Re: Sealing an exposed exterior concrete foundation wall
Sounds as though the issue is simply a case of warm moist air within your basement contacting the cold surface of the concrete.
Originally Posted by Meeko
The area above ground level will be the coldest portion since it doesn't have the soil to act as an insulator.
Adding any type of paint on concrete sealer really won't help ..... adding insulation would raise the temperature of the concrete preventing the condensation.
Using the foam sheet would work for this area .... however putting it on the outside prevents the concrete to breathe. It would be benifical to apply it to the inside though you would likely be required to cover it with something like drywall for a fire rating.
Also .... regardless what type of insulation is used it needs to be air tight. In other words there should be no air allowed to circulate behind any insulation for 2 reasons.....
- moving air will reduce the insulating performance.
- you will still end up with condensation behind the insulation.
Just a thought.
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