I am looking for some help. I am residing in Southeastern PA and I reside in a 60 year old end unit. It's a brick structure with balloon framing. I need to insulate the "attic" space. It's approximately 400 +/- square feet. I can only assume that blow in insulation is preferred only because it had been used prior, but it's old and settling and missing in areas. Do I blow it in a fill as much of the space as possible or do it just fill the ceiling joist area. Also do I need to be careful not to cover the wall stud spaces as to let the air circulate or can I/should i fill that space too?
Thanks to all in advance