I am building a frame for a cottage on a pier foundation. And I'm thinking about how to handle the area beneath the exterior door. How do you handle the sill under the exterior door if you want to minimize the threshold height? Should you cut away that part after the raising, and if so, do you lay the floor particle board all the way out to the frame opening? Meaning, the particle board would end up under the threshold against the joists. It is quite an exposed position as I assume the particle board isn't particularly moisture-resistant in the long run...