Casper Larsen

Hi so i have some trouble with rooms i am pretty new to this still but me and a friend have built this mill and nearly all the "rooms" made for it will not count as such we don´t know what we have done wrong since some blocks arent red when we use the /debug room hi command. We suspect that it is beacuse we used slabs for construction as our celler is acually green/confirmed to be a room and well we just used regular blocks for that. we have some picture of the house if anyone can spot why this might be If anybodies knows why this is happening we would really apricate it thank you in advance.