So...I live in an old house , about 220 years old. We bought the house about a year and half ago and absolutely love it. For the most part, the house is in great shape, but I will say, nothing in the house is square or level. This wouldn't concern me in the least except I seem to notice from time to time that a door here or there doesn't seem to close as easily as it did before or might stick slightly in a new way. Is it possible, even after all this time that the house is still shifting? Is there any way to test it? I haven't noticed any new cracks in the plaster anywhere and the foundation is all fieldstone. I just want to make sure we're doing everything we can to make sure the house stays in good condition.