I'm going to be replacing this front door with a new prehung exterior steel frame door (pic available upon request).
This door leads to a concrete porch and water tends to flow towards the door. The door leaks around the bottom, and water drains into the basement area below the door. This has caused 3 joists to completely rot through (already replaced) and when I replace the door I want to prevent this from happening again - at least as much as possible.
I have pictures of the basement area as well but I doubt those are useful. I was thinking of replacing the wood and simply generously applying a LOT of sealant caulk (maybe something like used for sealing between concrete and patios rather than just plain silicon)... but I'm not sure.