Deck core material question??

[JohnC]

Thanks for the feedback.
After some trial and error, every part I've made with infusion has been lighter than I can make with hand layup. I don't know the glass to resin ratio but I definitely use less resin to saturate the glass. I have this fantasy of making a hundred-pound deck and gluing it in. That being said, hand layup seems like a safer bet when I add all of the cost of the parts. I'm not confident that I can do a part that size perfectly the first try.
With no good reason for foam core, I'd rather save the cash and buy Nida-Core. I gave up on my budget a long time ago but every little bit helps. Hopefully I'll be shopping for deck hardware soon. I can blow several hundred on the Gemlux website without breaking a sweat!
The Nida-Core at Merritt Supply has a plastic membrane under the scrim. Thanks dirtwheels for the heads up to look for that.