I've got a structure I'm putting up that will, in the end, have as many as 10 separate doors ... all to the outside (several decks). I'm wondering if there is some formula or consideration for how to account for eventual flooring. I haven't yet decided on exactly which materials I'll be using on the various floors. And four of the doors enter in to the bottom floor which is slab on grade cement. The varying possibilities for flooring materials on that floor are even greater. How would any of you who've worked with doors approach putting up doors before knowing what the flooring will be?