DEAR TIM: I’ve got a sliding patio door on the back of my home. There’s a moisture problem directly under the door in the basement. The gutters are clear and the patio is level. I plan to seal ...

Q: I've got a sliding patio door on the back of my home. There's a moisture problem directly under the door in the basement. The gutters are clear and the patio is level. I plan to seal between ...