Just in the finishing stages of building our new home and are about to start the flooring. We have hardwoods going down in most of the house with the exception being the mudroom. (We opted for vinyl in there because of the heavy traffic, laundry, etc.) So the question is, do we need to do some type of underlayment to bring the surface up closer to the 3/4″ level of the hardwoods? We have Advantech as the subfloor but I’ve heard from several sources that we need to put some kind of underlayment, preferably luan, to make it a smoother, nail free surface to put the vinyl on. Any thoughts? Also, how do I pick out a good grade of vinyl versus the cheap, rip-it-on-moving-day builder grade stuff?