So, we are looking at celluose and he recommended an R = 39. They would spray in ontop of the existing fiberglass.
He tells us fiberglass doesn't hold it's R value, is that true?
Also - what problems can you have with the cellouse. We have a cat with bad allergies and I'm worried about all the dust. We also have an attic fan and he claims that after the insulation settles, it won't be spread around by the fan. Is this true? I don't want to be fighting dust in the house. I'm already going to have to build a box around the entrance as it is.... I'm think fiberglass is a better way to go - but I'm told it is considered carcinogenic....
I apprecate your insights!