When you build a new house, then you shall make a parapet for your roof, that you bring not the guilt of blood upon your house, if any man fall from there.
All Commentaries on Deuteronomy 22:8 Go To Deuteronomy 22
George Leo Haydock
AD 1849
Battlement. This precaution was necessary, because all their houses had flat tops; and it was usual to walk and to converse together upon them. (Challoner)
King Ochozias had the misfortune to fall from the top of his house, (4 Kings i. 2,) and David saw Bethsabee when he was walking on the roof of his palace, 2 Kings xi. 2. Saul slept at the top of Samuel's house, 1 Kings ix. 25. See Josue ii. 6., and Matthew x. 27. (Haydock)