THE NUMBER ONE PROBLEM WITH FIBERGLASS BOATS 🤦♂️ - (Episode 348)
18 January 2026 · 25 min · 204K views · Langkawi Island
Man inspects damaged hull strip under boat on lift
What this video covers
The crew of a Lagoon 450 addresses widespread hull osmosis and diesel contamination while hauled out for repairs. To manage the osmosis, they consult fibreglass expert Andy Miller of Boatworks Today, who identifies under-catalysed or uncured resin during the original factory vacuum-bagging process as the primary cause of hull blisters.0:24 Miller advises that blister diameter is less critical than depth and recommends establishing a baseline moisture reading by comparing suspect areas against known dry sections of the hull, noting that bottom paint can produce false-positive readings on moisture meters.15:04 The crew grinds out affected fibreglass to reach dry, sound material before applying an epoxy barrier coat.18:58 Separately, the crew installs an inspection hatch in the port diesel tank to remove sludge caused by microbial growth, known as diesel bug.0:40 They also identify and repair a water leak behind the transom swim ladder that caused water accumulation in the sugar scoop.5:03
Boats in this video
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