As a small project, I decided to redo my closet on my main floor. I ripped out all the plaster and kept the lathe at first. I didn't pull out the baseboards or the plaster behind it. When I installed the new drywall there were pretty significant cold drafts coming from the closet. So now I have ripped the newly installed drywall out to try and fix the problem.
Searching this site and the internet, I can't seem to find a good answer on how to improve the insulation. The closet is directly exposed to two exterior brick walls with 3/4 inch furrings.
I live in a northern climate and the the brick is all above grade. There is no evidence of any moisture damage to date.
It seems like my options are to either a) compress batting and overlay with a vapour barrier and drywall, b) use foam board and overlay with drywall or c) just overlay the drywall without insulation and try to get it airtight.
Due to the condensation issues associated with brick, I suspect the c) is the best answer.
Have you read on buildingscience.com and/or greenbuildingadvisor.com? I suspect you'll read about using rigid foam, air sealed. FG and a vapor barrier would not happen at my house. How is the rest of the house insulated?