Improved Fire Safety and Water Resistance with MgO Structural Panels
From fire to mold – MgO exceeds expectations as a structural panel
Sponsored by TAMLYN
Magnesium Oxide (MgO) is a versatile chemical compound that is now being utilized by building product manufacturers to create structural panels. MgO panels are lightweight, cement-like materials and are a successful replacement for traditional structural panels. The enhanced fire-resistance qualities of the non-combustible material make them an ideal alternative to OSB. MgO panels are also water resistant and will not swell, deform or break down when exposed to water. When used in combination with water resistive barriers, MgO panels provide enhanced protection from the elements while contributing to the sustainability and durability of any building project.
TAMLYN is a family-owned company with 50 years in the building products industry and has placed a great deal of recent focus on building science, especially moisture management. This direction led to the development of their TamlynWrap® line, Drainable with its 1.5mm bonded filament creating an enhanced WRB, and RainScreen 6.3 (1/4”) and 10.1 (3/8”). TamlynWrap® RainScreen is a multi-layer water management system, intended for use over existing WRB or coated sheathing, of cavity spaces that are non-compressible and act as a furring matrix to promote enhanced drainage and drying, paired with improved installation efficiency.
Originally published in Architectural Record
Originally published in June 2025
LEARNING OBJECTIVES
- Explain the manufacturing process and common uses of Magnesium Oxide (MgO) as a versatile chemical compound.
- Describe how MgO is utilized in the manufacturing of structural panels and can be specified to help ensure the health, safety and well-being of occupants.
- List the fire-resistant attributes of MgO and how these non-combustible properties make it an ideal alternative to other materials.
- Discuss how MgO structural panels protect the building from water intrusion when installed with a weather resistive barrier and can help reduce the chance of mold growth and structural decay.
