For starters, we found wet carpet in a finished basement room. It's not a full bedroom because there is no egress window, but does have a small window approx 2' x 1' about 3 feet away from where the leak is isolated. I isolated where the leak is by peeling back the carpet and de-humidifying the room, since its behind finished drywall. After the cement dried out, you can visibly see the moist area where water is leaking down onto.
So the plan is to tear down the wall around the leak, look for mold, and see if the entire drywall needs to come off since the carpet was wet along the entire length of the wall. I'd like to take the opportunity to turn our 3 bedroom into a 4 bedroom by putting an egress window in, since it can't be legally considered a bedroom without one.
Is this a DIY? What special considerations do you need to know when cutting into the concrete? We have an older house, and the basement walls have bowed and were I-beamed quite a while ago. I have a neighbor into real estate who says its actually a pretty simple process as long as you are careful and know what you are doing. What can go wrong? Is this a hard DIY?