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Old 17-06-2021, 11:51   #1
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Water dam for hull repairs?

Has anyone successfully built a small water dam for allowing repairs just below the waterline?

I have made a dam out of 1/2 of a bucket, but I cannot get anything to seal the water out successfully. T-Rex waterproof tape lost its stick, and butyl rubber bedding compound did the same. I'm in a tidal river, with lots of green algae (<1 foot visibility).

The butyl rubber and the T-Rex tape adhere wonderfully to the bucket, or to dry hull, but the brackish water completely defeats the adhesives.


My objective is to mount a stern saver onto my transom, just below the water line.
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Old 17-06-2021, 12:05   #2
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Re: Water dam for hull repairs?

Our friend Larry Christensen raised the transoms of his 45' tri Invictus fully clear of the water by placing large drums of water on the bows, allowing him to build and glass a sugar scoop to the center hull.
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Old 17-06-2021, 12:06   #3
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Re: Water dam for hull repairs?

Just add weight to the bow
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Old 17-06-2021, 12:52   #4
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Re: Water dam for hull repairs?

Quote:
Originally Posted by gabilo View Post
Just add weight to the bow
Indeed, watched a race crew put 6 big lads on the bow of a 33ft yacht whilst one person in a dinghy paddled under the stern to remove a rope around the prop. Marina H&S were having kittens, but it worked, rope removed job done.

So lots of big water barrels on the bow.

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Old 18-06-2021, 20:37   #5
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Re: Water dam for hull repairs?

A tidal river. So, what’s the differential between high and low tides? Can you careen anywhere near?
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Old 18-06-2021, 21:25   #6
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Re: Water dam for hull repairs?

modelling clay.
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Old 18-06-2021, 22:07   #7
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Re: Water dam for hull repairs?

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Originally Posted by bailsout View Post
A tidal river. So, what’s the differential between high and low tides? Can you careen anywhere near?
You just need to find a tide chart or graph, you will see when it is right to do your careening.
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Old 19-06-2021, 02:27   #8
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Re: Water dam for hull repairs?

Go buy one of those soft rubber sleeping mats and cut a gasket.

Ballasting, or pulling down against a mooring, the bow down to raise the stern down is a better idea.
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Old 19-06-2021, 04:03   #9
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Re: Water dam for hull repairs?

Your heading says Georgia. I unintentionally careened my boat there for a few hours one afternoon. Tides are 9 feet as I recall. Was able to get off and go for a walk, walked out an anchor to pull me off when the water came back..
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