On 26-Jun-2006, Al D wrote:

I'm also concerned about the inner core of foam being crushable, say,
when a heavy person steps into the canoe while it's on dry land.

Some foams are quite rigid and will not crush easily. Just don't let any
400lb paddlers wear spike heels in your canoe.

I have some vague memory of a foam-cored plastic laminate that sounds
like what you are looking at, but, like Steve, I'm having a senior moment and
my old brain isn't coughing up the details.

Mike