For the past several years, my basement leaks during heavy rains - a large puddle will cover as much as a third of the floor. I've tried improving things outdoors, but it hasn't had much effect. I'm tired of water vaccing! The only floor drain is in a closet in a part of the basement that remains dry. Is there anything that can be done, short of paying thousands of dollars to have a trench and sump pump installed? I think I know exactly where the leak comes in, but it's behind a thin wall panel. I am NOT handy, unfortunately.