I've been using various grades (and sources) of baltic birch plywood for many years and it's one of my favorite materials for a lot of applications. I've heard of Apple Ply many times and understood that it was a domestic source of product that is very similar to baltic birch plywood. I recently visited the States Industries website and was surprised to find that their birch wood inner plies are actually imported from the other side of the globe. They simply do the assembly in Oregon.
I'm thinking more about the environmental and financial costs of shipping and am curious about what products might be available for some of my purposes that won't require shipping around the planet. Does anyone have any leads on high quality, thin ply, wood composites that are produced in North America (and preferably the mid-west)?
BTW, I've used some Advantech (Huber wood) sheathing for a few projects and am impressed with it. It's obviously very different from baltic birch plywood but machines nicely with a CNC and has great moisture resistance. I believe that the wood in it is grown in the US but would love to know for sure.