A question about insulation of a basement.
First, the house is built near Montreal, Québec, Canada. Climate, cold in winter and hot and humid in summer. To give an idea, -30 C to the coldest in winter, and + 30 C maximum in summer.
The wall of my basement is constructed as follows:
The concrete wall is underground for 2/3 (2/3 of the bottom ... of course!). A membrane was installed on the outside and a drain installed to correct water infiltration.
Inside, a 1.5 inch air space was left between the concrete wall and the wooden wall.
The interior wall of 3 1/2 inches is made of wood insulated with rock wool (Roxul).
A plastic air barrier was sealed on the wall, so inside.
I suspect that the air space is harmful: possible convection and condensation. Can you find me serious links, supported by science explaining why this is bad, if that is? What is the risk of this construction?
Now what can I do, do I have to do with this wall?
(sorry for my english... google translate help me a little bit!)