I picked up my DIY foam spray kit to insulate the rim joists in my basement this morning. I was all pumped about taking care of the job this weekend. While reading through the user manual for the Touch n foam kit, it said that the two part foam produces heat when it is expanding. My kitchen was redone about 20 years ago and insulated with batts with the paper vapor barrier on it. As this foam expands and comes into contact with this insulation I am paranoid that the paper could catch fire, any thoughts.