Inside Transom Damp but not Rotted

realboats

Petty Officer 2nd Class
Joined
Apr 24, 2004
Messages
116
Hi. I was installing a jack plate today and I noticed that when the holes were being drilled, that the wood being forced out by the drill bit is wet. It wasn't real wet, or even soggy, but kind of damp. There doesn't appear to be any rot anywhere. I even ripped off the trim around the cutout and the wood looked fine. The sawdust from the drilling looked pretty normal, and the drilling was difficult enough that the transom must be solid.<br /><br />The transom is almost 3" think with three layers of plywood laminated in fiberglass and very heavy laminations on the outside layers.<br /><br />Now get this: The boat hasn't been in the water for five years! I can't for the life of me figure out how moisture got into the wood, unless it's from internal condensation or rain. There are no gel coat or fiberglass cracks or any other type of breach that could lead water into the transom.<br /><br />My gutt instinct is to just not worry about it, but my cautious side is leaning towards taking some kind of action. I had thought about drilling holes into the wood, treating with some type of water-absorber like isopropyl alcohol or glycol. Then maybe inject some thin epoxy like git-rot. <br /><br />But then, I was wondering if this dampness isn't normal for a transom with so much wood. <br /><br />Any suggestions on what you would do in a situation like this?<br /><br />Thanks,<br />Dennis
 

Terry H

Lieutenant Commander
Joined
Sep 25, 2001
Messages
1,862
Re: Inside Transom Damp but not Rotted

realboats <br />You are right to be concerned, it's not normal, nor is it good for the wood in the transom to be wet. you say it's not rotted now, well it will rot if it stays wet. Solution? somehows you need to dry it out and seal it. Maybe someone will chime in with a product that can displace the water and or seal the wood so it can't absorb water again, but it does need to be dry. You will need to find out how water gits in and seal up the problem...just some thoughts :cool:
 

realboats

Petty Officer 2nd Class
Joined
Apr 24, 2004
Messages
116
Re: Inside Transom Damp but not Rotted

Thanks Chief. I should have mentioned that there were a few places I had patched up on the transom a few months ago. For example, the previous owner did a real hack job installing a bilge pump thru-hull because he wasn't able to find one long enough to go all the way through the transom. It's amazing how many people will install something on the transom or deck, but not spend a few extra seconds to seal things up with some silicone or epoxy.<br /><br />The hull to transom joint is totally solid and sealed. The boat has spent the winter sitting under a well-ventilated tarp laid over an a-frame.<br /><br />Guess I'll check out the rot doctor to see what I can find out. Letting the boat sit for a year to dry is out of the question, though. I'll do what I can to attack the problem for now and take a closer look at the end of the season.<br /><br />If anyone has any ideas on what I can do to at least keep the problem from getting any worse, please jump in. :) <br /><br />Thanks,<br />Dennis
 

G DANE

Commander
Joined
Nov 24, 2001
Messages
2,476
Re: Inside Transom Damp but not Rotted

If you can get access to buttom of transom from the inside of boat, drill a serie of 1/4" holes through glassfiber skinn. You will have water dripping out. Install a heat fan inside the boat, placed so it keeps transom hand warm. Cover the boat. Uncover the boat and leave with direct sun on transom on dry sunny days. It will dry out that way. If you just seal it and go ahead, it will NEVER dry out, and for sure rot.
 

realboats

Petty Officer 2nd Class
Joined
Apr 24, 2004
Messages
116
Re: Inside Transom Damp but not Rotted

Thanks G Dane. Actually, I've already drilled several holes, incliding one at the lowest point of the V, but no water came out. I probably caught it early.<br /><br />What I'm doing now is filling the holes with isopropyl alcohol to dissipate the moisture. If anyone doesn't agree with this, please let me know. <br /><br />I will also do the heater method you mentioned.<br /><br />The Rot Doctor, at www.rotdoctor.com , has a product that he claims will go after the water and seal/strengthen the wood. Sounds a little too good to be true, but I'm going to give it a try. <br /><br />Thanks,<br />Dennis
 

BillP

Captain
Joined
Aug 10, 2002
Messages
3,290
Re: Inside Transom Damp but not Rotted

Use denatured alcohol or acetone. Isopropyl usually has a lot of water in it. Let a fan blow on the holes for a month or two. <br /><br />Don't depend on epoxy resin to displace water in saturated wood. Try some test samples and cut them up to see how well it really works. Don't be surprised to find wet wood and no saturation past 1/8-1/4" deep.
 

realboats

Petty Officer 2nd Class
Joined
Apr 24, 2004
Messages
116
Re: Inside Transom Damp but not Rotted

Bill, the iso I get at my local hardware store is 99%. I know the stuff they sell in many of the drug stores is only 70%. I think the 99% will do it. <br /><br />Has anyone used The Rot Doctor's CPES (Clear Penetrating Epoxy Sealer)? If so, please let me know how you made out. You can see the product description at <br /> http://www.rotdoctor.com/products/product.html <br /><br />Thanks,<br />Dennis
 

quantumleap

Master Chief Petty Officer
Joined
Feb 16, 2004
Messages
813
Re: Inside Transom Damp but not Rotted

CPES is one of the best product for your situation, BUT you must make sure the wood is completely dry before using the CPES or you will only be sealing in the moisture permanently and it will never dry. Drying the transom wood will be difficult but heat lamps and a fan is your best bet. Take your time and good luck.
 
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