Step foundation / Discussions

...foundations off the bedrock (which is 0-2 feet below the surface) to reduce the amount of building materials that will need to be transported by barge. However I have heard there are problems with insulating the floor when using pier foundations and that a slab would be better. Also the neighbour built a similar chalet...

Hi everyone !  I have a 30x30 basement that I want to finish (on a budget). We live in zone 5a and the house was build in 1950. Normally I would've covered the slab with dimple membrane, 2" XPS and osb/plywood achored with tapcons. The problem here is that there's a significant slope to a central drain (4" at the lowes...