Hello Cris,
I have just noticed you posting of 19 Mar 2007 09:44 AM , and in the last but one para' you suggest that the NCC should be dictating GRP construction technique.
I fully agree that the caravan industry really does need to get its act together about manufacturing techniques, as we have agreed before its not rocket science to put together a water tight box on wheels.- as you point out the marine industry has been doing it for years.
Sadly the NCC does not control the industry. It is actually a trade representatives body, and have no legal teeth in getting their members to change anything. Membership of the NCC is not a prerequisite to being a manufacture, and in fact a few years ago some manufactures actually withdrew their support for the NCC.
Technically the design of a product is down to the manufacture and they only have to comply with a limited number of statutory construction regulations, which in general only relate to the roadworthiness, fire resistance, gas system tightness and potable water systems.
British and ISO standards are not enforceable unless they are governed by statutory regulations such as those above, or they are a requirement to support a CE mark - but many are self certified, rather than audited, so there are widely varying interpretations of the standards, some may be ignored or deliberately misinterpreted to meet company deadlines.
Whilst pressure on the NCC might realise some recommendations, it is going to take more than that to bring real changes.
As much of the cost of rectifying these unsatisfactory designs is borne by the insurance industry, perhaps they should be proactive in setting some standards for manufactures to keep repair costs down by proving that designs and manufacturing processes are right in the first place.
Alternatively, it would need more than just an individual to bring a case to court, but how about a class action to force one manufacture to prove designs more effectively. Assuming the action were successful, the precedent would be set and all manufactures would sit up and do the necessary work to make and keep caravans watertight.