The roof, after the manner of the times, was flat, and had windows through which they might see what was done in the lower parts of the house.
Related Commentaries of Judges 16:27
Judges 16:27
27 Now the house was full of men and women; and all the lords of the Philistines were there; and there were upon the roof about three thousand men and women, that beheld while Samson made sport.