My home is a 1900 sq. ft. 1962 split-level ranch- an insulating nightmare. I want to get back to woodworking in my 1car garage, but In good conscience I had to look and see what is really up in my attic providing insulation because it costs a fortune to heat and cool my house. I go in the attic and fibs insulation. Yay? No. It is yellow, underneath 3" of dirt and is only 2-3" thick.. There is a dead mouse, mice droppings, and what appears to be an attempt to dig through the drywall and drop in for a visit and meet-and-greet with my family. You get the idea- nasty! So what do I do? Go back into my garage and start renovating it because it's my " me" space. Guilt gets me, so I send my 3 teenagers with huge trach bags into the tight space (low pitch roof) with tons of safety gear. They sent about 30 bags it through the opening behind the vanity mirror. And got as much of the filth out as possible with brooms and brushes and dust pans. The floor of thie attic floor is 27'x30' and has 2x6 joists on 24" centers, so I go out and buy R19 kraft faced batts and have the kids lay them in place after arming them with spray foam and sending them to air seal first, and put in the rafter vents. After lots of moaning and groaning and a combined total of 30 hours I have a clean air sealed attic (I hope) that is much better insulated with R19 v. the R5 filthy rodent playground. So, I filled the joists cavities with the new R19 pink insulation. I know I can run unfaced R30 or R38 insulation perpendicular to the cavities I filled with R19 Kraft faced batts, or blow in fiberglass or cellulose, but I don't see how ?I would be able to achieve the recommended R value without blowing in as much insulation needed to reach R50 without going higher than the rafter vents. At it's highest point there is only about 18" between the top of the joists and the underside of the roof. Help!?