1HandyWoman wrote:

I have a house that I swear was designed and built by an idiot. It is now
22 years old and literally falling apart at the seams and everywhere else.
The question/problem I have today that I can't figure out is this.

The house is build on a cement slab, the slab extends out from the
foundation on two sides (side and back of house) and is level with the
foundation. This means that the sill of the house is sitting at the same
level as the "outside" slab so when it rains the water runs down the
house, hits the slab and rolls under the sill and rots out the sill, the
siding, and the trim that have all been installed down to the slab. I hope
this is understandable I have added pictures below.

Now I have removed the rotting trim, siding, etc and can see rot of the
sill board happening. What can I do BEFORE I replace the siding and trim
to keep water from running under the siding and trim and rotting it AGAIN
and further rotting out the sill board, etc?

Any idea without just demolishing this whole stinking house?

Jack the whole house up (slowly and carefully) and build a single course
block wall with grouted (filled) cores under it. A little refinishing
inside and your water problem is fixed and you've gained ~8" of ceiling
height as well. Also rent a concrete grinder and grind the outside
concrete to a reasonable 1/4" per foot slope away from the house.