Today I took down a 2x4 piece of drywall in the ceiling of my kitchen. I noticed, when it started raining loose fiberglass, that there is no vapor barrier between the drywall and attic insulation.
My question is, since I am going to add more insulation on top of what is there, is there a specific kind of material I should use? I am not going to remove the existing insulation, so what ever I have installed will be blown in on top of existing fiberglass. Thanks Rich
The most important thing at this point is that you don't add insulation that has a vapor barrier on top of insulation that doesn't. This would trap moisture between the drywall and the new insulation. If you are adding blown-in insulation, you won't have this problem.