- Part inspection
- Other services
A GRP (glass reinforced plastic) boat hull is a matrix of (usually) polyester resin reinforced with glass fibers, built up in layers. The final laminate will have an approximate ratio of 30% glass to 70% resin. This laminate is not homogeneous, that is even within a well built GRP hull there will be small voids, air pockets and micro cracks within the resin matrix and at the interface between the resin and the glass fibers. This can cause serious damage at the hull and ship structure.
Typically for osmosis is the blisters on the outside of the hull at the underwater line. This blister are sour. Therefore we use special equipment to be sure we are dealing with osmosis.
After a visual inspection the hull will be tested by knocking on it and on specific spots a survey will take place.
In this way it is possible to get a good impression of the overall condition of the hull and his structure. The way how osmosis develops and in which timeline can be different.
Therefore it is required to survey on this matter by a INS expert who has the specialized materials and who is aware of all the facets that affect the measurement.
Not al blisters point out to osmosis and the moisture contents is not always the problem.