fibreglass boat osmosis
The term “osmosis” was coined in the early 70’s to describe the blistering found on many grp boat hulls and is now in common usage. a grp boat hull is a usually a mixture of polyester resin reinforced with glass fibres, created in layers which forms a laminate.. A professional boat surveyor will recognise the early signs of boat osmosis. “if any blisters are evident at the time we are conducting an out of water hull inspection on a vessel with a solid fibreglass hull bottom, typically they will be one of the following two types of blisters: 1.. Of course, additional costs are associated with this, but that is the joy of owning a boat! wooden boats can develop rot or electrolytic problems. steel can develop rust, and of course osmosis can develop in fibreglass craft. although found more often in older craft, osmosis is treatable if not to severe.. 
fibreglass boat osmosis Osmosis explained osmosis is fibreglass cancer. in permanently immersed polyester fibreglass boats, there are some laminates which contain certain defects which attract water into the structure of the fibreglass, and this water creates enough internal pressure to form blisters in the hull. these. Osmosis is more prevalent in warm climates, and the blisters can reach the size of dinner plates. if you’re buying a boat that has spent a lot of time afloat in the med, for example, get a surveyor to take a close look at the underwater hull..
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