Magnesium oxide (MgO) panels are advanced, cement-based sheathing products composed of magnesium oxide cement, fiberglass reinforcement, and other ingredients. Unlike some traditional sheathing products, MgO panels are free from toxic compounds such as heavy metals, crystalline silica, and formaldehyde-based resins. Designed to replace conventional materials such as gypsum board, plywood, and Portland cement sheathing, MgO panels offer enhanced performance across a range of environmental and structural metrics.
Why Choose MgO Panels?
MgO panels have gained traction across residential, multifamily, and commercial sectors thanks to their strong performance in the following areas:
1. Durability
Dense and abuse-resistant, MgO panels are built to endure the rigors of transport and on-site handling. They resist cracking, chipping, and damage during construction.
2. Dimensional Stability
Unlike wood or gypsum-based products, MgO panels resist warping, swelling, and delamination – even in high humidity and during high temperature fluctuations.
3. Non-Toxic Composition
Free from harmful chemicals like heavy metals, arsenic, formaldehyde-based resins, and other anti-microbial additives, MgO panels are safe to cut and handle when installing and support healthy indoor air quality.
4. Crystalline Silica-Free
MgO panels contain minimal to no crystalline silica, meaning they are worker-friendly and safe to cut without risk of breathing in harmful materials.
Key Performance Advantages
Fire Resistance
With a majority of their weight consisting of non-combustible MgO cement and chemically-bound water molecules, MgO panels are ideal for buildings requiring enhanced fire safety – especially in wildfire-prone areas or code-regulated urban settings. Varieties of MgO panels are suitable for use in all construction types (I–V), helping to achieve fire ratings in exterior and interior assemblies.
Moisture Resistance
Capable of withstanding exposure to rain, snow, and freeze-thaw cycles for several months during construction, MgO panels are an excellent safeguard against weather-related delays. Even under harsh conditions, MgO panels will not swell or deteriorate like traditional sheathing products.
Structural Integrity
Structural-grade MgO panels rival the strength of OSB and plywood and outperform gypsum-based panels. A single ¾” MgO panel can replace multiple layers in traditional floor assemblies – streamlining labor and material costs.
Fungal Resistance
Thanks to their inorganic makeup, MgO panels resist mold and mildew growth, making them ideal for humid regions and moisture-prone applications such as bathrooms, kitchens, and basements.
Ease of Use
Despite their high durability, MgO panels remain manageable to install. They cut, drill, and fasten easily using standard tools and weigh similarly to conventional sheathing materials.
Product Sizing
Panel sizes are commonly 48” wide x 96” long and are available in thicknesses that include ¼” (6mm), ½” (12mm), and ¾” (19mm). Additional lengths and thicknesses are available. Panels are palletized and shipped via truck/trailer for streamlined jobsite delivery.
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