The word(s) "roof" appears 65 time(s) in 63 verse(s) in Quran in Muhammad Pickthal translation.

(31) Those before them plotted, so Allah struck at the foundations of their building, and then the roof fell down upon them from above them, and the doom came on them whence they knew not;

(32) With clear proofs and writings; and We have revealed unto thee the Remembrance that thou mayst explain to mankind that which hath been revealed for them, and that haply they may reflect.

(33) And verily We gave unto Moses nine tokens, clear proofs (of Allah's Sovereignty). Do but ask the Children of Israel how he came unto them, then Pharaoh said unto him: Lo! I deem thee one bewitched, O Moses.

(34) He said: In truth thou knowest that none sent down these (portents) save the Lord of the heavens and the earth as proofs, and lo! (for my part) I deem thee lost, O Pharaoh.

(35) They said: We choose thee not above the clear proofs that have come unto us, and above Him Who created us. So decree what thou wilt decree. Thou wilt end for us only this life of the world.

(36) And they say: If only he would bring us a miracle from his Lord! Hath there not come unto them the proof of what is in the former scriptures?

(37) Or have they chosen other gods beside Him? say: Bring your proof (of their godhead). This is the Reminder of those with me and those before me, but most of them know not the Truth and so they are averse.

(38) And we have made the sky a roof withheld (from them). Yet they turn away from its portents.

(39) Whoso is wont to think (through envy) that Allah will not give him (Muhammad) victory in the world and the Hereafter (and is enraged at the thought of his victory), let him stretch a rope up to the roof (of his dwelling), and let him hang himself. Then let him see whether his strategy dispelleth that whereat he rageth!.

(40) He who crieth unto any other god along with Allah hath no proof thereof. His reckoning is only with his Lord. Lo! disbelievers will not be successful.