Douglas Harper's Etymology Dictionary
Usage examples of "roof-top".
One seized Bradley and carried him through the yellow doorway to the roof from whence it rose upon its wide-spread wings and flapped off across the roof-tops of Oo-oh with its heavy burden clutched in its long talons.
Sunlight lay, a warm benediction, on pavement and roof-top, reflected from the silvery curves of high-floating barrage balloons.
This led to his tromping over numerous roof-tops, setting off great commotions and panics among many garret-dwellers who lived in fear of raids.
While Thomas and Lloyd were talking above the waters of the Thames, and the Jackal was scooping the last drops of his Zabaglione from the glass in a roof-top restaurant in Milan, Commissaire Claude Lebel attended the first of the progress report meetings in the conference room of the Interior Ministry in Paris.
From where I was standing alone on this roof-top, silhouetted dramatically against the full moon, I could see the greater part of A City in Terror* Flames were rising like Old Glory at a witchfinder's weenie roast.