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If the door opening is flattened, the width of 90 is the best, if you can ensure that the door opening is very standard, you can do 91 height, if you don't stick to the floor tiles, the wall hole standard can do 248 or 249 Stick the floor tiles to do 235 (the door is on the floor tiles, if you bury the same as the front) (if the floor tiles are thick and the ground level difference is large, it will be 233 is about the same).
Depending on what material is used, it is generally about 700 yuan per square meter.
Not high. This is the standard size. The gates of the whole country are generally so high.
One is to increase the height of the door opening, and the other is to customize the size from the manufacturer.
This situation is normal, it is fixed with expansion screws during installation, dotted and mated, and then filled with styrofoam and sealed with sealant on the outside.
Now it's all two holes. 300 mm, 400 mm.