I posted this question in the "building" section and recieved only one response. Since its about an existing house, I thought I might have better luck here.
I have a new addition that was poured on ledge. My problem is I have standing water puddled inside the crawlspace, and I want to get rid if it, but here is the problem:
Think a large flat rock. Now, carve a bowl into it about 3 feet in diameter and 1 foot deep in the middle. Now, pour a foundation through the middle of it, so 1/2 the bowl is inside and 1/2 is outside
The exterior foundation was backfilled with dirt and planted. What is happening is that water is leaching down and getting trapped in the "bowl" on the outside, and rising on the inside.
I am trying to figure what I can do. I would like to avoid a sump situation.
I was thinking to either fill the bowl inside with a bag or two of cement, or fill the outside bowl with cement. A french drain along the foundation exterior will not work well becuase not matter what I do, its still a low spot and water will not flow "uphill" and out of the "bowl".
I am also concerned that since the water is traveling between the poured fondation and the ledge, that the water between the two will freeze and potentially heave the foundation.
I am leaning to stop the water BEFORE it enteres the house.