Our recently purchased and renovated home has had some issues with water in the basement due to cracks in the foundation. The basement is finished so finding the crack(s) was difficult. As it turns out, due to an unfortunate timing of the sewer lines on our street being replaced right when a massive storm hit, every house on our street had massive sewer basement flooding. So, we have our entire basements drywall currently opened up to 2'.

In doing so, we found several other cracks around the perimeter wall with signs of water leakage, and have decided while its open to look into a drain tile system. We have had 2 consultation, one with a smaller local company and another with a much larger company, both well reputed. What throws me off is that the smaller contractor says they can do the drain tile install without cutting out any of the perimeter studs from the finished walls. They said they try to do as little additional labor work as possible and they can work around it. I find myself perplexed that they can do this and do it right, as my finished basement has studs along the floor of the entire wall almost. Attached is a picture of a section we opened up, but the whole basement is like this.

Is this something common, or even really practical while still being able to get the job done correctly? It does save a significant amount of money but its not something I even suggested or asked about they just came right out and said they would not need to remove any studs. What do you think??