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johnbanfield 08-05-2019 10:06 PM

Fixing hull and deck leaks
 
Hi All,

from Wakatobi, Indonesia.

We have been sailing upwind again and our hull and deck leaks are getting worse on our 1981 37.

Has anyone had this problem and fixed theirs up?

I am tossing up between trying sealant in the visible gaps, filling with epoxy filler, or ideally taking up the timber toe-rails and glassing over. (Major work will have to wait a few months.)

Thanks,
John
s/v Libby

MarkofSeaLife 08-06-2019 02:58 AM

Re: Fixing hull and deck leaks
 
Got some photos?
Our experts might need plenty of information to help you better 😊

PhilCarlson 08-06-2019 07:08 AM

Re: Fixing hull and deck leaks
 
If hull flex is working the joint you'll probably want a pliable sealant as a temporary fix. Epoxy would probably just separate.

Pics would help.

SloopJonB 08-06-2019 11:19 AM

Re: Fixing hull and deck leaks
 
A rigid adhesive like epoxy is wrong for that joint unless it will be thoroughly glassed over.

Otherwise something flexible is correct. Currently builders use something called Plexus - apparently it bonds & seals without fasteners.

wsmurdoch 08-06-2019 07:18 PM

Re: Fixing hull and deck leaks
 
1 Attachment(s)
I have leaks where the screws in a repaired area of the caprail passed completely through the hull-to-deck joint (which they should not have) and produced leaks. I have plastered 5200 over the screws from inside the hull as a temporary repair.

Bill Murdoch
1988 PSC 34
Irish Eyes

johnbanfield 08-06-2019 08:31 PM

Re: Fixing hull and deck leaks
 
Thanks everyone,

Photo doesn't show much - just a crack with old sealant flaking out of it.
If you look at Bill's diagram the water is coming in between the deck flange and the hull.

I'll try caulking with sealant now, and then I'll consider pulling off the cap-rails, re-sealing all the fasteners and fittings and glassing over permanently in Thailand or Malaysia where getting work done is affordable.

Thanks for the advice not to epoxy fill it.

Cheers,
John

SloopJonB 08-07-2019 10:56 AM

Re: Fixing hull and deck leaks
 
I'd use wooden wedges to open the seam a little so the goo can be squeezed in.

Barquito 08-07-2019 11:56 AM

Re: Fixing hull and deck leaks
 
Quote:

I have plastered 5200 over the screws from inside the hull as a temporary repair.
Those are oxymoronic words.

roverhi 08-09-2019 10:11 PM

Re: Fixing hull and deck leaks
 
If fasteners are leaking, the only real fix is to pull and rebed them. That will probably involve removing the cap rail. Typical hull to deck fastening is bolts through the caprail on 1' or so intervals with 2 or more countersunk self tapping/sheet metal screws in between the through bolts that the cap rail covers. Really like butyl for sealing the fasteners.

Putting caulk along cracks never lasts for long.

johnbanfield 08-13-2019 02:52 AM

Re: Fixing hull and deck leaks
 
Thanks everyone, we've just been on passage and are now in Komodo.

The big experiment on this downwind passage was to run up our spare Yankee as a twin in the other furler track. Worked a treat on anything over 12knots.

We are definitely planning to pull the cap rails up and do this properly in Thailand.

Cheers,
John


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