Cross reference
Mark 2:4
4 When they could not come near to him for the crowd, they removed the roof where he was. When they had broken it up, they let down the mat that the paralytic was lying on.
Luke 5:19
19 Not finding a way to bring him in because of the multitude, they went up to the housetop, and let him down through the tiles with his cot into the midst before Jesus.
Deuteronomy 22:8
8 When you build a new house, then you shall make a battlement for your roof, that you don't bring blood on your house, if any man fall from there.