Is all attic insulation fiberglass?
I live in a converted garage apartment, and the landlord mentioned once he used to cheapest nastiest stuff for insulation. It is a fluffy gray, loose material that looks dumped onto the attic floor. Reason I ask is not sure if I want to take any OCD measures (like sealing off the attic entrance with tape). I don't like the idea that the dust in the air might be fiberglass leaking in from the attic.