Earthen floor base over rockwool comfort board

Hi.  We are trying something new.  Thought I would share, we have poured 5” of earthen floor base (using lots of hemp fibre and sand in clay mix). This was poured over vapour barrier then rockwool comfort board insulation, which can handle compression but is flexible, under the rockwool is gravol bedrock. The home was built on bedrock pinned to it to en we filled low areas with gravol to make it more level, then placed comfort board then vapour barrier.  The main concern is the flexibility of the rockwool comfort board. We would have loved to use glavol but no suppliers here in northern Ontario and rigid foam did not seem like a good option in a home we are trying to make sustainable.  So we opted for a thick pour hoping the thickness will be enough weight to compress the rockwool evenly and prevent cracking. I can post an update in a few weeks.

I am keen to see how it performs, did you install temperature probes for research of your own?
PS What is Gravol bedrock?

"Gravol" bedrock  is bedrock that needs to be "loosened up" a little bit! But seriously--this is a gutsy and intriguing floor--way to go Kristin!