Digging Myself A Hole...for a Passive House!
Have a look at the pictures below. The first picture is looking approximately west, as is the second. With a minimal structural pad in place we will be above natural grade in the far north west corner of the lot (i.e. picture 2, the stake to the far right in the corner of the dug out.). If you look at picture 3 below, you will see theres a bit of a pit. We knew we would require fill there....and we need a lot! That small round silver object over the stake, pushed into the dirt pile, is a spray can. it represents where the bottom of the footing will be in the north west corner of the lot. So it seems that using a 4' frost wall everywhere will not be an option anymore otherwise back filling to the top of the wall at the back of the lot will turn the lot into a ski hill. Our plan is a stepped frost wall of varying depth from 8' to 6' to 4' from the low to high parts of the lot with backfilling 4' up the wall and follow the natural grade of the lot. We may do siding part way down the insulated concrete or just leave it with the concrete parging over the foam. Behind the garage will be nice and sunny and I have been thinking about using that area for my solar kiln for drying green wood for woodworking and firewood. So leaving the foundation exposed there may not be a big deal.