I am glad to have finally joined this forum, I have visited many times.
I have a 2 storey home built in 1973, it has a 4 sided mansard roof. I live in Montreal, Canada where the winters are very cold.
Here is the amount of insulation I currently have in the attic:
Underneath the blown in fiberglass, I have fiberglass batts between the rafters.
The home always feels cold in the winter, although I also have many of the original windows which have not been changed yet.
Do you think I have enough insulation in the attic, or should I add some blown in cellulose on top of it?