I'm trying to prepare floor for a new laminate flooring. I noticed that the thickness of the subfloor plywood is only half an inch. I researched it is recommended to have at least 5/8-inch or 3/4-inch. So that's more than half an inch.
I'm planning to add another sheets of plywood on top of the existing one. I need to know if that's OK and what type and thickness is sufficient?
There is all these different types:
Sanded Plywood Hardwood Plywood Plywood Sheathing OSB
I know OSB is not good for floors so that's out of the picture but any advice on what I need? Also how do I make sure the floors are level? Do I use shims or maybe some mix? I'm planning to screw them.
Note: The floor is laying on wooden studs directly on the concrete. There is no basement underneath. So no joists.
I'm planning to use https://www.homedepot.com/p/15-32-in-x-4-ft-x-8-ft-3-Ply-RTD-Sheathing-132411/100067329. Is that thick enough?