The builder wants to know the unit size for the window manufacturer, and the wallhole size for the carpenter to make the opening which includes allowance for movement, etc, in this case is 13mm eitherside of the unit and 28mm above.
I need to therefore list both the unit size and the wallhole in my schedule.
The oversize opening I have always set as 0, instead using the wall hole to create the opening.
Even if I change to using the oversize setting, in 3D i get a gap on both sides and above.
If I use the wallhole setting, I only get the gap above. My question is why? and how can I make the gap not appear?
Opening oversize does not appear to be the solution, unless you can cover the gap in 3D
ArchiCAD 18/Windows 7/16GB Memory/i5 3.2GHz Processor/NVIDIA GeForce GT 610