In tooling, do you usually hang a layer of gypsum board on the ceiling, a layer of multi-layer board plus a layer of gypsum board, or two layers of gypsum board? Where are they used?

Double gypsum board ceiling or partition wall is mainly the construction quality requirement, which mainly plays a strengthening role and makes the surface smooth. In the case of a layer of joinery board and gypsum board, it is generally used on the ceiling, mainly for reinforcement or complex modeling. In complex modeling, first make a layer of joinery board (multilayer board) foundation, and then coat a layer of gypsum board.

As shown in the figure, adding a layer of joinery board on the side is mainly to facilitate the installation of the grille network of the air conditioning outlet. Gypsum board is easy to crack if a layer of joinery board is not made.

Double gypsum should be installed in staggered joints.