With one folding door, it has been upgraded to a more luxurious house. Before the folding door construction, I was worried about the empty interior of the house, but after the folding door was installed, I was able to protect my privacy in a private way.

Some customers worry about insulation and sound insulation, saying the folding door looks thin.​
It may look thin, but the aluminum (AL-6N01) high alloy material used in airplanes and ships makes it harder, stronger, and less wear-out.

It also applied an insulation called polyamide, which shuts off the temperature outside the door, which can enter small gaps, further increasing the insulation effect.