You can't open two doors in the same direction, which is a taboo in geomantic omen. If the door is unlucky or inconvenient, you need to open another door, which is allowed in geomantic omen. But the doors must be of different sizes, that is to say, one is a door and the other is a toilet door, which can't be opened that big. In principle, it should not exceed two thirds of the width of the original door, and the height should be slightly lower.
If you make a shutter door as a garage door, this is allowed because you can't call it a gate. The door of the house is called the gate, which is convenient for people to enter and exit. The door of the house is the door of a family, facing an auspicious and peaceful atmosphere. The garage door is not the door of the house. Its construction rules cannot be the same as the gate of the joint house.