Basement has interior drain and pump - still flooded
Looking for some advice here - we bought a house completely rennovated inside and out by a well known/reputable architect and investor. One thing they did was lower the basement floor, add a drain system (interior french drain and sump pump) and finish the basement. They seemed to pump concrete in between the original foundation wall and the floor.
We had a drenching rain last week (5+ inches locally) and my basement got water.. enough to completely saturate the carpet and ruin moldings.
I was surprised because I thought the drain was supposed to prevent this. Sump was running non-stop, and I could observe water flowing from the drain pipes to the sump well.
I also observed water flowing in from the joint between the floor and the wall in certain areas.... not the sidewalls. Also saw water stains around the sump - but not sure if water came out of the well, or water rolled in from the surface of the basement floor.
Any ideas what happened here and what the fix could be? Drain not installed properly? Sump pump not powerful enough?