Briefly, extracted soils were mixed with water and the obtained mud was shaped manually; Resulting air-dried (48 h) bricks were placed in efficient stackings in order to ensure a continuous air flow through a setting up as-similated to a basic oven (that was built simply on ground), heat treated with dry wood for a period of about three days at temperatures ranging from 500°C to 800°C and finally cooled progressively up to ambient tempera-ture during two/three days.