I have waterproofed my basement completely for three sides (digging and using membrane and installing weeping tile), but for the remaining side which is a sidewalk, it would be too expensive to bust all the concrete. For the sidewalk, I have sealed the edge between the sidewalk and where it touches my house from the outside.
But for a section of the side walk side inside the house, I have seen water still accumulates after raining. I have ripped out the wall, and found no cracks on that wall (just some honey comb), and it looks as though the water came from the bottom of the wall (but I see no obvious cracks).
I have asked a contractor (foundation/concrete guy) and he said he can put special mix of mortar at the corner at the end of that wall.
My question is, what do you think causes the water in that section to accumulates? And do you think the contractor's mortar advise is the way to go?