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?