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Is rolled insulation better than blown insulation?
I've heard blown is better because it works under compression. By rolled, I assume you mean rolled fiberglass which when compressed by even gravity loses r-value. You have to keep fiberglass fluffed.
By blown, I assume you mean cellulose.
I would get a more professional opinion, however, and consider other types as well.
In an open, unobstructed stud bay, there isn't much difference, but in the real world, you don't really have many empty stud bays. Most of them have pipes, wires, electrical outlets & switches, HVAC ducts, etc. Fiberglass batt insulation is hard to fit around these obstructions. Even when carefully installed, you will generally compress the insulation behind pipes & wires, thus reducing it's R value. Blown-in cellulose readily conforms to all of the obstructions, effectively giving you a better overall R value.