Lofted Room/Decking-Foundation and Floor Framing
Some background: I’m designing and building a house myself, my first one.
I’ve finished the design but I’m trying to figure the best foundation/floor framing/footing options for a specific loft/porch/deck scenario. The home is 32’x48’ salt box style, East coast zone 5. Currently my foundation is a cinder block stem wall with interior concrete piers. 2×6 studs, standard advance framing approach…
On a short end of the home, I was envisioning having a portion of the floor of my lofted bedroom, serve as porch cover for the entry door. If you can imagine, along the 32’ side (starting at the tall salt box end) there will be 12’ of wall reaching straight up to the roofline, then the next 10’ will be underneath the bedroom loft (8’ deep) the remaining 10’ (also 8k’ deep) will be essentially exposed decking.
My hiccup is, I was planning on just creating the 32×48 foundation, framing out a floor then calling it a day, knowing I might have to frame the exposed deck separately for water issues, however I’m unsure of the post to support the corner of the loft (porch cover). I’m not sure if that should be supported on its own pier or not. Meaning would I have to tetris the shape of my stem wall, then pier up my support 8×8 post to catch the corner of the loft.
Should I be concerned with the single post sinking or settling at a different rate from the rest of the house?
Is there a concern tying the house to the structure of the deck so thoroughly?
Is there a way to support everything on the rectangular stem wall, and maybe frame the floor and deck in a way to protect against water damage?