Our dining room and living room are separated by a wall with a large opening that had been french doors. The door sill was being bowed in center from downward pressure on both ends; we found out there was no support directly under these ends. A contractor moved support to both ends of the door opening, and cranked upwards. This straightened the sill considerably, but I believe the straightening was done too quickly, as we have been getting more and more cracking of walls in many rooms since - upstairs as well as main floor - over last 4+ years. I was hoping it would stop after a year or two, but seems it has not. What do we do?
We purchased the house in 2004, it was originally built in 1929, and is an old summer cottage that was added onto - second story pushed out to make it larger.