I have an old 1916 house and the unfinished basement continues to leak after many attempts to stop it. I added new gutters all around the house, and when it rains the waters flows through the downspouts properly. Also, there's no obvious areas where water is pooling or spilling-over from the gutters. The water enters in 2 distinct locations adjacent from one another. It only leaks when there's a down-pour, or a long period of rain. If it rains mildly all day, it won't leak, but if the rain continues through to the next day, the leaks will start. In one location, it follows an old tree root into the basement, and on the other side of the basement it permeates the wall until there's a steady flow. The house sits on a slight slope, whereby water flows from the front to the back of the house. There's a long concrete pad that runs down one side of the house to direct water to the back of the house, and I once covered it with a huge tarp to ensure 100% that water wasn't getting through the cracks of the pad, but to no avail; water still flowed through the basement walls. The house sits on pretty firmly packed grounds, so I really shouldn't be having this problem. Any help that you can give me will be greatly appreciated.