I have 5 1/2" of batt insulation in my attic, clearly insufficient. A significant portion has laid flat or been compressed over the years of putting stuff in the attic. My question is can I simply use blown in insulation to fill the 2x6 joists before I lay a cross blanket on it or do I have to replace the compressed batts? I no longer plan to store anything in the majority of the attic.

Thanks for the advice.