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Buckling of Wood-Based Panel Siding

Technical Note

Wood-based panel siding occasionally experiences buckling—a waviness or rippling that occurs between studs, between nails, or across panels—primarily due to moisture-induced expansion and shrinkage. While this phenomenon doesn't affect structural integrity, it creates aesthetic concerns that lead to customer complaints.

This publication is designed for: builders, contractors

The document provides comprehensive guidance on why buckling occurs, emphasizing moisture content changes in wood products and how expansion creates internal compression stresses. It explains the relationship between siding properties, stud spacing, and installation techniques that influence buckling resistance. Importantly, it details proven construction practices that significantly reduce buckling potential, including proper product selection, edge spacing, nailing sequences, finishing, and vapor retarder installation.

Key sections include:

  • Buckling due to moisture absorption

  • Construction features that reduce buckling

  • Buckling induced by other factors

  • Correction of siding buckling

Published by APA — The Engineered Wood Association.

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