To find yourself on a roof in a dream, denotes unbounded success. To become frightened and think you are falling, signifies that, while you may advance, you will have no firm hold on your position.
To see a roof falling in, you will be threatened with a sudden calamity.
To repair, or build a roof, you will rapidly increase your fortune.
To sleep on one, proclaims your security against enemies and false companions. Your health will be robust.