old windows, condensation between panes
I just bought a new house, and in the upstairs there are 2 old windows (dates on the sides show 1970-something) that are fogged up. Moisture is built up between the panes of glass. My home inspector says that won't affect the insulation, but the windows are barely able to be looked through.
I recently heard that Wallside and some other companies warranty the windows for life, no matter who owns the home, and a friend thinks they are wallside windows. Does anyone know if the warranty would cover this problem? Also, would anyone know if I called Wallside and gave them the home address would they have any information (i.e. could they tell me if they were their windows)?
The other route would be to just replace them myself (if the above doesn't pan out). Anyone have any idea what they would cost? The windows are upstairs, about 24" x 36" or so (just an estimate), and they slide vertically (not sure what the style is called).
Thanks for the info everyone.