I have a 100 year old house and was thinking of a few ways that I could save on insulating and vapor barrier. The house has already been re-drywalled once laminated over the existing plaster by the former owner so I would rather not get into a huge reno that for certain reasons is not required. I know one of the ways to vapor barrier can be achieved by stuccoing the exterior walls but that is even more expensive. One of the advantages to stucco is that the vapor barrier ends of being on the exterior protecting every thing behind it which in my case is the bricks, wood firing channel and drywall.
So my cheap alternative to something expensive was to use a product such as Thompson water seal as an exterior vapor barrier given that it's duty is to protect bricks from moisture thus perhaps sealing the house. Fill in any cracks with concrete or some other product, spray over with the water seal and Voil=E0. Does anyone know of a product that can do this or is Thompson's products good enough?
Thanks,
Carl