Hello, I have a small cabin that is made of concrete block construction. The interior walls have a black insulating/ fireproofing(?) sheet mounted (glued) to the blocks, covered by a sheet of panelling. Construction is of 1960'S/1970'S. I am wanting to apply a 3-4 foot band of beadboard at the base of the wall, and a layer of sheetrock above that to the ceiling. My question is, What is the best way to apply these items and retain what insulating value I currently have, and also be solid and secure?