On 09/03/2012 02:37 PM, Jason McBrien wrote:
  If there is that much humidity, however, something is
wrong with your
 mother's house. I'm guessing there are leaky windows that let in too
 much outside air. Warm, humid air from the outside gets in, hits the
 cold basement walls and condenses. You could replace the windows, or
 put plastic over them to decrease the amount of outside air getting in. 
If we set drainage aside, you have to look at more things than your
windows. One thing to realize is that concrete is far from water proof.
You can have a lot of humidity enter your basement through the floor and
walls. What you want to do is reverse the flow. You actually put
insulation on the outside of the house (yeah, you will have to dig up
your house). Wrapping the basement in plastic is a no-no, it will trap
humid air and could increase your problems.
http://4.bp.blogspot.com/_VOQwStvU71M/SrsbwMDKU2I/AAAAAAAAAX8/SFoiq0BoyDE/s…
Cheers,
Pontus.