I intend to rebuild the deck on my 22' primat. Currently, it is two layers of 4.5mm ply ( I think) ... maybe it is one layer of 3/8 in some places ... built in the 60s over kauri framing, and with a paint finish. The top veneer of ply has started to badly delaminate, and after making ugly emergency patches and applying epoxy etc, I've just decided to rebuild whole deck.
It'll be better in the long run and not much more expensive I think. as I need to epoxy the whole thing anyway I can also enlarge the cabin a little to the long cabin design at the same time.
I'd like to add a layer of glass in epoxy to the new deck to add to the longevity and protect the wood.
My question is if I make the deck from one layer of 6mm ply, and then glass it, How much glass should i put on there to compensate for the 3mm of lost strength from thinner ply? or is the 6mm okume (it has a layer of some reenforcing material in the middle) probably strong enough?
Si Dieu n'existait pas, il faudrait l'inventer -- Voltaire