My neighbour had his 50-year-old foundation “waterproofed”, which looks like they just screwed on a membrane on the outside, replaced the weeping tile, and filled it back in with the dirt/gravel that was there originally. I guess it’s better than nothing.

One thing the contractor told him though is that the weeping tile does not need to be sloped, it kind of just lies there and collects water. That doesn’t sound right to me. Is that really how they are intended to work?

On the one hand that makes sense, since the footings are horisontal and getting a slope to go all around a house would be a non-trivial engineering exercise.

On the other hand – if the water doesn’t flow out through the weeping tile, what’s the point in having it at all? Wouldn’t a pile of clear crushed rock serve that purpose just as well?