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EXACOR™ Subflooring

EXACOR subfloor panels are fire-resistant[1], high-density, structural magnesium oxide cement panels. When used as a subfloor, EXACOR™ panels can replace plywood and/or OSB subflooring in certain assemblies and can remove the need for gypsum underlayment.

  • Subflooring Panel, 3/4" × 4' × 8'

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01 Products

Subflooring Panel, 3/4" × 4' × 8'

Panels Per Unit 22
Fire Resistant E84
Fire-Resistant Assemblies
(UL 263)
L601, L602

Performance Category

Panel Size

Edge Profile

Fire-Resistant Assemblies (UL 263)

Approx. Weight Per Panel

Panels Per Unit

Nominal 3/4" Thickness (20 mm)Nominal 4' × 8' (1220 mm × 2440 mm)Shiplap

L601, L602

144 lbs.22

02 What Is MgO

Magnesium oxide (MgO) offers simple strength and streamlined installation for a building panel with exceptional workability.

MgO panels are made primarily from MgO and added compounds and are similar to a cement panel product. When the MgO panels are formed, a controlled chemical reaction takes place that allows the boards to become solid. The result is a streamlined solution with sound, fire and strength benefits.

Learn More About MgO

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  • Speed & Ease of Installation

    Installs with just a single trade and can eliminate the need for gypsum underlayment.

  • Sound Absorption

    Can help achieve sound ratings when used as a part of a STC/IIC-tested floor/ceiling assembly.

  • Fire Resistance[1]

    Provides fire resistance as part of fire-resistance-rated floor/ceiling assemblies.

  • Dimensional Stability

    Withstands exposure to moisture and does not warp, expand, cup or delaminate like other (wood) panels do.

  • Inherent Strength

    Contains a proprietary layered mesh reinforcement for added structural value.

  • Quality Assurance

    Manufactured under a quality control program with inspections by ICC-ES and Underwriters Laboratory (UL) to ensure consistent product performance.

  • Optimize Material & Labor Costs

    High-performing and time-saving material that can help reduce materials and trades needed to install.

05 Warranty

Warranty Information

See our 10-Year Limited Warranty. Limitations and restrictions may apply.

View Warranty