Hot Vac in Greece Osmosis

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pfrank

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Hi
My Moody 333 have osmosis, at present time she is lying on east coast of England But I planning to cruse to Greece this summer, sooner or later osmosis have to be repair, I know only using Hot Vac method can guarantee osmosis not to reappear
Can anybody tell me if there is any good boatyard in Greece were they doing osmosis treatment using HotVac
Or may be someone done osmosis treatment in Greece and can recommend or share his experience
I well appropriate any advice
Paul
 
ghostlymoron said:
Thats a helluva long way to go to get your osmosis treated
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I read the post as meaning that the OP intends to go to Greece in any case and is looking to get his osmosis fixed while he is out there (as opposed to going to Greece for the express purpose of fixing the osmosis).

Boo2
 
As I understand, the hot vac treatment speeds up drying-out, and is useful in cold damp climates. I don't think hot vac is intrinsically necessary for osmosis treatment though. I'd have thought if you're prepared to have the boat out of the water in Greece in mid-summer (when it can be unpleasantly hot for sailing, anyway) it would dry au-naturel PDQ once shaved back. If so, no need to pay for hot vac.
 
Twister_Ken said:
As I understand, the hot vac treatment speeds up drying-out, and is useful in cold damp climates. I don't think hot vac is intrinsically necessary for osmosis treatment though. I'd have thought if you're prepared to have the boat out of the water in Greece in mid-summer (when it can be unpleasantly hot for sailing, anyway) it would dry au-naturel PDQ once shaved back. If so, no need to pay for hot vac.
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Absolutely right. Several yards in Mallorca have been running successful osmosis treatment businesses. A month out of the water in the sunshine, regular hosing with fresh water, all the nasties washed out and a nice low moisture content.
 
I agree with the above.

Ensure the boat is totally dry before beginning the epoxy layers.

Once done right, the boat will never need it again.

Mine was done last winter by a good yard. It now floats almost 2 inches higher than before the treatment; because the epoxy is impervious to water. I like what the epoxy treatment did for mine.;)
 
Thank You all for replay
It convinced me to not to do osmosis ( HYDROLYSIS ) treatment in Greece, specially thanks to liveaboards fellows
Well Epoxy is not 100% waterproof even manufactures companies saying so, and getting rid of water from GRP doesn't matter, simply because water always will find way to get into hull, only eliminating acids steroids and glycols will give chance to have lasting hydrolysis treatment
For all interested in modern point of view on this subject please read OSMOSIS BOOK hire http://www.osmosisinfo.com/handb9a.pdf
Paul
 
saltwater_gypsy said:
Check out these shots for HOW NOT TO DO IT!!!!

http://i300.photobucket.com/albums/nn14/hectou/DSCF0047.jpg
http://i300.photobucket.com/albums/nn14/hectou/DSCF0044-1.jpg
http://i300.photobucket.com/albums/nn14/hectou/DSCF0045.jpg
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Unfortunately this type of amateur hacking does an aweful amount of damage. If the boat had been pealed it would have been relatively easy to dry out (as long as there was no core), and to apply epoxy glass laminate. Even though epoxy is permeable, with the correct fillers in the surface coating it is a lot less permeable than the original polyester.

Now that this hull is heavily cratered, I don't think a pealing machine can be used to obtain a fair surface. Also a lot less surface area is now open to allow the hull laminate to dry out.

About 10 years ago a few osmosis treatment yards were trying out a heat pad that circulated and dried hot air to a smallish area of the hull being dried. At the time I thought that, although it might improve the moisture readings, it was unlikely to draw out deep set moisture. I was also concerned with the effects of the heat on the polyester matrix. Is this system still used?
 
pfrank said:
Hi
My Moody 333 have osmosis, at present time she is lying on east coast of England But I planning to cruse to Greece this summer, sooner or later osmosis have to be repair, I know only using Hot Vac method can guarantee osmosis not to reappear
Can anybody tell me if there is any good boatyard in Greece were they doing osmosis treatment using HotVac
Or may be someone done osmosis treatment in Greece and can recommend or share his experience
I well appropriate any advice
Paul
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In Marmaris Turkey there are some very good boatyards. (not far from Greece) I have had work done by this yard and they are good. (not osmosis work, but I know others who say they are very good with this). They do hotvac. maybe give them a ring.

http://www.demirmarine.com/services.php?ID=49&PageType=Services
 
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