We live in an old farmhouse with an addition added onto the front approximately 1930. The biggest issues that we have are:
A. When they added onto the front, they knocked out the north section of the basement wall and never replaced it, causing the house to "cave" inbetween the old and new sections - what is the best way to go about fixing this? House jacks? Should we bother replacing any of the wall in the basement (we do not use for anything, not even storage)
B. The addition has some flooring that is rotting and there is no subflooring underneath. What is the best way to replace this?
Any help/commentary would be appreciated.