Hull Delamination - Page 2 - SailNet Community
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post #11 of 18 Old 01-03-2011
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Interesting thread. I just found out from a survey that my boat has developed hull delamination issues. Repair by skinning the hull is cost prohibitive for a 30' boat that is 32 years old. Fastforward26, did you find a repair option?
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post #12 of 18 Old 01-03-2011
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He hasn't posted for 2 years so I doubt he is around here to read this.

What kind of boat do you have and how serious is the damage?

Brian
Living aboard in Victoria Harbour
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post #13 of 18 Old 01-04-2011
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My boat is a late 70's C&C built in the US. The hull showed a soft spot under the slings in the port quarter when it was hauled last year, and a surveyor diagnosed the problem. Also found a soft area in the starboard bow, and some gelcoat cracks elswhere suggesting the problem may be more widespread. Issues have been above the water line.
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post #14 of 18 Old 01-04-2011
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What size and model and year is your C&C ? Most C&C's had balsa cored hulls which is an entirely different issue.

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post #15 of 18 Old 01-04-2011
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I repaired a large area (15 ft2) area on a boat that got bruised by a stand and had damaged core, but only minor damage to either skin.

* Popped it out and repaired the damage to the outer skin. Very minor, just a little grinding and laminating. Easy to fair.
* Stripped the core from the inside and vacuum-bagged new core and inner skin. Not fair as glass, but about like original and hidden under the floor (but open for inspection). Fortunatly there were no bulkheads in the area (which, of course, is why it dented--incorrect blocking by the yard).

I used the boat hard for another 12 years and then sold her. Never a hint of a stress crack through the paint. Probably took about 15 hours of labor and $200 in material. The insurance gave me a check for $5,000!

Core replacement is not difficult. It takes good FRP skills and a plan. I was lucky in that the damage was under the bottom paint and I did not ave to match topsides; that is the labor intensive part, to me, unless you are refinishing the boat anyway. Of course, if the alternative is scrap, a quick coat of pain below the rail is not so hard.

(when asked how he reached the starting holds on a difficult rock climbing problem that clearly favored taller climbers - he was perhaps 5'5")

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post #16 of 18 Old 01-04-2011
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The boat is a 1978 c&C 29 mk 1. I'm not sure if the hull on these is balsa cored or not.
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post #17 of 18 Old 01-04-2011
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The surveyor should have stated whether it was cored or not. If not it would have to be a big hit I think to cause delamination.

Brian
Living aboard in Victoria Harbour
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post #18 of 18 Old 01-04-2011
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We had a similar sized issue & fix with the starboard quarter on our 1981 balsa-cored J/36. I attacked it from the inside and was able to use gravity instead of vacuum-bagging to hold everything together. Messy and time-consuming, but only about $200 of materials.
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