Can the aluminum veneer ceiling keel be made of gypsum board?

The keel of the gypsum board ceiling is best made of light steel keel, which has high flatness and will not be deformed. If the area is small, then use fir squares. This is sold in general building materials stores, so just ask about it.

The ceiling includes material costs and labor costs, if it is contracted labor and materials, then the two costs are calculated together; If you package light industry, then only the labor cost is calculated.

The building materials market has supporting products to choose from.

To be arranged vertically, the spacing should be as small as possible - determined by the size of the radian.

Yes, but it is recommended to use PVC ceilings, as drywall is afraid of water.