We have an old, 1911 house in Minnesota. Our front room is a converted porch which is drafty and quite sloped. Our plan is to rip up the old linoleum floors, get down to the joists, and essentially rebuild the floor to be level with the rest of the house.
My question is about insulation. The room doesn't have crawlspace access, and since we are taking up the floor we want to insulate the floor to help keep out that cold Minnesota winter. We plan to put down a vapor barrier, but aren't sure what insulation to use. We would like to stay away from fiber and opt for something more environmentally friendly. What insulation should we use? And any tips for leveling and insulating floors when you don't have crawlspace access?