A terrace is used, in practice, for about ninety minutes a day, and almost never at the hour it appears in the brochure. The design consequences are specific.
Shade before furniture
A terrace without deep shade is a photograph, not a room. On the Mediterranean projects we now build the soffit before the client has chosen a single chair.
The wind matters more than the view
Cliffside terraces are frequently unusable because of a thermal wind that arrives at the exact hour you would want to eat outside. A 1.1-metre solid parapet fixes it and costs nothing; a glass one looks better in the photograph and fixes nothing at all.