biahoi
2016-07-21 12:45:59
- #1
Hello everyone, we are now faced with the decision between a KfW55 and KfW40 standard. Could an expert roughly estimate how much more expensive in % or € the additional insulation measures for the slab foundation execution for a KfW40 would be compared to KfW50? Maybe this can also be neglected. We have no idea about the effort and, of course, no one can tell us in advance what a slab foundation for our project would even cost. The house will have a footprint of about 10 x 10 meters and will be built slightly elevated due to the flood protection area. I am grateful for any helpful opinion.