I knew I'd be opening a can o' worms!
The Tramex reading he go on the cockpit was virtually zero, to give an idea
of calibration. The foredeck was a spotty 60-100, but Trojans have always
been weak in this area. All soundings were good (including the hull),
except for two small foredeck spots w/ compromised soundings.
"Marley" wrote in message
...
Izmack wrote:
Hi Everyone,
We are looking at at late 80's Trojan F32 with very high moisture
readings in the hull, but zero signs of blistering either currently or
in the past. Our surveyor, who was VERY thorough, said the following:
"Bottom was found in above average condition, having no signs of
blistering,crazing or delamination. High moisture levels were noted,
ranging between 80-100 and some crusty deposits were noted, indicating
laminate hydrolysis. Recommendation to dry store vessel each winter off
season to maintain current good condition. If vessel is left overboard,
some blistering or delamination could be expected over time."
I know I'm asking for a barrage of opinions, but, considering it's a 16
year old boat and the fact we are first time boat buyers and that the
rest of the survey was above average, what do you all think? And -
will future buyers balk at resale?
You need to better understand moisture meters and readings.
Moisture meters have to be calibrated very carefully.
For example they are used extensively in determining the amount of
moisture in lumber when it is being or has been cut or kiln dried. In
order to make that determination the user first sets the calibration of
the meter against a known standard. In other words, using a piece of
identical lumber of a specific known moisture content that is kept in a
controlled environment.
In the case of a boat, that is not easily accomplished. In fact is
impossible. You don't have a standard upon which to calibrate the
meter. Bottom line, the actual NUMBER read is completely meaningless. I
repeat, it is MEANINGLESS.
The ONLY results that are really valid when metering a boat relate to
the differences in level found at different points on the hull. A
reading like 80-100 is truly meaningless in a non-calibrated environment.
What DOES hold meaning is if your meter reads a level like 80 everywhere
EXCEPT around a through hull or some other fitting where it reads
substantially higher. That might indicate a problem in the hull where
the through hull is bedded. BUT it might also indicate that the glass
surrounding the through hull is thicker (more dense which reads higher)
for increased strength.
You should also do readings with a meter on the deck, in areas where the
deck is not penetrated (middle of the deck for example) and then around
various fittings like cleats, hatches, winches, etc. Assuming that the
deck is cored with a water permeable material (some are, some aren't), a
higher reading relative to a non-pentrated spot might indicate moisture
in the core. It doesn't mean there is moisture for sure...it means
further investigation is appropriate.
Moisture meters readings of hulls and decks are completely subjective in
nature. The only really useful thing they offer is an indication of
possible problem areas where readings are substantially higher than
other areas.
Even then, further investigation often proves a valid reason for the
reason.
Just to give you an examle of what I mean by calibrating a meter: I can
place my meter on my saloon table and adjust the calibration so that it
reads anywhere from 0 to about 200. So if I set it to 200, does that
mean that my saloon table is completely full of water? No it doesn't, it
means that I set it to 200....nothing more.
Believe it or not, MANY surveyors frequently have no clue that this is
the case.
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