EXACOR™ Wall Sheathing
EXACOR wall sheathing panels are fire-resistant[1], high-density, structural magnesium oxide cement panels. When used as an exterior wall sheathing, EXACOR™ panels can replace other sheathing materials in certain assemblies, potentially reducing the number of layers required.
Limitations and restrictions apply to EXACOR™ sheathing used in exterior walls of Type III Construction that are greater than 40ft in height above grade plane. Please refer to ESL-1290 for more information on the use of EXACOR sheathing in NFPA 285 assemblies. EXACOR sheathing is not approved for use on Type I or II buildings except as noted in ESR 4635.
01 Products
Sheathing Panel, 5/8" × 4' × 8'
| Panel Count | 28 |
| Fire Resistance | ASTM E119, ANSI/UL 263 |
| Structural | ESR-4635 |
Sheathing Panel, 5/8" × 4' × 9'
| Panel Count | 25 |
| Fire Resistance | ASTM E119, ANSI/UL 263 |
| Structural | ESR-4635 |
Sheathing Panel, 5/8" × 4' × 10'
| Panel Count | 24 |
| Fire Resistance | ASTM E119, ANSI/UL 263 |
| Structural | ESR-4635 |
Sheathing Panel, 1/2" × 4' × 8'
| Panel Count | 38 |
| Fire Resistance | ASTM E119, ANSI/UL 263 |
| Structural | ESR-4635 |
Sheathing Panel, 1/2" × 4' × 9'
| Panel Count | 33 |
| Fire Resistance | ASTM E119, ANSI/UL 263 |
| Structural | ESR-4635 |
Sheathing Panel, 1/2" × 4' × 10'
| Panel Count | 32 |
| Fire Resistance | ASTM E119, ANSI/UL 263 |
| Structural | ESR-4635 |
| Nominal Product Thickness | Nominal Panel Size | Panel Count | Weight (lbs./sq. ft.) | Max Support Spacing | Edge/Field Spacing[4] | Maximum Allowable Shear Values (plf)[5] [6] [7] [8] [9] [10] | Transverse Wind Loads (psf)[7] [8] [11] | Fire-Resistance-Rated Assemblies[12] | Code Evaluation Report |
|---|---|---|---|---|---|---|---|---|---|
| 1/2" (12 mm) |
4' × 8' 4' × 10' |
38 33 32 |
2.7 | 24" | 4/6" | 230 | +/-38 | 1-Hour Exterior Load-Bearing Wall ESL 1290 |
ESR 4635 |
| 5/8" (16 mm) |
4' × 8' 4' × 9' 4' × 10' |
28 25 24 |
3.3 | 24" | 4/6" | 220 | +/-68 | 2-Hour Exterior Load-Bearing Wall ESL 1290 |
ESR 4635 |
02 What Is MgO
Magnesium oxide (MgO) offers simple strength and streamlined installation for a building panel with exceptional workability.
MgO panels are cementitious panels that are primarily made of inorganic materials reinforced with layers of glass fiber mesh. EXACOR™ MgO panels are manufactured to provide a streamlined solution for strength, fire resistance and sound performance.
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Fire Resistance[1]
Provides fire resistance as part of fire-resistance-rated floor/ceiling assemblies.
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Dimensional Stability
Withstands exposure to moisture and does not warp, expand, cup or delaminate like other (wood) panels do.
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Inherent Strength
Contains a proprietary layered mesh reinforcement for added structural value.
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Quality Assurance
Manufactured under a quality control program with inspections by ICC-ES and Underwriters Laboratories (UL) to ensure consistent product performance.
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Optimize Material & Labor Costs
High-performing material that may save time and help reduce materials and trades needed to install.
03 Documents
Resource Library
04 Warranty
Enhanced Experience
If you’re building a multifamily or light commercial project, register your project and complete a preconstruction meeting to access the full range of technical support and warranty benefits for your build, including a transferrable warranty. Review full warranty details and access project registration at the link below.
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05 News & Articles
Behind the Build Blog
Time to Get Started: EXACOR™ MgO Panels Are Available and Ready for Your Job
Where to find EXACOR™ MgO Panels
Read MoreHow TDK Construction Saves Time and Money with EXACOR™ MgO Panels: Getting in on the Ground Level
TDK Construction agrees using EXACOR MgO panels equated to real time savings in a recent luxury apartment community project.
Read MoreOA Showcase Home Creates Resilient Design with ZIP System® R-Sheathing
Project giving new life to 1920s-era Minneapolis home
Read MoreQ&A on Continuous Insulation with Green Builder Carl Seville
Carl Seville of SK Collaborative shares his thoughts on the building envelope and the role ZIP System® R-sheathing plays for managing air and thermal bridging.
Read MoreHow to Build a Huge Custom Home with a Continuous Air and Water Barrier
Kentucky-based Atchison Heller goes full fluid-applied flashing for a 13,000-square-foot custom home to achieve a super air- and water-tight building enclosure.
Read MoreFighting Moisture During Renovation and Restoration
Long Island-based builder Paul Patera discusses how he uses ZIP System sheathing and tape for both renovation and restoration projects.
Read More