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Old 09-01-2012, 17:19   #1
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Manta 40 Hull Moisture Concerns

Is moisture in the Nida-Core common around ports and thru hulls fittings in a 1996 Manta 40? If so, what is the best (preferably most economical) fix?
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Old 09-01-2012, 23:22   #2
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Re: Manta 40 hull moisture concerns

Any cored boat should have all hull penetrations de-cored and epoxy filled.
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Old 09-01-2012, 23:55   #3
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Re: Manta 40 hull moisture concerns

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Originally Posted by wlboyer View Post
Is moisture in the Nida-Core common around ports and thru hulls fittings in a 1996 Manta 40? If so, what is the best (preferably most economical) fix?
Are you sure about that?

Quote:
The stout fiberglass hulls and bridgedeck are layed up with vinylester resins for the most part, cored with Corecell and vacuum bagged. The hull-and-deck joint is laminated, making it more or less leakproof. Bulkheads and subfloors are made with high-tech Nida-Core, which is strong and extremely light, and then covered with veneers.

Manta 42 MK II
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Old 10-01-2012, 05:37   #4
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Re: Manta 40 hull moisture concerns

The earlier Mantas were cored with NidaCore.
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Old 10-01-2012, 07:49   #5
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Re: Manta 40 hull moisture concerns

Yes, this is a Nida-Core Manta. Manta made a switch in 2001 to a different material. Sounds like we can remove ports and thru fittings, dry it out and re-seal. Thanks for your help.
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Old 10-01-2012, 09:32   #6
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Re: Manta 40 hull moisture concerns

Nidacore is pretty impervious to damage from moisture since it is made of polypropelene, I have drilled holes in the bottom of the cored panel and had the water actually drain out, or you could use vacuum assist. Manta's of that vintage had the core edges sealed with putty and the port was installed with 5200.
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Old 10-01-2012, 12:39   #7
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Re: Manta 40 hull moisture concerns

as 44cc said
Quote:
Any cored boat should have all hull penetrations de-cored and epoxy filled.
whether it be a skin fitting, hatch cut-out or a screw
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Old 13-01-2012, 12:17   #8
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Thanks for the info. Very helpful.
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