Completed subfloor decking. Installing the subfloor decking/sheathing was actually fairly easy and straight forward. It's just very important to make sure that your subfloor framing is spaced properly and accurate so that the ends of the tongue-and-groove plywood sheets end halfway over one of the subfloor joists. This means that your tolerances must be within about 3/4"... not a big deal, but I was cutting it close on a few pieces because of the modifications/changes I had to make to the subfloor framing.