Nightmare. Your boat has been lifted out and washed off and you spot blisters developing under the antifouling below the waterline. That can frequently be the early warnings of elevated moisture developing within the GRP laminate. But, as marine surveyor Ben Sutcliffe-Davies is keen to point out, there’s no need to panic… just yet.
“Nine times out of 10, the blisters on a modern boat are not osmosis; they are often just water blisters that have developed between the hull and coatings. This is often caused by a number of potential issues that include the coatings not being applied properly, that the boat has been epoxied when the vessel wasn’t dry enough, allowing the moisture
