Hi All,   Reposting this as I originally put it under 'General Construction Issues' and haven't received any comments.      I'm just looking for a sanity check on my foundation detail (to hopefully provide some peace of mind before I keep building up).   I'm constructing a highly insulated new build (200mm PIR above DPC, full fill XPS below DPC).  My foundation detail is based on a Greenbuilding Store case study: https://greenbuildingstore.co.uk/golcar-passivhaus-gr