The roof of a family home was a center of activity. A father might gather his household there to talk about Jehovah. During the Festival of Ingathering, for example, booths were erected on the rooftops. (Le 23:41, 42; De 16:13-15) Such chores as the drying of flax were done there. (Jos 2:6) Sometimes people slept on the roof. (1Sa 9:25, 26) Any activity on a roof would easily be seen by others. (2Sa 16:22) And an announcement made from a rooftop would quickly be heard by neighbors and those passing by on the street.