Hi, My Basement gets wet after large rains and snow melts. It is a 90 yr old house with a concrete block foundation. I do also see efflorescence in some spots as well. Generally from what I can tell the water is getting through at the joint between the wall and the floor and around some blocks in some places. What would be our best option to fix this? Right now I am weighing two options, digging a trench and sealing the interior. My problem with Digging a trench is that I only have about 5 feet between my house any my neighbor's property (city block). Also, I have some large trees near where I would want to dig and I am concerned about the roots getting in the way. On the other hand I heard that concrete sealant (like Radonseal) is not the best option as the water will still get into the brick. Thanks for your help.