I own a house in southern Ontario, Canada built in the 1870s. It has wood board and batten siding with no sheathing from what I can tell, and lathe and plaster walls on the inside. There is no insulation in the walls and most of the windows are original. For such an old, drafty house the heating bills are surprisingly reasonable. The siding and exterior trim is in rough shape and will need to be replaced soon. I have read a lot of opinions about insulating houses like this one and creating moisture issues in the walls. When I remove the siding that would be the time to insulate. Should I bother insulating at all or if I should then what would you recommend? Thanks!