Plywood under wood floor on slab foundation?
We're getting ready to add on a dining room, and are doing a little kitchen remodel at the same time. Kitchen has 8 inch white tile, in fair shape but dated.
We had engineered wood floors put down in living room several years ago, and it is not holding up well.
I've been looking around at floor options for the kitchen and dining room and the smaller flooring stores have been telling me (for wood flooring) that the flooring will hold up better if it has a plywood layer under it.
NO ONE locally told us that when we put the engineered floor down. We are in central Texas, and a friend in NC whose husband does repo repairs said it is common there.
So, is it necessary? Is it better? Worse? Why?