we had several cracks in our foundation walls repaired with epoxy injection, which are covered by a lifetime warranty by the contractor. after this work was done, we had an interior drain tile system put in. when they were excavating along the wall with the cracks, they found that one of the cracks actually extended down to the footing -- so the epoxy didn't go far enough below the floor to seal the entire crack. this second (drain tile) contractor said he would seal the crack with epoxy before putting in the drain tile. now the drain tile has been completed for over a month, and we are seeing efflorescence right along the wall/floor joint where this crack is. we've never had any efflorescence problems before, so i'm assuming the problem was made worse by uncovering and then recovering the cracked area with concrete when they put the drain tile in. i also strongly suspect that the second contractor never injected the crack, and instead just put the drain tile in and covered the whole thing up. i don't really want to call this second contractor back, because they did such a half-assed job the first time, but we obviously really need this fixed before finishing the basement. will they even be ABLE to do this -- re-open the concrete they just laid, remove a section of the pipe, and get at the footing to inject -- and put it back without affecting the drain tile system in place? what are my chances that the first contractor (the crack guy) would do this for no charge, since they should have seen the crack extending below the slab? help!