I'm assuming your concrete was just poured and is curing? One of the
byproducts of curing concrete, both due to evaporation and the chemical
process itself, is water usually in the form of vapor. This then condenses
on any colder surfaces (windows, walls, etc...). So assuming your concrete
is in a curing state, this should be normal. If this is concrete that has
been down for a while, you may have other issues.
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