Then, I built the roof apart and I positionned it on the 2nd floor. My idea was to cut the walls with the roof and to keep only parts needed. But, what a mess finally !!! Many walls are wide open now and it's difficult to retrieve closed geometrical forms :pb_avec_toit.JPG
Anyway, presentation is nice ... and my first objectif is a volume study for an extension to be coming :vue_globale.JPG
Many thanks for all the help I found on this forum.
Aegedus