Re: leaking poured foundation, is my curtain drain working
gorgasd ..... one thing regardless if you have a 12 inch thick poured concrete or block wall .... there will be cracks. However .... only after 1 year you shouldn't expect to see what you are experiencing.
The cause of the crack is difficult to say . If it's localized in this one area it may be from improper tamping of the undistured soil under the footings or a cold pour joint at this area.
Having said that .... digging out the area and patching the crack on the exterior and coating it with an elastomeric waterproof coating ( not the black tar like damp proofing currently there ) along with a drainage membrane would be a preferred method. Using epoxy or hydraulic cement to fill the crack work equally fine .... doing this to the interior doeasn't matter other than for asthetics.
As for the perimeter drain .... if they don't seem to be functioning then the builder should be excavating the entire perimeter to either repair or replace the drains.
Ideally for only a few pennies extra per foot they should have used the black plastic drain covered wih a filter sock. This "sock " keeps soil from entering and plugging the drain system .
If you can convince them to do this I would suggest they redo the exterior foundation waterproofing described earlier for the patch.
This way any cracks that will eventually occur will be protected by the elastromeic water proofing coating and the drainage membrane on the exterior from water infiltration.
Hopefully this helps.
"" an ounce of perception -- a pound of obscure "