New build basement wall gets wet
Had a house build and it was finished April 2025. There’s one spot in the basement where the wall gets wet after a hard rain. Normal to light rain doesn’t affect it.
All the exterior basement walls were painted with the black rubber sealant stuff.
Before May 2026 I can tell you the grade wasn’t correct and I could see how it’s possible for water to pool in that location on the outside however I’ve never witnessed it. After some good storms this spring, the wall was getting wet after each one, so I tried my best to build up the low area for better grading and I thought I’ve achieved enough slope away from the house. However the hard rain we received yesterday still resulted in moisture on the wall (although I think less than usual; I wasn’t home until late last night to inspect the wall).
My last little hope is maybe the weep hole in the bottom channel for the house siding is allowing to much water to go along the block on the outside ?
So some questions - how does moisture get to the INSIDE of the block even when the outside is sealed? Should I plug the weep hole with silicone to see if it helps? Will it cause a problem somewhere else? What else could I ask my home builder to do (he’s been really good with helping me with issues that arise even a year later)? His last suggestion was addressing the grading.
The water on the outside of the block that’s wet is pretty much exactly where the moisture is on the inside. Sometimes there is actual water on my inside wall and not just wet looking. Not enough to leak down to the floor and pool if that makes sense.