Can the woodworking board for the ceiling be directly painted?

How to prevent gypsum board cracking 1Ensure that the ceiling skeleton is always in a reasonable state of stress: the basic principle is that the ceiling skeleton should be arched in both directions according to the length of the short side of the building rectangle.

But this is only a basic principle, and the situation of each project is different, such as the thickness of the boom is different, the material is different, the spacing of the boom is different, and the thickness and number of layers of gypsum board are different. These will affect the value of the change in the deflection of the skeleton after being stressed. Therefore, under the premise of ensuring 1 200, according to various factors affecting the deflection, the amount of arching should be increased appropriately.

In short, the skeleton should always be in a slightly arched state, that is, the skeleton has a final deflection under the load, and the skeleton is still in the arching state. 2.Use wedge-edged drywall:

Nowadays, many manufacturers produce wedge-shaped gypsum board. The characteristic of this gypsum board after caulking is that although the embedded material in the joint is less than the material in the joint of the flat plate, its caulking material is connected with the batch of embedded putty on the wedge-shaped edge, which makes it contact with gypsum board and increases, and there is also a tough seam tape as a reinforcing rib of putty and putty work together, which improves the crack resistance of the board joint to a greater extent. 3.

Use the manufacturer's matching caulking putty and seam tape: Now there are gypsum board manufacturers with matching caulking putty and seam tape, which are gypsum powder containing polymer adhesives. It not only improves the adhesion between putty and gypsum board edges, but also has a certain toughness and slight extensibility, coupled with the relative toughness and elasticity of the seam tape as a reinforcing rib, the tensile strength will be greatly improved, and its own shrinkage force will be greatly reduced, which is of great significance to prevent cracking.

It's definitely not going to work, it's going to crack after a long time.