One of the most common causes of plywood failure is prolonged moisture exposure. When panels are not suited to the environment, swelling, delamination and edge breakdown can occur.

This is especially common in:

• Coastal construction
• External applications without proper sealing
• Subfloors exposed during construction

Selecting the correct grade is critical in these situations. Bord’s plywood range includes options suited to both structural and external applications.

These risks are explored further in Marine Plywood vs Exterior Plywood: What Australian Builders Often Get Wrong.

Using plywood that is too thin for the application can lead to deflection, movement and long-term structural issues. This is particularly relevant in flooring and load-bearing applications.

Thickness selection should always align with span and load requirements, as outlined in Plywood Thickness and Panel Selection Guide for Australian Builders and Designers.

Fixing methods play a major role in plywood performance. Incorrect spacing, inadequate fasteners or poor edge support can lead to panel movement and failure over time.

Common issues include:

• Insufficient fastener spacing
• Incorrect fastener types
• Lack of edge support

These problems are often avoidable with proper planning and installation practices.

In some cases, plywood is over-specified, adding unnecessary cost without improving performance. Marine plywood, for example, is often used where exterior plywood would be sufficient.

Understanding actual exposure conditions helps avoid this, as discussed in Plywood for Outdoor Projects: Choosing the Right Grade for Australia’s Harsh Climate.

Most plywood failures can be traced back to early-stage decisions. When grade, thickness and installation are aligned with real-world conditions, long-term performance improves significantly.