The idea would be to be able to exploit the raw statistics in order to carry out regulatory audits, by designating walls as overlooking the outside or unheated premises (ditto for the low floor) we could have wasting surfaces. A concept of N, S, E, W orientation should also be added So we could extract: 1 bedroom wall: 190S, 29m2 Joinery: 3m2 Wall 2 bedroom: 84E 18m2 Joinery: NP Etcc. Thanks for the attention, Have a nice day.