The only way to be 100% sure is to drill small exploratory holes from the inside . If the shavings are dark, wet, or smell like mulch, the core is gone. 🏗️ Repair Options: Wood vs. Composite

For a "forever" boat like a Grady, using a rot-proof core adds immense resale value and peace of mind. 🪜 The Rebuild Process at a Glance

Repairing a Grady transom is a major undertaking, but it's the difference between a "total write-off" and another 20 years on the water. 🛠️ The Assessment: Is It Actually Rotten?

Chisel out the rotten wood. On older Gradys, this often turns into "mud".

Only use Marine Grade Plywood (like Okoume or Meranti). Never use pressure-treated wood, as the resins often won't adhere properly. 2. The Composite (Coosa Board) Upgrade

Use a multi-tool or circular saw to cut away the outer fiberglass skin . Carefully pry it off to reuse later if possible.

Before you reach for the grinder, perform a thorough inspection. Water typically enters through unsealed screw holes, trim tab mounts, or the aluminum cap Grady installed on older models.