Rot in hull/deck joint - thoughts on necessity of reinforcement? - SailNet Community
 1Likes
  • 1 Post By TQA
 
LinkBack Thread Tools
post #1 of 9 Old 09-17-2012 Thread Starter
Member
 
JeffBurright's Avatar
 
Join Date: Apr 2009
Posts: 79
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 7
 
Rot in hull/deck joint - thoughts on necessity of reinforcement?

Hi all,
Our cold-molded cedar strip/fg sailboat is up on the hard before we start a two-year Pacific cruise, and among other terrible rotten things we discovered over the past couple weeks we found that the top strip of our hull is wet and likely rotten down the starboard side. The shear clamp on the inside of the hull (where the nuts on the hull/deck bolts go) is also rotten, but it's got a pretty thick layer of fiberglass over it, and there is a 12oz combined thickness of glass on the outside of the hull too. Combined though, this has us concerned about the structural integrity of our hull/deck joint.

So the question is this: With a weakened shear clamp mechanism on the stbd side, do you think that the boat will make it safely down the Pacific coast while we let the shear dry out for a later fix? The forestay and chainplates go through the deck to good anchors, our center bulkhead has hull/deck reinforcement, and we've observed no leaks or cracks in our fiberglass. How likely is it that the hull could twist apart or that the deck could peel up? Does this kind of thing actually happen?

If we try to repair it now, we have to option to weld metal strips to the toe rail and through-bolt them lower down on the hull, or alternatively to epoxy some wood knees to the hull/deck joint inside the cabin. However, I'd rather avoid the extra project if I can help it. My Dad is a worrier though, so I come to you for good (well, more) opinions.

Many thanks!
JeffBurright is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 9 Old 09-17-2012
TQA
Bombay Explorer 44
 
TQA's Avatar
 
Join Date: Apr 2009
Posts: 2,887
Thanks: 0
Thanked 77 Times in 73 Posts
Rep Power: 7
 
Re: Rot in hull/deck joint - thoughts on necessity of reinforcement?

IMHO you need a pro to look at this. BAD NEWS!

But CharlieCobra of Baggett and Sons Marine Restoration is not too far away from you and it might be worth getting his opinion.
rugosa likes this.
TQA is offline  
Quote Quick Reply Share with Facebook
post #3 of 9 Old 09-17-2012
Irrationally Exuberant
 
Join Date: Jul 2007
Location: Northern Virginia
Posts: 1,329
Thanks: 9
Thanked 6 Times in 6 Posts
Rep Power: 8
 
Re: Rot in hull/deck joint - thoughts on necessity of reinforcement?

Quote:
Originally Posted by TQA View Post
But CharlieCobra of Baggett and Sons Marine Restoration is not too far away from you and it might be worth getting his opinion.
That's what I would do if there's any way to work it.

Tom K

2000 Beneteau 331
Northern Chesapeake Bay

Ambition is a poor excuse for not having enough sense to be lazy ~ Steven Wright
arf145 is offline  
Quote Quick Reply Share with Facebook
post #4 of 9 Old 09-17-2012
Senior Member
 
overbored's Avatar
 
Join Date: Oct 2010
Location: Dana Point, Ca
Posts: 1,165
Thanks: 1
Thanked 61 Times in 61 Posts
Rep Power: 5
 
Re: Rot in hull/deck joint - thoughts on necessity of reinforcement?

why does the hull /deck joint have fiberglass over it? a true cold molded hull does not use fiberglass. the wood is impregnated with epoxy and does not rot. if there is fiberglass over the cold molding it may be the reason there is water in the shear strip. is the boat cold molded or cedar planked covered with fiberglass?

"FULL TILT II" 2011 BENETEAU FIRST 30
"FULL TILT" SOVEREL 33
"GOLD RUSH" PRINDLE 16
overbored is offline  
Quote Quick Reply Share with Facebook
post #5 of 9 Old 09-17-2012 Thread Starter
Member
 
JeffBurright's Avatar
 
Join Date: Apr 2009
Posts: 79
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 7
 
Re: Rot in hull/deck joint - thoughts on necessity of reinforcement?

Hmm, now that you parse out the two types, I'm not sure. When we bought it four years back we were told that it was cold-molded in the style of the Gougeon Brothers, but it's also true that it is a cedar strip boat with glass and epoxy inside and out. The primary reason for the rot is probably that it traveled from the end-grain at the bow once the bow stem had rotted through (it's been a fun couple of weeks).

