Help! Condensation on inside of fiberglass insulation
Our 5 yr old house has a walkout west exposure. The 2 x 6 walls were nsulated with R-21 fiber glass and covered with a poly sheet vapor barrier. While stapling some loose corners of the vapor barrier today I noticed considerable condensation on the inside of the poly and on the insulation itself.
When I removed the poly sheeting I found the insulation wet on the basement side but dry and hot on the outer side of the fiber glass. With the 90 degree heat and humidity outside and the cool basement air inside I guess I am not surprised. I suspect the cement board siding may actually contribute to the problem by heating up more than wood siding.
The question is, what can I do to resolve the problem? That is, short of heating my basement in the summertime!
I am in the process of converting the area to living space and will soon want to sheetrock.