What would cause certain parts of the basement floor to get puddles of water, even though a sump pump is installed and working?
I have a sump pump in my crawlspace. It runs during heavy rains (and for several days thereafter). Most of the time I have no problems with water in my basement.
When it rains a lot in a short period of time I will get some puddles, apparently ground water coming up through the floor. One such puddle is in the crawlspace about 10 feet away from the pump. Another is in the laundry room, about 20 feet away in the opposite direction. Most of the time these puddles drain quickly after the storm.
However, during the recent event (which granted is a ridiculous amount of rain in a short time) I got puddles in many areas of the basement. In some areas the puddles are still there, even though the sump pump has been running constantly.
I assume the purpose of the sump pump is to prevent this situation, so what more do I need? I realize this past storm was a freak of nature and almost everyone had water problems. Still, it is my understanding the sump pump should pump out the water before it reaches the floor.
Is it simply a matter of making sure to address the drainage outside? I have the ground sloping away from the house in all directions and the leaders extend 6 feet or more.