I am going to build my first epoxy board, I ve built a couple boards with 249 resin. Assuming I have access to all three densities of eps and following Greg Loehr’s recomendations:
2# EPS - Use one layer 6 or 2 layers of 4 bottom… Use 2 layers 6 or 3 layer 4 deck.
1.5# EPS - Use one 4 and one 6 oz for bottoms… Use two 4 and a 6 for the deck.
1# EPS - use two 6 bottom… three 6 deck.
Which would be the strongest? Which would be the lightest?
The 3rd option would be the lightest. (And the softest)
The first option would be the strongest. And with 2# you can go even a little lighter on the glassing - 1x 6 on the bottom and 1x6 + a 3/4 patch of 6 on the deck.
I haven’t tried all the possibilities, but I bet that the first option with give you a finished board that is both stronger AND lighter than the other two options.