Hemlock mudsill foundation
I'm new to the forum and new to construction. I have hired this real oldtimer carpenter (semi-retired) to assist me in building an 8x12 mudroom attached to my kitchen door on the rear of my house. We are actually building the mudroom right inside the rotten walls of the old mudroom, which was bigger.
After cutting out the old floor and ceiling, we realized the ground level inside this old structure is about a foot below the level of the ground outside, and my old-timer helper decided we'll put a 8x8 12 ft hemlock mudsill right on the ground, shim it up with bricks and rocks underneath, and hang floor joists. We don't have any holes with concrete piles or pressure treated posts or anything. My helper insists that as long as we provide fill and drainage around the outside of the mudsill, we will not get any frost heaving.
I am having some concerns about this "old school" style of building, but this guy seems pretty sure.