MissKat
Expert Expediter
We have cherry flooring with the etrack flush with the surface of the wood. We bought the long rolls of the insulation at camping world quite reasonable. Used spray tack and construction adhesive, then tap screws into the frame of the van. Have large eyebolts in the sides. Put the foil on the floor prior to the cherry. Then bolted the wood through the floor to the underside. Totally soundproof and comfy womfy. Looks like someone's freezer when you open the doors lol