Assessing the Damage
The first step in repairing a boat’s bottom is conducting a thorough inspection.
Look for common problems such as gelcoat scratches, fiberglass cracks, blistering caused by water intrusion, or worn-out paint.
Minor surface scratches can be cosmetic, but deeper gouges or cracks in the fiberglass may require professional attention. It is best to haul the boat out of the water and work in a dry, wellventilated area for accurate assessment.
Repairing Common Issues
For small scratches or chips, you can sand the affected area and apply marine-grade epoxy or gelcoat filler. This restores the surface and prevents water from seeping into the hull.
Deeper cracks in fiberglass usually require grinding down the damaged section, laying new fiberglass cloth with resin, and fairing it smooth.
Protecting the Boat Bottom
Once repairs are complete, the next priority is protection.
Applying an antifouling paint is one of the most effective ways to shield the bottom from marine growth such as barnacles and algae, which can slow the boat and increase fuel costs.
Choose a paint suited to your boating environment— whether fresh or saltwater—and reapply it every season or as recommended.
Routine Maintenance Tips
Protection doesn’t end with a one-time repair. Regular cleaning of the hull, especially during the boating season, prevents buildup of slime and growth.
Inspect the bottom each time the boat is hauled out to catch problems early. Pressure washing after use in saltwater also helps prevent corrosion and keeps the paint effective.