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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 instances 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 Why It Works

  1. A Simple Solution for Sound Control

    EXACOR subfloor panels have been shown to achieve or exceed code minimums for STC/IIC ratings for dwellings with a single-layer application when used as part of certain tested floor/ceiling assemblies.

  2. Installation Speed & Ease

    Unlike gypsum underlayment, EXACOR subfloor panels do not require a cure time that can slow or halt construction progress.

  3. High Quality

    Manufactured in a quality-controlled environment to maintain product consistency you can depend on.

04 Warranty

Warranty Information

See our 10-Year Limited Warranty.

View Warranty