I'd like to create a modern interior door. No rails/stiles. Just horizontal stacked panels stained. I plan to use maple or birch.
I don't want to use a paper-thin hardwood veneer plywood. I've read that gluing thicker wood to ply will lead to failure. So, how do engineered hardwood manufacturers manage to glue veneer 5/32" thick to ply core?
How were slab doors done in the olden days done? Solid wood? If so, how did they avoid wood movement issues?
What's more likely to prevent warping: solid wood frame with mortise/tenon or say baltic ply core?