Magnesium Oxide Panels: Key Benefits, Risks, and Smart Selection Guide

Suppose you are specifying wall sheathing for a three-story multifamily building with a fire-resistance requirement and a schedule that leaves the framing expo...

Magnesium Oxide Board: Properties, Applications, and What Specifiers Should Verify

A regional builder is reviewing a material submittal for a four-story, wood-frame apartment project. The architect has specified magnesium oxide board for exte...

MgO Wall Sheathing Board: Fire-Rated Structural Panel for Exterior Walls

Exterior wall sheathing has to survive two enemies at once: fire and moisture. Paper-faced gypsum sheathing resists fire, but it swells, wicks water and grows ...

MGO Wall Board: Sulfate vs Chloride, Fire Ratings, and Installation Basics

A contractor in a coastal county pulled the siding off a three-year-old house and found the gypsum sheathing soft, dark, and covered with mold. The paper facer...

Magnesium Oxide Wall Sheathing Board: Fire Ratings, Moisture Resistance, and Selection

A framing crew on a coastal project installed magnesium oxide wall sheathing board in early spring. After two months of rain, the panels wept moisture around s...

Magnesium Oxide Panels: Benefits, Uses, and Installation Guide

A standard ½-inch magnesium oxide panel achieves a flame spread index of 0 and a smoke developed index of 0 under ASTM E84. The board itself contributes zero f...