Engineered Systems

Home / Building Envelope / Exterior Structural Sheathing (MgO)

Get in Touch

You have questions? We have answers.

Exterior Structural Sheathing (MgO)

Description
  • High-impact resistance and structural support.
Uses
  • Exterior/Interior Sheathing
  • Underlayment
  • SIP Skins
Replaces
  • OSB/Plywood
  • Engineered Wood Sheathing
  • Other Structural Panelized Wall Sheathing Products
Key Advantages
  • Enhanced Safety: Eliminates flammable materials.
  • Ease of Use: Facilitates efficient installation.
  • Long-Lasting Durability: Sturdy, low-maintenance solution.
  • Versatile Application: Suitable for various sheathing needs.
Physical Specifications
  • Thicknesses: ½” (12mm), 5/8” (16mm).
  • Dimensions: 4′ x 8′, 4′ x 10′, 4′ x 12′.
  • Weight:
    • 1/2″ – 2.83 lbs/sq ft
    • 5/8″ – 3.77 lbs/sq ft
  • Edge Treatments: Square
Code Compliance
  • ICC ESR-5193
  • Chicago Building Code Supplement.
  • Los Angeles County Building Code Supplement, Commercial and Residential.
  • California Building Code Supplement, Commercial and Residential.
  • Florida Building Code Supplement, Commercial and Residential.
  • Florida Product Approval for use on SIPs.
  • Certified for use on Wood, Light Gauge Steel, and Mass Timber Floor Applications.
  • 2021, 2018, and 2015 International Building Code®
  • 2021, 2018, and 2015 International Residential Code.
  • ICC-ESL 1568 for Fire Rated Assemblies.
  • Non-Combustible: ASTM E-136 rating, as referenced by the 2024 IBC and 2024 IRC .
  • ASTM E84 Flame Spread 0, Smoke Developed 0
  • AC 386, AC 269.1, AC 269.2, AC 376, AC 378 Fiber Reinforced MgO Sheathing.
  • E119/UL 263 One- and Two-Hour Fire Rated Assemblies.
  • NFPA 285
  • International Wildland Urban Interface Code (IWUIC).

Additional Product Information


MgO vs. OSB - Burning Down the House