I have a home owner who is having a fit, because I marked the report for insulation unknow. Instead of marking each box for the walls, celling, floor, etc, and give the R-factor for each. Said it would increase the value of her home by 15% because of the savings in heat and cooling bills. I also cover it in my addenda that I am not a home inspector and have no knowledge of the insulation. How do you cover you back side on this? I was always told to mark it unknown.