On a terrace, that low wall or railing is sometimes the only barrier between you and a big drop. If it’s too low, too thin, or easy to climb, it creates risk—especially for kids who love running and curious teenagers who like sitting on ledges.
Standing there and honestly checking: “If a child ran here, would I panic?” is important. Even for adults, a slightly higher and solid parapet feels psychologically safer, so you can enjoy the space without constant worry.
If you plan to use the terrace often—for walking, yoga, small gatherings—you want to feel protected, not on edge.