How to check marine plywood?

1. Visual inspection: Check the surface of the plywood for any signs of damage or defects, such as cracks, discoloration, soft spots, or delamination.

2. Moisture content: Measure the moisture content with a moisture meter to ensure the plywood is not damp or wet.

3. Core examination: Inspect the core layers of the plywood for layers of voids and knots. Plywood with too many voids or knots may be weaker and of lower quality.

4. Edge examination: Examine the edges of the plywood for any signs of splitting or chipping.

5. Weight test: Place the plywood on a scale. Higher-quality plywood will typically be heavier due to more layers and thicker veneers.

6. Drop test: Perform a drop test to check for delamination. Drop the plywood on the ground and observe if any of the layers have separated or can be easily removed.