Thank you, but that doesn’t help us with our questions. Is the concept sensible? Again: ancient small rubble stone house, ground floor + 1st floor; without a concrete slab, without a basement, future use as a holiday home. Meanwhile, we have reached the following consensus: deliberately keep it simple no insulation on the thick rubble stone walls insulation on the top floor ceiling (attic remains cold) baseboard heating and hot water with gas operation, possibly a small solar panel on the south wall repair roof and chimney wood stove in the kitchen-living room no concrete slab, no sealing, no plastic foil, only expanded clay on the clay floor, then wooden floorboards no large furniture What do you think of that? What else would you do?