Unit 25. Surveying FRP Craft


The term ‘GRP’ is a universal abbreviation for Glass Reinforced Plastic (or Glass Reinforced Polyester), which is by far the most popular type of composite used in the production of small craft. However, many people know this material as ‘fibreglass’ (‘fiberglass’ in the USA), or ‘glass fibre’, which of course only refers to the reinforcing fabric, and not to the resin which holds it all together!

In practice, nearly all production GRP craft are ‘laid up’ using unsaturated polyester resins, although there are a few notable exceptions. Several different types of polyester resin have been used in boatbuilding over the past fifty years, all with differing properties. It is essential, therefore, that the marine surveyor is aware of these resins, when they were used and why, as there are subtle, but important differences in their behaviour. This unit will provide the knowledge. As an example, older resins, are at much greater risk of ‘osmosis’ and osmotic blistering than current materials.

FRP (or Fibre Reinforced Plastic) is a more recent term, which encompasses reinforcing materials other than glass; such as carbon fibre and Kevlar®; the latter being a synthetic (Aramid) reinforcement produced by the Du Pont Corporation.

Please note.
By choosing to buy this Unit you are not entering into the full educational programme but you can complete an assignment for this Unit and receive an IIMS Certificate on successful assessment. Further details of this will be sent to you when you make your purchase. If you decide to take the full Educational Course at a later date you may be able to use your successful pass to make up part of your qualification.  Please be reminded that this cost covers one download of a .pdf document, there is NO hard copy. There is no refund available. Please call the Education Team direct if you have any queries: 023 92 313012 or 023 92 313015

Instagram Posts from the IIMS @iimsmarine