Our solar house was earth-insulated on the back side, too.
What did you specify for uphill drainage?
We're planning to make use of ICF's when we build a home ourselves, and any house we build in the future will be built by ourselves. The home we're in now was newly built, and there have been ongoing surprises because of shortcuts the builder took in its construction; things that were hidded from view when we bought it. Never again!