I have a Hyundai sonata 2017 limited and am interested in some sound dampening to improve my ride a little more. My question is since it is still under warranty would doing sound dampening cause the warranty to void? What if I wanted to do full ceiling and floor, would taking out the seats and all that void the warranty or is it only things that effect the driving of the vehicle? (I do currently have an email into to Hyundai but figured I would post here too)

Also if anyone has experience in it, would you suggest bringing it into a shop or do it myself? Research shows that bringing it into a shop to have it done will significantly increase the cost than if I were to just do it myself. Though something about the thought of having it professionally done seems so much better...