Which type of skylight is most likely to be successful?

A skylight mounted on a curb is generally considered the most successful type due to its design, which allows for better water drainage and prevents potential leaks. By elevating the skylight above the roof plane, it effectively minimizes the risk of water pooling around the edges, which can occur with flat-mounted skylights. This design also provides a better angle for sunlight to enter the space below, enhancing the natural light while reducing glare.

In contrast, a flat-mounted skylight may not drain as effectively, increasing the likelihood of water accumulation and leaks. Skylights with decorative features can add aesthetic appeal but may not necessarily contribute to functional success or longevity if their design compromises the integrity of sealing and installation. A skylight with no structural support is definitely not viable, as it would pose safety hazards and structural concerns, much like a poorly installed and unsupported structure could lead to critical failures.