2860 mm profiles, crate is made.
The niche is sheathed with prepared drywall sheets.
The cornice is mounted inside the niche on screws.
What type of fastening of the ceiling cornice depends on many technical points, such as the size of the room and the height of the ceiling, whether the stretch ceiling was installed or not. The choice of the cornice is affected by the weight of curtains and curtains, the design of the room as a whole.