Any help would be great. My foundation was installed 3 months ago. The ground is almost all gravel. We went down 14 feet with septic and still hit no ground water. My site guy said I will never have a water problem. Now I am ready to start mechanicals in the house and am noticing ever time it rains I get a growing moisture line starting at the floor and working its way up the wall. It only happens in the deepest corner and works its way out from there. My foundation guy applied tar to the foundation then we installed 2 inch t&g foam over the tar taping all the verticle joints. A perimeter drain was installed with fabrick over the top and 12 inches of stone over the top. The house was then backfilled. I want to stop this problem before we go any further with construction. Any ideas. Thanks

Is your roof on yet? Are gutters and downspouts installed? Has the final grading been done? If so, does the grade slope definitely away from the house for about ten feet all around?

How much "tar" did your foundation person apply? Two thick brush coats, the way it should be done? Or one thin spray coat, which often fails?

Does the perimeter drain slope positively, and where does it discharge? And please don't tell me the downspouts are connected to it...Do the perimeter drains pitch toward the corner where you see the dampness, by any chance?

Not much help, I know, but the answers to all these questions will help make an educated guess educated.

Thanks Rich, Here goes. Yes roof is on. No final grading is not done because he may have dig this side back up to fix this problem although grading not being done could be the problem. No gutters yet. They have a separate drain system. Not sure on the amout of tar. It looked pretty good from what I saw when I applied the foam. Large thick pools on footing from wall.

I still wonder where your perimeter drains discharge, and if the discharge is near that corner that shows moisture.

But wait until gutters are on and the downspouts are piped to wherever they go, and until some at least rough grading is done, before you "panic"...the problem could possibly disappear.

This may be a long shot- but I put on an addition and conected a new basement with the old basement(never any water in the old basement).I sealed the new foundation walls graded guters everything i could think of!!
I finally had a roofer check out the roof. my problen as strange as it seems was a poorly constructed roof at the vallies. Copper saddles fixed my new basement.Seaping from the footers and cracks in the floor stopped.