Use rooftop conditions as a timing gate
The official terrace page states access from 10 am to 8 pm and warns of temporary closures in bad weather. Treat this as a gating condition: if rooftop access is your priority, place it early in your sequence and keep a backup indoor plan for weather-related changes.
Pick bookings by trip style
Mapped products for this POI are not one single category. You can choose short in-store experiences, guided formats, or longer Paris combinations that include cruises and multiple stops. If this is one stop in a wider sightseeing day, a combo format can work. If Galeries Lafayette is the focus, in-store formats are usually cleaner.
Run a final pre-visit check
Before travel day, verify three points on official pages: the current weekly opening calendar, the exact time slot for your booked experience, and any specific conditions such as weather-related rooftop closure or cancellation windows. This simple check prevents most last-minute friction.