The initial work is that the door box is replaced. The old box can be broken completely, since it still cannot serve for the product that is currently installed. Then they proceed to fix the new box, which can be mounted using special metal anchors.
If the door is completely collapsible, then you will have to install the loops on your own. It is important to determine those areas in which these elements should be fixed. Make marks for loop at the same time on the box and doors. First of all, the hinges are attached to the box so that their pins look up. Then you can hang the door leaf itself.
When these works are completed, you will need to carry out certain actions that serve to increase the decorativeness of the door. In particular, platbands on both sides are attached. Sometimes it is difficult to fix them, then it will be necessary to use the additional elements.