Osb, T1-11, or plywood is not the final outside layer that is exposed to the elements in most homes. I can't imagine that passing anyone's local inspection.
The thread title is "Plywood ALTERNATIVES". Sorry I struck a nerve. If you want to build an outdoor structure comprised of glued sawdust...
There are structures all across the nation well over 100 years old that have used rough sawn lumber as their siding. Most are still standing today. We will be hard pressed to ever get similar service out of plywood. It has its place, but it's not for exterior use. IMHO it has no business in a...