We have just moved into a new house (house is 5 months old). After a day or two of heavy rain/thaw I noticed several damp, bordering on wet spots on the basement floor. The walls are all dry, we have a sump pump, which is empty and has never come on, and half the floor was painted with a latex floor paint two days ago (other half to do next week). Is the dampness normal? We moved into the house in the fall and have not experienced heavy rain/thaw since in the house.
I don't think the dampness is normal. Have you check the underside of the upper floor? You may have a leak that shows up in the basement. A friend had a leak at the dryer vent. The water ran through the vent pipe to the middle of the basement before it dripped.
Thanks for the advice. I checked the areas you suggested and found a drain line overflowing that runs from the first floor laundry tub to the basement drain. I cleaned out the line and no more wet spots! The water was not coming in through the floor like I thought, but overflowing from this line onto the basement floor.
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