Oops! The results of a halfassed repair...

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May 5, 2006
1,140
Knutson K-35 Yawl Bellingham
On pulling the canvas on Oh Joy, I found a patch of epoxy or some other resin laid in around the aft port lower chainplate. After digging it out, I found rot underneath. Apparently, the morons didn't dig the rot out or treat with Ethylene Glycol to kill the spores. These pics show the extent of the damage AFTER I dug out the rot.

The bit of deck lost from the preliminary cut.



More detail



Where the Sheer plank bolt passes through the chainplate to the stringer.



A view of the remains of the rib between the planks and the chainplate.



Some damage to the sheer plank.



The stringer after the rot is dug and chiseled out.



Interior views of the mess.







The outside of the hull where this damage is.



The fact that the glass overlaps the sheer plank makes it impossible to pull it but also keeps everything rigid and in place is a double edged sword. I could've sailed like this for many years without issue since the chainplates go so deep and are banded down to the keel on Oh Joy (she's built like a tank) but I'm gonna figure out a way to replace the bad sections of wood. I'll use a combination of wood, epoxy and fasten the pieces in both mechanically and chemically.

First off is to find a good source for Ethylene Glycol to kill any spores. Then I treat with CPES to restore the remaining wood structure and follow with the replacement pieces. I'll bolt, screw and epoxy it all in place and no, that deck cut isn't the final cut...
 

caguy

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Sep 22, 2006
4,004
Catalina, Luger C-27, Adventure 30 Marina del Rey
Is this your $700 find or another project? I'm sure you are aware of that water based epoxy for treating wood rot. I used it on my Model A and the stuff is remarkable. The old porus wood just sucks it up and plasticizes.
 

caguy

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Sep 22, 2006
4,004
Catalina, Luger C-27, Adventure 30 Marina del Rey
It was some that I picked up at Lowes. In searching the internet I found some for marine use too. Here is a link that explains it. It was a couple of years ago that I used it and I was amazed how the wood just soaked it up. It was a real life saver unlike Mainsail and his dad I didn't want to have to pull the body off the frame. I read somewhere and I can't find it now where they mixed in Boric acid to help kill the termites. I don't think that is your problem but a fungicide probably wouldn't hurt.

http://www.rotdoc.com/test/penetration.html
 
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