We purchased a farm 2 years ago that includes a 2,000 sq ft, 2 story bank barn built sometime around the turn of the 19th/20th century. The oak beams are hand-hewn; floor joists are tree limbs with the bark. We put a new roof on it last year.
However, the main sills have slipped approx. 6" on its massive concrete foundation. We could use advice on corrective measures. Thank you.