Hi,

In working in my kitchen, I uncovered this mess in the floor joists
near the door.

http://freeboundaries.com/mess.jpg

I'm faced with the problem of how to fix this situation. I have cut
off the part that was completely rotten. The joist right in the middle
was sistered to give it the right height. There are two sisters
because the carpenter didn't get it right the first time.

What you see down below the joists is a stone wall. I don't think it's
flat enough to provide good support, i.e. if I were to put some lumber
on it.

I would appreciate any suggestions on how to fix this problem.

Many thanks in advance,

Aaron