water damage and can support mold and mildew growth. However, specially designed moisture-resistant gypsum boards are available for use in high-humidity areas.


4. Impact and Durability:

- MgO board is generally more durable and impact-resistant than gypsum board, making it a good choice for high-traffic areas.

- Gypsum board is softer and more prone to damage from impact or heavy loads.


5. Pest Resistance:

- MgO board is resistant to pests like termites and rodents.

The gypsum board doesn't offer the same level of pest resistance.


6. Environmental Impact:

- MgO board is considered more environmentally friendly due to its durability, longer lifespan, and the ability to absorb CO2 during its production.

- Gypsum board, while recyclable, has a shorter lifespan and requires more energy-intensive processes to manufacture and recycle.


7. Installation and Cost:

Due to its hardness, a MgO board can be more challenging to install than a gypsum board and is generally more expensive. The Gypsum board is more accessible to cut and install and is usually more affordable.


In conclusion, the MgO board offers superior performance in terms of fire resistance, water resistance, and durability, but it is more expensive and may be more complex to install. The choice between MgO and gypsum board will depend on the project's specific needs, budget, and environmental considerations.


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