Your house is too air tight, which means you do not have enough air movement. What temp do you keep your heat on, and what is your Relative Humidity reading right now along with inside & outside temp. If you want to be able to read various areas in your place for temp & rh, grab one of these http://www.radioshack.com/product/index.jsp?productId=11361230 and two extra sensors. That will give you four areas to read around the house, to see what is going on.
Does not surprise me with you being in Canada, that you are seeing a dew point at that level, causing the windows to sweat. I only get a little condensation on my windows at along where the bottom of the aluminum meets the glass, and that is only because we have black out/insulating drapes in our place, so not much air movement allowed around the windows.
Does not surprise me with you being in Canada, that you are seeing a dew point at that level, causing the windows to sweat. I only get a little condensation on my windows at along where the bottom of the aluminum meets the glass, and that is only because we have black out/insulating drapes in our place, so not much air movement allowed around the windows.