Join Date: Feb 2000
Location: Annapolis, Md
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The only comments that I would make on Sabreman's great post is:
You can not always get a big enough piece of plywood through the companionway to do the whole bulkheadand so you may need to laminate the bulkhead ou of multiple pieces of plywood, half of the thickness of the bulkhead, with their butt joints perhaps a foot or so staggered, and thoroughly glued.
I would strongly suggest using marine plywood since the primary difference is that non-marine plywood has more voids and these are a source of rot and structural failure on a bulkhead with fastenings, and high loads.
The problem with using a fiberglass bulkhead, besides expense and aesthetics is the weight which would be several times the weight of the same thickness wood.