probably not a good idea. are you asking about insulation (pink stuff) if so, then it not good with moisture. if you are asking about tar paper on the roof then it would leave tar smell in your car.
not unless you want little pieces of fiberglass in your hair and on your clothes every time you get in the car. They make special sound dampening materials for vehicles.
too add to that housing insulation wouldnt help you with dampening it would make it worse by absorbing the sound, try talking through a pillow for example/
Both fiberglass and asphalt products are harmful to your health. Stick to brands like Raamat, Secondskin, and Dynamat.