So, while the cedar was at least surface coated with epoxy, it doesn't appear that it was impregnated, for what it's worth. The builder must have thought that a layer of glass around the shear clamp was a good idea to keep water out and tie it even more into the hull/deck, but of course in our case it operated to trap water in.

Regarding the survey suggestions, we have had a local surveyor here in the yard (who I think knows his stuff) look at our boat a few times over the past couple weeks. When I described the problem to him the other day, he suggested the wood knee approach if we were going to do anything about it, but he kind of threw his hands up in the air when I asked whether we could make do without it. That sent me here in search of more points of view, or possibly first-/second-hand experiences.
JeffBurright is offline  
Quote Quick Reply Share with Facebook
post #6 of 9 Old 09-17-2012
Once known as Hartley18
 
Classic30's Avatar
 
Join Date: Aug 2007
Location: Melbourne, Australia
Posts: 4,794
Thanks: 45
Thanked 65 Times in 65 Posts
Rep Power: 9
   
Dock
Re: Rot in hull/deck joint - thoughts on necessity of reinforcement?

Doesn't sound good to me, but some pictures would help. You'll need more than a few wood knees to hold the deck together once the boat starts twisting over the ocean swell (a knee has to have something structural to work on) and the last thing you want in a storm at sea to have the deck open up on you.

In sheltered waters you might be fine, but if you're planning a 2-year cruise away from quality repair facilities, best get CharlieCobra onto it right now. Give him a call - he will know what to do.

-
"Honestly, I don't know why seamen persist in getting wrecked in some of the outlandish places they do, when they can do it in a nice place like Fiji." -- John Caldwell, "Desperate Voyage"
Classic30 is offline  
Quote Quick Reply Share with Facebook
post #7 of 9 Old 09-17-2012
Senior Member
 
rugosa's Avatar
 
Join Date: Aug 2011
Location: In a strange land
Posts: 578
Thanks: 1
Thanked 10 Times in 10 Posts
Rep Power: 4
 
Re: Rot in hull/deck joint - thoughts on necessity of reinforcement?

If you are planning to 'take to the sea', presumably you also plan to 'return from the sea'. Pro now, thankful later.
rugosa is offline  
Quote Quick Reply Share with Facebook
post #8 of 9 Old 09-20-2012
Junior Member
 
Quester's Avatar
 
Join Date: Sep 2012
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: Rot in hull/deck joint - thoughts on necessity of reinforcement?

Quote:
Originally Posted by JeffBurright View Post
...So the question is this: With a weakened shear clamp mechanism on the stbd side, do you think that the boat will make it safely down the Pacific coast while we let the shear dry out for a later fix?...
If you mean down to Southern California, probably it will. Odds are much improved if the boat has decent ability to travel under power and you plan to use the engine extensively if necessary. Also if you go now, or yesterday, or several months from now.
Quester is offline  
Quote Quick Reply Share with Facebook
post #9 of 9 Old 09-21-2012
Senior Moment Member
 
SloopJonB's Avatar
 
Join Date: Jun 2011
Location: West Vancouver B.C.
Posts: 11,367
Thanks: 59
Thanked 67 Times in 64 Posts
Rep Power: 5
 
Re: Rot in hull/deck joint - thoughts on necessity of reinforcement?

Quote:
Originally Posted by JeffBurright View Post
So the question is this: With a weakened shear clamp mechanism on the stbd side, do you think that the boat will make it safely down the Pacific coast while we let the shear dry out for a later fix?
It ain't going to dry out at sea. It ain't even going to dry out at the dock. If it is as bad as you make it sound, cutting it out and laminating new wood in is the ONLY cure.

I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.
SloopJonB is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Seeking opinions for deck and hull-deck joint repair gregor1234 Gear & Maintenance 8 04-25-2012 11:10 PM
Glassing over hull/deck joint Barquito Gear & Maintenance 16 10-04-2011 08:42 PM
Deck to Hull Joint voice3 Sailboat Design and Construction 9 11-03-2008 05:10 PM
hull deck joint ArgleBargle Sailboat Design and Construction 5 09-28-2008 07:45 PM
Split deck cap and leaking hull/deck joint alaskaboy Gear & Maintenance 2 01-04-2008 09:25 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome