I have solid 3/4" oak hardwood strip that I am looking to nail into the 3/4" plywood that I bought for subflooring. I made this purchase over the pre-made systems because this is the greenest plywood I could find and I am very sensitive to some of the adhesives (VOCs, Urea-Formaldehyde etc...) used in lower grade products. The problem is these are plain old 4x8 sheets that do not have and sort of mechanism to fit together. I cannot nail or glue to the concrete since it is a condo. I was hoping a good underlayment will sort of hold things in place (Wishful thinking I know). I need a scheme to get the plywood down so I can finish my floor.
The concrete is lightweight concrete. I also do not want to pursue a staggered and stacked plywood scheme since I am already adding 1.5" of height to the floor.
Can I just lay the plywood down? Also how big an expansion gap do I need for the plywood subfloor? Is it possible to cut my own groves into the side? Could I maybe staple them together? In the videos I have seen to just tap the boards together.