That s with floor to door top height of 7 feet.
Gap above shower door.
Between the thinset or mastic whichever you.
Bypass or sliding door dimensions alcove shower bathtubs commonly are 60 inches wide and their bypass or sliding doors are usually about 58 inches.
Tear off the tile of the existing wall in question.
Question is will it be a problem only having a 6cm air gap above the door and side panel.
It must be exactly 60 inches.
The edge seal along that edge is probably there to hide the condition you are describing.
Bypass or sliding shower doors are a common solution for a small bathroom or bathtub showers.
Different types of weatherstripping are made from rubber felt and foam.
The distance between the tray and the ceiling is 1 96m.
A small gap above the door can be filled by weatherstripping which is flexible and will conform to the gap filling the space up and preventing air from entering and exiting.
When framing the alcove do not add any extra space to accommodate the shower tub.
Ideal for wide openings with a typical opening of 60 inches wide.
I think it is reasonable to reject the 1 4 difference in size of the gap between the door and fixed panel.
Some are nailed on some have adhesive backings and some slide into a notch in the door jamb.
Sliding door operation requires no floor space for opening door.
The one i like twyford t4 or geo6 is 1 9m.
This dimension might be direct to stud or between two wall coverings.
The industry standard is 1 16 but i think even that is pushing it.
Shower enclosure seem to come in 1 85m 1 9m and 1 95m.
Then build it out with 1 2 hardee board or durock and then cover it with tile.
Consist of two and sometimes three panels that slide along each other on tracks.
The door guy said 24 inches is a good number depending of course on your ceiling height.