Brett here is a link to what they installed in our house. As you will see it totally fills in the space. They stapled a cheese cloth type material on first and then poke a small hole in it to apply the insulation. Not sure it is DIY but might be worth considering.

http://insulation.owenscorning.com/homeowners/insulation-products/propink-loosefill.aspx


The road goes on forever and the party nevers end...............................................