Transom patch

mvs788

Cadet
Joined
Oct 23, 2022
Messages
29
Thinking of replacing this section of transom with blue water Coosa board
The roughly an inch and a half thick by 2‘ x 4‘
Epoxied and glassed in.690B3DCF-5DD5-46D2-A704-43817A52FB79.jpeg
 

mvs788

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Oct 23, 2022
Messages
29
replacing just the center and having two joints is like trying to replace a section of a full-span bridge with toothpicks
What if I went all the way across, from gunnel to gunnel, Without going below the deck into the bilge area
 

mvs788

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Oct 23, 2022
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29
Have you done any investigation below deck for rot? Boats rot from the bottom up so you’re not really doing yourself any favors by just replacing small pieces. It’ll be weak structurally.
So I’m guess I’m looking at tearing out the entire transom well, to replace the whole transom in one piece.
 

mvs788

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Oct 23, 2022
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29
Have you done any investigation below deck for rot? Boats rot from the bottom up so you’re not really doing yourself any favors by just replacing small pieces. It’ll be weak structurally.
One of the braces that come up from the bottom of the boat through the transom well is rotted. So I guess I’m looking at tearing out the entire transom well, replacing the transom in one piece, and rebuilding two brand new braces.
 

mvs788

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Joined
Oct 23, 2022
Messages
29
replacing just the center and having two joints is like trying to replace a section of a full-span bridge with toothpicks
I worked on the Throgs neck bridge for three years, it’s more like Band-Aids! That we put on bridges.
 

flashback

Captain
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Jun 28, 2002
Messages
3,963
Yep keep digging, if anything structural has rot it needs to be replaced in it's entirety not patched and most of a boat is structural.. good luck with your project
 

jimmbo

Supreme Mariner
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May 24, 2004
Messages
13,446
If you got all the rotten wood out, you could just replace what you cut, covering the joints with several layers of Glass, each new layer a couple of inches larger than the last, and a couple across the entire Transom and overlapping on the Sides. The repair is strong till the glass ends, which is why I tend to go a bit overkill. Too often I have seen a Structural Repair on Glass Hulls, where the new Mat, not even cloth or Roving, forms what is practically a Butt Joint, with an overlap of 3/4" with the old glass
 

mvs788

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Oct 23, 2022
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OK so, I just realized one of the stiffeners that come up to brace the transom is comepletely rotted,hollow inside.
 

mvs788

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Joined
Oct 23, 2022
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you will most likely find the stringers are also gone and the flotation foam is waterlogged
I’m gonna open up the old floor today, The previous on it put plywood on top of the rotted floor. It’s a 1986chawk, not sure if they used flotation foam
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
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Jul 23, 2011
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49,538
I’m gonna open up the old floor today, The previous on it put plywood on top of the rotted floor. It’s a 1986chawk, not sure if they used flotation foam
the deck-over is a sign of rotten transom, stringers, etc.

the deck is always the last thing to rot

welcome to the full gut-n-restore crowd.
 
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