I have loose fill fiberglass insulation in my attic (picture below). I was thinking about upgrading the insulation because, from what I’ve read, this is one of the least effective insulation types.
I was thinking about buying pink fiberglass rolls, clearing the loose fill out of the joist bays, putting the rolls down, then putting the loose fill back over top.
1) Is that a good strategy or should I be doing something else or using a different type of insulation?
2) If I buy the rolls, should I buy faced with a vapor barrier, or unfaced? The loose fill currently has no vapor barrier. It just sits on top of the drywall.
3) Is the cost of doing this really worth the difference in your energy bill?