 |
|
|
|
|
|
|
|
|
"There is always some osmosis on older boat (20 years +) and it
shouldn't be a problem" is fairly close to the mark. However whether
it is a problem or not depends upon the extent and how developed it
is... how large are the blisters... how deep... etc... really a matter
of judgment.
How long will a treatment
last? 
The current treatments will deal with the problem for a long period
... if correctly treated this should be in the 15 - 20 years range but
will not be an "absolute cure". Most yards / paint suppliers
will only offer guarantees against further blistering for generally
5 years only. However I usually find that most coatings are good for
at least 10 years and often 15. Coatings / treatments have improved
over the years so the more recent ones I would suspect will be longer
lasting ... we will have to wait and see I'm afraid ???
Should I treat my boat at
the first signs of osmosis?
Osmosis once started (ie: blistering) will progress and generally it
is worth waiting to treat the hull until the blistering is fairly extensive,
more extensive than just "wicking" and high moisture readings.
Does treatment increase the
value of my boat?
In many respects boats that have been recently treated will have an increase in value. Although not always the case...
How much will osmosis
effect the value of my boat?
A reduction in sale price of approx. half the cost of a full treatment.... is often reached when a vessel has been found to have "osmosis" during survey. The reduction is generally some what less than half cost on smaller/cheaper boats but does depend on offer price etc.
Will my boat be easy to sell
once it has been treated?
Selling a boat that has been treated (preferably in a yard with documented history / warranty etc) should be no problem.
"Simpson on second hand boats"
Andrew Simpson. Water Line Books. ISBN 1 85310 371 3
fairly recent, small approx. £5.
Care & Repair of GRP Boats
Tony Staton-Bevan. Older book.
Hempel Osmosis Manual.
Hempel’s Marine Paints A/S.
The Osmosis Manual. £30.
Nigel Clegg: Tel: 01740 620489.
The Manor House, West End,
Sedgefield, County Durham, TS21 2BW.
A short guide to osmosis and its treatment.
Nigel Clegg: Tel: 01740 620489.
Surveying Small Craft. £20.
Ian Nicolson.
Adlard Coles Nautical. ISBN 0-7136-3949-0
