I have 100 sq. ft. and I've gone through less than half a roll doing the firewall. I'm figuring I'll probably need another 50' roll to finish it up. Being my car is a fastback I have a little more area to cover.
As for a comparision, this is my first time installing sound deadener. It's just thin foil, tar paper, and adhesive. The difference between brands must be the thickness...
