I live in a cape cod in Northern Illinois. The brick chimney that is used to vent the gas furnace and water heater runs through the interior space of the house. The walls built around the chimney are completely uninsulated.There is also an open air gap between the chimney all of the floors. I can see from the basement to the attic.
Should I be filling this gap between the chimney and the rafters or will this create some sort of moisture issue.
Also, I have already insulated the walls that surround the chimney in a room upstairs with ridged foam insulation and did not disturb the airspace between the chimney and the back of the wall (approx 1 1/2" - 2"). Will this cause any moisture issues?
Any advice would be appreciated. My first child is on the way and I want to make sure that room upstairs is not a icebox in the winter.