The people from RISE Engineering gave us a proposal to put 14″ of insulation in our attic. The attic had a room in the back that needed to be demolished. Since we wanted to use the attic for storage and the existing joists were 6″ deep, I put 2″ x 8″ joists, perpendicular to the existing joists and demolished everything that had to go. I know from my bill at the dump that I removed 3000 pounds of garbage. In the process, we updated all knob and tube wiring to modern romex. In all, it’s really clean and satisfying to be done with such a major project.