Georgia-Pacific DryMax Moisture & Water-Resistant OSB Subfloor Plywood
Georgia-Pacific DryMax Subfloor Plywood, Moisture & Water-Resistant OSB

DryMax® High-Performance OSB Sub-Floor

  • The most moisture-resistant sub-floor GP manufactures
  • 500-day no sand warranty
  • Designed to reduce moisture-related issues such as thickness and edge swell
Our most moisture-resistant OSB performs in every way.

DryMax® High-Performance OSB is not only the most moisture-resistant OSB sub-floor Georgia-Pacific manufactures, it’s also designed to help prevent costly and time-consuming joint sanding. No wonder DryMax® High-Performance OSB carries a 500-day no-sand warranty. It’s performance you can count on – day in and day out.

Enhanced durability, nail-holding ability, stiffness and strength

Clear edge seal helps prevent moisture intrusion

Single-layer flooring panel for use under hardwood flooring and carpet and pad

$2 per sheet first time user rebate


Available Sizes (Sized for 4’ x 8’)
Square Edge

3’-11 7⁄8” (1.216 m) x 7’-11 7⁄8” (2.435 m)

Tongue & Groove

3’-11 1⁄2” (1.206 m) x 7’-11 7⁄8” (2.435 m)

Building Code Performance Categories, Panel Thickness
19/32 CAT

0.578” (14.68 mm)

23/32 CAT

0.703” (17.85 mm)

Length/Width Tolerance

±1⁄16” (±1.6 mm

Straightness Tolerance

±1⁄16” (±1.6 mm)

Squareness Tolerance

± 1/8” (± 3.2 mm)

Testing Agency

APA® – The Engineered Wood Association


Exposure 1 : OSB suitable for uses not permanently exposed to the weather. Panels classified as Exposure 1 are intended to resist the effects of moisture on structural performance as may occur due to construction delays, or other conditions of similar severity.

Code Fire Classification

Class III or C

Flame Spread Rating

76-200, smoke developed index <450

Building Code Compliance

PS 2-10

SFI Certified


Safety Data Sheets

Product FAQs

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