I was driving picking up new locks for my airstream compartments. I was getting them for free from a person who did not need them. On my way I went by a new factory in Covington Georgia that makes Nyloboard. When I got home I called the company and asked about their product. I asked if they had 3/4 inch sheets 4 x 8 sheets of this product and they said they did. They told me it was stronger then 3/4 inch plywood and water resistant. I asked them if I could use it for a subfloor and would it carry more weight then 3/4 plywood. I was told over the phone it was stronger and more durable then plywood. Nyloboard is going to send me a sample to look at. I am posting the link for you other people to check out. I have never used this product but it sounds pretty good.
Nyloboard - Applications
SIU Bound
Brian