Karen writes from Fairfax, Virginia: "I have a sunroom that sits on stilts (so there is about 8 feet of airspace below the room's flooring. I want to replace the current R8 insulation in the room's floor (which I can access from below). Can I add new R30 insulation on top of the R8 or do I remove the R8 first? And how do I handle insulation? Do I need gloves or anything?"

Answer: You can insulate directly over the current insulation using an unfaced product. I recommend using gloves, protective eyewear and a mask. Although fiberglass insulation is not dangerous it can be irritating to the skin.