Jon writes from North Carolina: "I'm turning my attic into a second story/upstairs room and I've put Owens Corning R-30 foil backing with the foil side facing the second story subfloor. Is this the correct or best way to install this insulation??"

I am not sure I understand where you put the insulation, Jon. If the insulation is in the rafters and the foil facing is on the side toward the subfloor, that is correct. Of course, there should be a 1" space for ventilation between the insulation and the roof deck.

If you have installed the insulation between the "new" attic space and first story, I have a question: Is the "new" attic space going to be heated?

• If yes, there is no need for thermal insulation between the two floors but you should receive some acoustic benefit.
• If the "new" attic space is not going to be heated, then the facing will go toward the warm side.

Silly question, perhaps, but I just want to be clear for you and others who may read this. Thanks for the question.