I’m looking at a new house design in the SF Bay Area, and am not quite sure how to insulate basement walls. The lot is sloped, so the basement on the left has soil outside the concrete, however the dashed line in the lower right shows the garage door which sees daylight.
The idea is insulate the inside of the exterior concrete walls, similar to what is shown in Slab Happy:
However, it would be ideal if the concrete in the center of the image could support some load bearing walls. Additionally, I’d like to have the white area on the left be 6-7″ above the garage floor on the right. This would be so that any fluids in the garage, say from a washer or water heater overflowing, don’t flow into a living area.
Finally, my question, how would I take care of insulating these interior foundation walls to block off that thermal break? Poking foam up would seem to create havoc interior wall finishes.
PS: I see the article on exterior foam thickness, is there anything similarly for under slab minimums?