303 Siding Manufacturing Specifications

APA 303 Series specialty siding represents a specific classification of plywood siding products designed for exterior applications. This data file establishes the minimum manufacturing requirements that plywood panels must meet to qualify as APA 303 Series specialty siding.

This publication is designed for: engineered wood manufacturers, specifiers, dealers

This publication provides comprehensive manufacturing specifications covering veneer grade and workmanship requirements, repair methods, panel construction standards, groove specifications, and span rating qualifications. It includes detailed tables showing the various APA 303 siding grades and their permitted characteristics.

Key sections include:

• Gluebond

• Veneer grade and workmanship – general requirements

• Species

• Panel construction

• Grooves

• Span rating

• Texture 1-11

• APA 303 panels that meet California state fire requirement

• Shiplap edges

• Marking

Published by APA — The Engineered Wood Association.