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How MgO Boards Revolutionize Exterior Sheathing: A Comprehensive Guide

The continuous evolution of the construction industry has witnessed the emergence of innovative solutions. Magnesium Oxide (MgO) boards are one such development that has significantly altered the landscape of exterior sheathing.

The increasing usage of MgO boards in construction can be attributed to their numerous advantages over traditional exterior sheathing materials. This detailed guide will explore how MgO boards are revolutionizing the exterior sheathing process and provide a comparative overview with other materials.

What Are MgO Boards?

MgO boards are a type of sheathing material made from Magnesium Oxide, a mineral cement comprised of magnesium, oxygen, and other components. When mixed with water and certain additives, it forms a versatile building material that has been gaining popularity in the construction sector due to its excellent fire resistance, durability, mold and pest resistance.

The Proliferation of MgO Boards: Understanding the Benefits

1. Fire Resistance

One of the defining features of MgO boards is their unparalleled fire resistance. MgO is a non-combustible material that can endure extremely high temperatures without burning or producing smoke. The boards have a flame-spread index of zero, meaning they do not contribute to fire propagation, making them a safer alternative for construction, particularly in fire-prone regions.

2. Mold & Pest Resistance

Unlike many traditional materials, MgO boards do not encourage the growth of mold, mildew, or pests. The alkaline nature of MgO is not conducive to these organisms, which is a significant advantage over materials like wood and gypsum that often experience such problems. This resistance to infestations and fungi growth leads to decreased long-term maintenance expenses.

Magnesium Oxide Board

3. Durability and Strength

MgO boards are acclaimed for their remarkable durability and strength. The boards showcase superior impact resistance and are less likely to warp, crack, or deteriorate over time. This makes them a prime choice for structures in regions with harsh weather conditions, such as high humidity or intense heat.

4. Environmental Impact

MgO boards are considered a more environmentally friendly choice compared to many other construction materials. The production process is energy-efficient, the boards are recyclable, and their longevity reduces the need for replacement. This addresses the growing global focus on sustainable and eco-friendly construction practices.

Comparative Analysis: MgO Boards Vs. Traditional Sheathing Materials

Exterior sheathing is a critical part of any construction project, responsible for the structure's stability, durability, and energy efficiency. Historically, the primary materials used for this process have been wood and gypsum. However, the advent of MgO boards has instigated a shift in this paradigm. To truly appreciate the revolutionary nature of MgO boards, it's essential to understand how they compare with traditional materials.

MgO Boards Vs. Wood

Wood has enjoyed widespread usage as a sheathing material due to its wide availability, ease of installation, and excellent thermal properties. However, wood has inherent flaws that can compromise the longevity and safety of a structure.

Fire Susceptibility

Wood is a combustible material. When subjected to high temperatures, it not only burns but also aids in fire spread. This attribute can exacerbate dangerous situations and cause substantial property damage. In contrast, MgO boards are non-combustible, exhibiting a flame-spread index of zero. This means they won't burn or aid in fire propagation, significantly reducing fire-related risks.

Pests and Mold Issues

Wood's organic nature makes it a prime target for pests, such as termites, and a breeding ground for mold and mildew. These issues necessitate periodic maintenance, increasing long-term costs. On the other hand, MgO boards have a naturally alkaline composition that discourages pest infestations and mold growth, considerably reducing maintenance needs.


While wood can provide reasonable durability, it's subject to warping, cracking, and rotting over time due to environmental exposure. MgO boards, however, exhibit high impact resistance and minimal susceptibility to environmental wear and tear. This ensures a longer lifespan and enhanced structural integrity.

MgO Boards Vs. Gypsum

Gypsum boards, another common sheathing material, also exhibit notable deficiencies when compared to MgO boards.

Moisture Absorption

While gypsum boards are known for their fire-resistant properties, they have a high susceptibility to moisture absorption. This can lead to an increase in weight, compromising structural integrity and facilitating mold growth. MgO boards inherently resist moisture, minimizing the potential for mold and maintaining their structural integrity even in high-humidity environments.

Impact Resistance

Gypsum is a relatively soft material, prone to damage from physical impacts. This can lead to structural weaknesses over time, especially in high-traffic or extreme weather conditions. In stark contrast, MgO boards are known for their strength and robustness. They resist physical impacts much better than gypsum, ensuring a resilient and durable exterior sheathing.

Mag board panel

MgO boards are leading the way in revolutionizing exterior sheathing. Their myriad of benefits far outweigh those of conventional materials, positioning them as the material of the future for exterior sheathing.

As we continue to strive for safer, more durable, and sustainable construction practices, the impact and relevance of MgO boards will only continue to grow. It's not just a passing trend; MgO boards offer practical solutions that resonate with the future of sustainable construction. The future of construction is here, and MgO boards are a significant part of it.

So, if you're considering buying MgO boards at affordable pricing, MagMatrix Boards can help you. We are one of the top manufacturers and providers of Magnesium Oxide Boards. Our products are fire-resistant, extremely strong, environmental-friendly, and made from the highest-quality materials.

Our wide range of products includes MgO exterior sheathing board, magnesium oxide flooring, concrete subfloor panel, and a lot more. Get in touch with us today, and we will help you understand all about our MgO boards in detail.

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