Plywood Grade Stamp Explained
The span rating indicates the maximum inches between supports (i.e. joist, truss etc) that the panel may be applied. If there are two numbers, the first refers to roof applications, the second to floor applications.
The Exposure Durability Classification defines whether the panel should be
used for interior or exterior applications:
- Exterior panels have a fully waterproof bond and are designed for
applications subject to permanent exposure to the weather or moisture. - Exposure 1 panels are designed for protected construction
and industrial applications and can be exposed to the elements for a short
time, but not permanently. - Exposure 2 panels are intended for protected construction
and industrial applications where the potential for conditions of high
humidity and water leakage exist. - Interior panels are manufactured with an interior grade
glue and are intended for interior applications only.
The thickness of the panel is also included on the stamp.
Installation Instructions
Consult with a professional installer, licensed contractor or, for detailed application and installation instructions, write to:
APA-The Engineered Wood Association
7011 S. 19th Street
Tacoma, WA 98466-5333
(253) 565-6600
www.apawood.org
Pine Finishing Recommendations
Prime and paint or use two coats of opaque (solid color) stain. Use acrylic
latex paint only; oil based paint is not recommended.
When used for an outdoor application, it is important to prime and paint all
exposed surfaces including edges.
IT IS RECOMMENDED THAT REPAIR WORK BE PERFORMED BY A
LICENSED PROFESSIONAL.
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