Originally posted by Cookee
You must be getting your marine ply from a different supplier 'cos ours looks a lot different to that!
Looks more like Stirling Board to me. Generally used for roof construction and general building work.
Not wanting to put a downer on what looks like some realy good work, but are yo sure it is strong enough?
Ply is made up from thin veneers of timber glued at right-angles in each ply to give strength in both planes. SB is basically big chip board, and bonded with phenolic resin in a press. It is very water resistant but will not have as much resistance to flexing.
Having said that, it would make a strong core if laminated over with GRP.