There is 3 feet of slab emerging behind my 80 year old garage. It has a
1/2" joint filled with tar (see photo). The joint runs under the back wall (cinder block) into the garage. I've dug out about half of the tar in the photo below. The leak appears to be at the top where the joint meets the masonry. At that point I can stick a screw driver most of the way through into the garage. The screw driver comes out with dirt on it. (The slab was covered with soil and dirt does come through with the leaking water). Any advice on how to seal this would be appreciated.+-------------------------------------------------------------------+ |Filename: leaking concrete joint.jpg | |Download: