Attached are some pics from one side. Other side pics are dark due to weird camera setting so I did not upload. But other side is completely clean as compared to the one in images here. After removing vinyl siding ( as shown in attached pic) , I am seeing little soil attached to bottom end of OSB. I checked everywhere but I did not see any termite. However the more and more steps I removed, there were ants ( not the wood eater ants though ). So I am suspicious that this soil attached to OSB is from ant or other insects but not termite. Here is what I am planning to do now and please let me know if there is anything I am missing - 1. Use wood hardner and wood filler on the Rim that is little damaged. 2. Cut the OSB which is damaged and replaced with new one. 3. Use termite spray everywhere. 4. Use a quick fix sealant tape on OSB ( specially below door) . 5. Install vinyl siding. 6. Go ahead with wooden steps project and keep little space from house for a ledger ( installed using 2 independent posts ) Please guide me - if I am going in wrong direction or anything else that I should consider. Thanks in advance.