Admiral Marine Surveying
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How to check keel bolts - Practical Boat Owner

http://www.pbo.co.uk/expert-advice/how-to-check-keel-bolts-28039
http://www.sailmagazine.com/diy/how-secure-is-your-keel
http://www.boats.com/how-to/how-to-replace-keel-bolts/#.WlV-flRdKCc

Water absorption, Osmosis and Blistering

There is often a lot of argument and dispute over the presence of moisture and blisters on fibreglass and other composite marine structures. Like many areas of technology, great advancements have been made in application, chemistry and construction methods over the years. Early composite structures were often very porous and provided little protection from moisture. This problem was often compounded by substandard workshop controls, which led to inconsistent laminates.
For an insight into the issues that confront owners and surveyors, the following links give information on the nature and detection of these problems, and the options available for repairs or rectification.

Nigel Clegg

Respected expert in the field of marine coatings and the detection and treatment options for moisture and other laminating issues.
www.passionforpaint.co.uk/downloads/osmosis3.pdf​

Steve Smith

Expert in the coating technologies available for GRP, Timber and Concrete structures.
www.smithandcompany.org/GRP/GRP.html​

David Pascoe

Internationally recognised yacht surveyor who provides practical insights into yacht manufacturing and maintenance issues.
www.yachtsurvey.com/BuyingBlisterBoat.htm​
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