Karl Denninger wrote:

2. Cores in decks and hullsides (above the waterline) are acceptable,
PROVIDED they are properly encapsulated. This means that there are
NO PENETRATIONS without the edges of the core being sealed with
epoxy. No way for water to get in, no problems. Note that this
means that hardware must be THROUGH BOLTED; screwing it down into a
cored structure is NOT ACCEPTABLE.

Agreed, but then thru-bolting hardware through a core is also not acceptable. The
compression will deform the core, and then of course water gets in, plus some
helpful person usually tightens the bolts after a while and that makes it worse.

Core should be tapered to a solid laminate where there is hardware thru-bolted.

Fair Skies-
Doug King