I have read the articles questions and answers and am a little unsure what to do in my situation. I have an older log home with a timberstrand engineered rim joist and ijoist floor system. There is a ledger board in multiple locations. I live in the upper peninsula of Michigan zone 5. Right now it only has thin aluminum flashing over it so it can dry to the exterior but is deteriorating in some places, no caulking on seams, no protection from fastener entry. I was going to pull the flashing back to make sure all the joints were caulked. Put self adhesive siga membrane over the rim joist lapping over the through the wall flashing and going up under the log at the top and foundation at the bottom with a drip edge. Top it off with heavier trim coil flashing pushed into a caulked kerf in the bottom of the log. Also another piece of flashing tape on the outside of the trim coil to seal the ledger attachment screws or siding nails. The ledger will be flashed and attached with spacers. This will still allow drying to one side? There is limited space under the log overhang for a layer of insulation on the rim joist. Maybe 3/4″ which I would assume would not allow drying and will make the ratio of insulation off. Is some better than none?? Started replacing interior fiberglass with caulking and rigid foam but think I’ll switch to spray foam. My head is about to explode with everything I have read. Great information just trying to do the best I can with what I have. 8″ log full poured basement sill seal. Log siding over the rim joist where there is not a ledger board.  

Any guidance would be greatly appreciated. Thank you.

By the way I did have all the tongue and groove ceiling air sealed with foam per Martins guidance from reading questions. Huge difference.