The curved edge of gypsum board is not gypsum board, and gypsum board cannot be bent, but is made of wood board.

The whole arc of the ceiling is directly cut by gypsum board.

Small wooden squares are embedded in the keel of gypsum ceiling.

On the edge of the ceiling, thin boards such as Jiuli board and joinery board are nailed to the wood square.

Forming the initial shape of the arc-shaped edge

Then paste kraft paper or cloth at the joint between the board and gypsum board and fill it with putty to prevent the joint of the two materials from cracking and affect the use and beauty of the ceiling.

The outer layer should be carefully made into a perfect arc with putty.

Then the whole body is polished to make the surface smooth and flat.

Finally, according to the latex paint process, brush primer and topcoat.