Double Wall Windows and Doors

[Mike53]

Not sure i fully understand what it is you are trying to achieve, in order to give further advise i think you need to show images or maybe share your file, either way would help us understand what the difficulties are, especially since positioning windows, even into a double skinned wall, should be easy.

[KitchM]

http://www.mediafire.com/file/y37d08nrn04xr5x/Corner_Window.sh3d/file

[Mike53]

quick question
are your walls really 640 mm thick

[KitchM]

I have an eight inch concrete block wall, a fourteen inch space and a second wall of two by three or fours.

[Mike53]

ok.
try this
its not fancy but it fills the hole

[Mike53]

the group of box's and the opaque wall i used to create are all still there, if you wish to modify any of them to create your own, you will now at least be able to see how it is done, once happy with it, export it then import it but check the box that says "door or window" when you are importing it.

[KitchM]

Thanks. I'll give it a try.