Quote:
Originally Posted by NYTom
It's the basement actually, I have it in a few areas, the stairway wall, and some spots on the floor. I never get water in my basement in the 16 years I'm there. I know it's caused by moisture, but can't figure this one out.
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Take a good look around your home. Even better to do during a big rainfall.
Check the downspouts. Make sure they are working and all flow diverted well away from the house. Check the grading to make sure all water is diverted away from the home. Make sure your gutters are clean and don't overflow when it rains. Make sure your outside hose bibs don't leak.
When water flows to the foundation or pools near the house, you will eventually get moisture in the basement.
The moisture source could also be internal (i.e. washing machine), especially if there is not good air circulation.
Here is a good link on the topic:
Moisture in basements: causes and solutions : Moisture Management : Housing and Technology : Environment : University of Minnesota Extension
Year ago i had a moisture problem in a basement. Drove me crazy trying to figure it out. Then i decided to look outside during a big rainstorm. Turns out one of the downspouts had an issues which was only apparent during a big rain. Water was flowing up against the foundation. Simple fix and the basement stayed dry.
You definitely want to correct any moisture problems before doing anything to or on top of the concrete floor or walls.