Recently I installed ¾ x 3oak hardwood floor throughout most of my home. The sub-floor is ¾ T&G plywood to which I added 1/2 plywood to the floor so I could go parallel to the joists. I have two smaller bedrooms that I am about to do the same unless . Both rooms have a laminate (Pergo?) floor installed 20 years ago that is at the same level as the sub-floor with the added 1/2 plywood. My question is can I install the ¾ x 3oak hardwood floor over the laminate or do I have to rip it up?