In the last two weeks I have had numerous cracks appear on the plaster, from one end of the house to the other. Generally, these cracks have formed around doorways and arches, and along the main beam in the that runs in the middle of the house from end to end. I can't figure out why this is happening all of a sudden.
My only guess is that a recent covering of the soil in the crawlspace dramatically lowered the humidity down there. This lower humidity could have caused the 18" posts that support the main beam to shrink slightly. Or, the lower humidity could have somehow impacted the beam itself. Does anyone have an experiences with this?
I jacked up the beam by one of the posts, and it alligned a doorway correctly (the door was hitting the jam), so it does appear to have something to do with the main beam or the posts.
Todd