I have gotten estimates from some contractors for installing indoor drainage in my basement. They'd be breaking into the concrete floor around the edges of the basement, right next to the basement walls. The basement walls are brick, the home is about a hundred years old. I'm told there's a good chance there is no footing under the walls.
One, but only one, contractor said it would be necessary to pour concrete as they go in order to sort of create on-the-fly footing.
Other contractors did not mention this.
But the guy who did mention it said he thinks his company is the only one that takes this lack of footing into account when doing this kind of work (plausible?) and that it's very important to do so (true?)
So my questions are, is it dangerous and how dangerous is it to install this kind of drainage system in a home without footing, and is it plausible that only one company in Indianapolis actually does anything to alleviate that danger when installing this kind of drainage?