Contrary to the majority of the region, buildings in sub-region F do not have balconies or exterior stairs. The vertical structure is made of schist masonry walls, with hydrated lime mortar applied in the corners and at the door spans. Finally, sub-region G is located in the transition between R3 and R4, marking also the transition from the North to the South of the country. Mortar is more often included in the masonry techniques, and chimneys are frequently observed.