: Hi Murray,
: It depends what you are going to do with it. If you are paddling sea or lakes
: and don't envisage hitting rocks hard, a solid bulkhead is fine. If you
: hit rocks hard enough the hull can deform and then a wooden bulkhead
: creates a possible break line. Therefore, some go for a foam bulkhead.
: However, if you are going surfing with the kayak then a foam bulkhead
: won't do if you nosedive into the sand. So, as I said, it depends.
: JohnK

You could also take the wood bulkhead and surround it with a foam strip then you'd have a strong watertight bulkhead the can't cause a hard spot. With a cored hull I don't think you have anything to worry about in the first place, it's pretty stiff and won't easily deflect. That theory was based on single skin glass construction that's fairly flexible.

Bill H.