I have a house that was built in the 50's and the previous owner had blown in insulation in the attic but there is not a moisture barrier of any kind anywhere in the ceilings... Will this hurt anything? Will mold grow in the attic? Also I want to remodel my bathroom, but to take down the old ceiling all of the insulation will fall through into the bathroom, what do i do? I also want to install an exhaust fan, because I am getting a lot of moisture on the walls and ceiling in the bathroom and on all of the windows in my house. Please help!