Cost of osmosis repair

There is a guy on you tube called Sail Life. He does a DIY job on a Warrior 38 which had osmosis. Great series of films google Sail Life osmosis repair. Very informative.
 
CAPTAIN FANTASTIC said:
This is an old post but the comments and solutions to osmosis are still valid. Boats don't sink due to osmosis. Osmosis is similar to Japanese Knotweed, peope can get hysterical and paranoic about it and can spend huge amount of money. I know that there is the occational case where osmosis has been confused with delamination; delamination is very different to osmosis with the occational structural failure.
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There are legal ramifications for the control of Japanese Knotweed; in particular you are required to state whether it is growing on your property when selling, and neighbours can require you to control it (https://www.rhs.org.uk/advice/profile?pid=218). There aren't any similar problems with osmosis!
 
AntarcticPilot said:
There are legal ramifications for the control of Japanese Knotweed; in particular you are required to state whether it is growing on your property when selling, and neighbours can require you to control it (https://www.rhs.org.uk/advice/profile?pid=218). There aren't any similar problems with osmosis!
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Unlike Japanese Knotweed, there is no legal requirement for Osmosis, however, people feel that there is a requirement for financial reasons and "have to" undertake very expensive osmosis treatment in order to be able to re-sell their yacht at a reasonable price, despite the fact that osmosis is mostly cosmetic.
 
Yep, having undertaken an osmosis treatment on my own boat i can confirm it is both lengthy and costly and if i had my time again i would have just sanded the blisters back filled with thickened epoxy & got on with my life. FWIW it took over a year of my life to get the boat dry not to mention countless weekends sheathing, filling & fairing.

Plus given the current financial state of the secondhand boat market a total waste of money, if you're that paranoid about boatpox just find a boat without it, theres plenty out there..................................and going very cheap the last time i looked.
 
guardian said:
Yep, having undertaken an osmosis treatment on my own boat i can confirm it is both lengthy and costly and if i had my time again i would have just sanded the blisters back filled with thickened epoxy & got on with my life. FWIW it took over a year of my life to get the boat dry not to mention countless weekends sheathing, filling & fairing.

Plus given the current financial state of the secondhand boat market a total waste of money, if you're that paranoid about boatpox just find a boat without it, theres plenty out there..................................and going very cheap the last time i looked.
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Very well said.
 
It depends on the extent of pox, size of blisters and thickness/layup of the hull. The depth of damage is in ratio with the diameter of the blister, shaped rather like a mushroom, bigger the dia, longer the stalk. My own pox present for 26 years with me, now sold on, much more of the gel was attached than detached, say 98%/2%. Survey said no problem. However, I have seen a case where practically the whole gelcoat was detached with small blisters, and a repairer told me that a thin hull with very large blisters had to be scrapped.
 
Recent quote from a Medway yard to sort osmosis on a Thames based Broom 1070 was
£6-8 K.
Seller refused to budge on price so sale collapsed.
Boat has disappeared from brokers listing and is lurking out there somewhere .
Originally exported to Germany then bought back to UK, ended up on the Thames after a period on River Severn.
Buyer had spent much money and time on pre boat purchase stuff ,the osmosis suddenly and mysteriously appeared during final survey to the total suprise of both owner and broker.
The boat had been up for sale for several years.
 
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