Hydrostatic presszure in basement floor. What is it? My basement floor was sweating, air c was not on?

Basement floor was sweating in spots. Builder said I had hydrostatic pressure. It had not rained in days. I did not have my ari conditioning on all week. I turned on my air because the tempature was in the 90's. My basement is 60 x 12 in the back and 40 x 12 in the front. I feel after the air is on for a few days the sweating will go away.

Hydrostatic presszure in basement floor. What is it? My basement floor was sweating, air c was not on?
It sounds to me like condensation. Get a dehumidifier and make sure your vapor barrier on the basement walls is in good shape. This in a very common situation.


Home builder 32yrs
Reply:You have hydrostatic pressure?? That's like saying there is temperature in your town. Sounds like there's a leak the builder doesn't want to address, but that's just from what little I'm reading here.
Reply:When I pour a concrete slab, under a roof, I trench a spider-like design, and fill with gravel( about 8" deep). Then put a plastic vapor barrier , followed by 6x6 no. 10 wire. The trench allows water to weep out, thus eliminating the "hydro-static" pressure. The plastic helps eliminate the "sweating" from excess moisture. However, if you live in high humidity areas, extreme temp. changes like you describe will always result in some sweating.