Burying a basement layer above existing grade is interesting. I hadn’t considered the possibility of backfill to create more thermal mass but it makes sense to

Burying a basement layer above existing grade is interesting. I hadn’t considered the possibility of backfill to create more thermal mass but it makes sense to me. It would require importing a fair amount of material though. I would need to understand where that material comes from and the overall impact it would have to do it at scale.