I did not find any threads using the search functions so I thought I would throw this question out there. How do I insulate a +100 year old stone (limestone) foundation to limit heat loss (in Winnipeg, Manitoba)? I have come across conflicting advice and am unsure of what to do ... closed cell foam, blue board, pink, etc. Any comments would be appreciated.
PS some additional details ....
-exterior re-parged, water proofed (though I am questioning the permeability of this as it occurred 15 years ago) and weeping tiles installed
-interior weeping tiles installed with water proof membrane at base of wall, deep (4') perforated sump, poly barrier under new basement floor ... just completed
-above ground temp range 35C+ --> -35C