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post #1 of 4 Old 01-08-2008 Thread Starter
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Got those wet core blues

My Cape Dory 28 has a couple of areas of delamination on deck in the vicinity of some poorly bedded hardware installed by a PO. I drilled some test holes over the weekend and both of these areas have wet core (balsa). I did not see any evidence of rot fortunately. The wood seems to have maintained its integrity thus far. I really do not want to replace core. However, I have read on various posts that the "drill, dry, inject" method should only be used for small areas. One area is approximately 1 sq. ft. and the other 2 sq. ft. Both are somewhat irregularly shaped. Is this too large an area for this method? Why is it better to re-core larger areas? Thanks.
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post #2 of 4 Old 01-08-2008
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IMHO, anything larger than a square foot, probably needs to have the core replaced. The reason it is better to re-core, rather than just inject, is that recoring rebuilds the strength of the laminate to what it was originally, without adding much weight. The dry and inject technique adds some strength, but not as much as re-coring does, and it adds additional weight to the deck in those locations.

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post #3 of 4 Old 01-09-2008
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Unfortunately...I agree. You lose structural integrity with widespead delamination areas and the simple injection of epoxy will not restore that integrity to larger areas.

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post #4 of 4 Old 01-09-2008
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Of course, the other advantage of cutting the laminate open and re-coring it, is you can see the areas that you're removing and it makes it much harder to miss a rotten section.

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