Inspect hull exterior for cracks, deep gouges, and stress fractures
ContextLay the boat on a padded surface and work from bow to stern in bright daylight or with a flashlight held at a low angle — side lighting reveals surface defects invisible under overhead light. On polyethylene boats, surface gouges less than 3mm deep are cosmetic and don't affect safety. A groove that catches your fingernail and feels soft or flexible at its edges is structural and needs repair before you paddle. On fiberglass and composite (carbon/Kevlar) hulls, look for hairline cracks, chalky whitening (known as crazing), and areas where the gelcoat has chipped away to reveal the cloth underneath. Any crack that penetrates both the gelcoat and the laminate layer — you can usually flex the hull slightly and watch the crack open — is a professional repair, not a DIY weekend fix. Also run a hand along the hull in dim light; you'll feel ripples and high spots that daylight hides.

