Floor Core question -

[dcobbett]

FWIW, I re-cored the cover on the fuel tank coffin of my 1976, 20'SF a few weeks. The old core was 6" +/_ squares of 3/8" marine ply (Fir). I started the new core with a layer of 1.5 oz mat on the inside surface of the glass, then 1 layer of 3/8" ply (in 5 different sized sections), then 2 layers of 1708 (epoxy throughout) and I think the new core is stiffer that the old core was when I took the cover out of the boat.