Chris writes from Saint Johns, Michigan: "I know that the best place to insulate the attic is between the floor joists. But the attic in my 150 year old farm house has a 1-inch thick oak floor planks which would need to be removed to get the insulation in there. I believe it would be almost impossible to remove the flooring to insulate the ceiling of the dining room below without a huge amount of work and destruction. There is a little window on one end of the attic and the door to the bedroom on the other, but no roof or soffit vents. In this case, would it be of any benefit to insulate between the rafters? What do you recommend?"

Answer: In your case it would be better to insulate on top of the floor, without removing it. If you insulate the rafters you will be heating a much larger unused space.