Generally, one side of the door is fixed by the veranda and the living room's middle door, and it is a project window that opens and closes by pushing or pulling an unsecured 쪾. In this case, many people prefer to install folding doors that have a good opening and closing rate due to poor utilization, such as moving large items or decorating the veranda space as they are limited to the entrance space with fixed glass.

Folding doors are the only ones that can have both the advantages of veranda expansion and non-extension.

You are already living in the house, not in the case of the entire interior construction. This is when the project window is removed and the folding door is replaced. As furniture, electronic devices, etc. are already located, demolition costs are added to carry out construction in the same way as the entire interior construction, and the interior can be damaged. Therefore, the construction method of the lower rail without demolition is carried out by removing only the project window instead of removing the existing shot seat.

Some people are worried that the lower rail jaw will be raised, but the height will remain the same by combining it with the existing lower shot. As the lower rail construction method does not remove the existing shot sheet, there is no additional cost of removal, and there is no damage to the wallpaper, floorboards, marble, etc., which have already been constructed.
The construction method does not require demolition work, and the folding door installation time is fast and this construction method is also called the "one-day construction method".