Re: [Paddlewise] Confessions of a boat abuser

From: Dave Kruger <dkruger_at_pacifier.com>
Date: Fri, 05 Mar 1999 20:18:56 -0800
inetex wrote:
> 
> I got pushed up on a lee shore "beach" and bashed and then
> rolled over a log in the heavy shore break, and split the deck seam along
> from one bulkhead to the other (6 feet). The two halves are separated now,
> and I'm leaving for a Central Coast trip in a few weeks. HELP!
> 
> 1) I can repair the inside seem with cloth tape and epoxy, but does anyone
> know a good way to stiffen or strengthen the joint so it is better than
> before?

I fixed an Eddyline Wind Dancer which had suffered a similar seam
separation on both sides of the cockpit.  Basically, you need to hog out
the old seam tape and resin (scraper, chisel, right-angle high-speed
grinder with 80-grit on it -- a truly ugly task -- and wear a dust mask
*constantly*).  Take all the old seam tape out -- right down to the top
surface of the main hull layup material, *but not into the layup glass!* 
This is tricky.  

I used polyester resin and mat on the Wind Dancer, but now I would use
epoxy and mat sized for use with epoxy.  (System Three out of Seattle, WA
[http://www.systemthree.com/index.html] is a good brand, and they will ship
you a useful, free booklet on epoxy.)  The epoxy is stronger, remains
pliable longer, and is less stinky.  It is critical that you avoid skin
contact -- the resin is not horribly toxic, but sensitization is probably
inevitable on repeated contact, and can occur after just a few exposures in
sensitive individuals.

It is important to maintain a high glass/resin ratio (though you do not
want any "dry" glass), so you will have to figure out some way to squeeze
out excess resin from the layer(s) you put in.  If you speak nicely to
someone who does this sort of repair professionally, you might get to use
their vacuum bag arrangement.  I used lots of smallish lead bars, but
multiple bags of lead shot would be better.

I would not recommend trying this if you have zero experience with glass.

> 2) Should I run an outside seam? It "seems" to me that these British boats
> are heavy and well built, but suffer from the fact that one little thin
> seam on the inside holds the whole thing together, and once an incipient
> crack starts, the whole thing un zippers (this happened to a notorious
> Nordkapp surfer on the Oregon coast a few years ago).

20 years of heavy use on that one little thin seam is probably a reasonable
expectation.

> 3) I have a custom $400.00 epoxy paint job. Will I have to sand that and
> then the underlying original gel coat to make an outside seam adhere properly?

Yes.  You want mechanical bonding to the layers immediately adjacent to the
glass in the layup.  However, if you do a super job on the inside and
*seal* the outside so water can not enter, the inside seam patch job should
last for years, long as you don't do any more dancing with logs!

> 4) My boat is kept outside, upside down. Has UV damage weakened the
> fiberglass? Does fiberglass have a lifespan?

Probably minimal UV damage, inless massive sections of the gel coat have
worn away.  A lifespan?  I would think so -- the aging of the polymer would
be accelerated by heat, ozone, etc.  IIRC, the main effect of time is
embrittlement, which could account for the fracture your boat experienced.

> 5) Should I buy a plastic kayak from Costco? (VBG)

Clumsy as you are, probably not a bad idea <G>.

-- 
Dave Kruger
Astoria, OR

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Received on Fri Mar 05 1999 - 20:24:01 PST

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