Cracks, Osmosis on my Vega!

Oct 30, 2019
7
Hi everyone,

I'm wondering if any of you have experienced any symptoms of
osmosis on your Vegas. I recently purchased Vega #68 (-67)
and seems like she has a large osmosis problem. When I was
evaluating her, I noticed small cracks in the bottom & keel
but thought they were simply the result of too many layers
of old antifouling, causing the paint to crack. I also believed
my father (who has much more experience with boats than I do)
who said cracks like those aren't likely to be anything
serious. I also heard that osmosis is very very rare on Vegas
and thought it would always manifest itself as blisters on
the gelcoat, not as cracks.

However, now when I sanded and repainted the bottom, I found
out that those small cracks extend through the gelcoat! So it's
not the old antifouling paint that is cracked, the whole gelcoat
layer seems to have small cracks just about everywhere below
the waterline. The problem seems to be worst on the keel,
where it looks like some yellowish residue has leaked out of
the cracks.

I uploaded three pictures to show what I mean. Two of them
are taken of the keel near the rudder and the third is taken
just below the waterline. On the third picture, I've sanded
the paint away to reveal the cracked gelcoat. As you can see,
the cracks form quite a different pattern as on the keel.

I wonder if there can be any other explanation for these
cracks than osmosis. Of course I'm feeling a bit disappointed
as osmosis is likely to lower the boat's value quite a bit.
Then again, I got her for a very low price so I didn't
expect the boat to be in any way pristine condition. And
my brother is a trained boat constructor so he might be able
to do the repair at a reasonable cost if needed.

It's just strange that my boat would suffer from such a large-
scale osmosis, since as far as I know, she's been in Finland
for most of her life and has been in water only 5-6 months
a year. I remember reading that the only Vegas with reported
osmosis problems are the ones that have been kept in the water
continously for many years..

Nuutti Koskinen
 
Jan 28, 2001
694
Hi Nuutti, I don't think the problem is osmosis. Lyric also has a problem
with "the cracks". I believe that when ours were built the gelcoat was
applyed to thick. It's close to an 1/8 of an inch thick.
More modern techniques use a much thinner layer. We stripped off many layers
of old bottom paint and barrier coated the hull. The cracks were gone. Next
time we hauled out they had found their way back. Oh well, they don't seem
to bother anything and gel coat is mostly cosmetic anyway. It keeps the
weave of the cloth from showing through. We also have a problem with the
yellow residue on the keel. I believe it is from old bilge water that is
migrating through the laminate, it dremeled those areas and filled them with
a cabosil/epoxy paste and the yellow stuff still leaked out from around the
same areas. I used the same procedure for stress cracks on the hull above
the waterline. These had occured around the forward bulkheads. It worked
fine there but those cracks were nowhere as extensive as the ones on the
keel. We also had some cracks on the toerail and side decks. Dremeled and
filled them and they also came back! You might also want to check your decks
for seperation. The area under the toerail seems to have been filled with a
resin and sawdust paste. The decks are foam cored. The saw dust can rot but
at least the foam doesn't. We fixed the decks by drilling hundreds of small
holes and allowing it to dry out. Then we used a syringe to inject epoxy.
Stick the syringe into one hole, inject the epoxy until it starts to come
out from other holes. Fill the holes with small wooden plugs and move on to
the next set of holes. Chisel the plugs off after the epoxy has set and
countersink them slightly with a drill. Put a drop of epoxy in each counter
sunk hole. Let it set and sand it flat.
Sounds more complicated than it was. Good luck, Walt
 
Jan 28, 2001
694
Don't know how to fix the toe rails without cutting them off and rebuilding
them. the epoxy injection is for the side decks. Good luck with your
projects! Walt