The problem, at least in my case, is that my 1930 house has k&t wiring and little/no insulation. The easiest way to add insulation would be to blow it in throug

The problem, at least in my case, is that my 1930 house has k&t wiring and little/no insulation. The easiest way to add insulation would be to blow it in through drilled holes. This is a lot less involved than rewiring the house. I have no affection for the wiring - nostalgic or otherwise. And, yes, vapor issues.