Sound deadening, Carpet, and floor pan repair questions

On my Barracuda I used Kilmat, and UltraTouch denim insulation from Home Depot. The denim insulation is about 1/2" thick a has a foil side and is glued over the Kilmat then all seams and edges are then taped with foil hvac tape. Works well. I first seen it used in light aircraft.
Aircraft Spruce & Specialty Company sells a version of the UltraTouch with foil on both sides.