The entrance door cannot be changed into an arch, and the doorway on the indoor lightweight wall can be changed into an arch.

Construction method:

1, determine the highest point of the arch mouth;

2. If the highest point exceeds the top of the existing indoor doorway, the exceeding part will be crushed;

3. After the doorway is smashed, it is necessary to add a lintel to the upper part, and it is recommended to add a steel beam;

4. Then, use light steel keel to make the door opening into an arched hole;

5. Fix the gypsum board on the light keel;

6. Stick an anti-crack bandage at the joint of gypsum board plates for anti-crack treatment;

7. Then scrape gypsum putty on the gypsum board, grind it flat, brush the interface agent, and then paint it.