I have a semi detached house in Toronto Canada.
The house built in the 1930's is double brick wall. The house is original and has little to no insulation right now. I want to insulate the house from the outside with as high R value as possible.
After insulation I was thinking James Hardie siding.
Apparently brick is a problem because you need something to fasten the insualtion and siding to and apparently James Hardie siding is heavy I have been told.
Rigid foam or Spray foam?
I need advice on best practice.