ᐅ Door Installation (Garage): Before or After Plastering?

I just spoke with the construction manager, who asked if we could install the garage door—or at least the frame—on the back side this weekend. Huh? That hasn’t even been ordered yet. I always assumed that would be done at the end, since it’s not very urgent right now.

Is it impossible to plaster if the frame isn’t installed yet?
First, I won’t be able to manage it over the weekend, and second, I don’t want the frame to get smeared or damaged.
Or would the plasterer have more work if that’s the case?

What type of door is it supposed to be?

Plastic door 101cm (40 inches) by 201cm (79 inches) on the rear side of the garage. Basically a secondary entrance door.

The side entrance doors will definitely be installed in the door opening. It would be better to do this before plastering. If the plasterer has to start again for touch-up work, it will cost extra.

But don’t I just set the door into the door opening and screw the frame on the inside on each side? Where exactly does the plasterer still need to work then? I’m not quite following.

Oh, I see. You probably mean the area that needs to be filled with expanding foam or something similar. Hmm... let’s see what the site manager says when I tell him the door won’t be delivered for a few weeks.