Hi Jiminico, I'm not known for my photography skills! I took these this morning as I was running out the door. Excuse the visual clutter! The screens are stacked back (not all the way)- so you can get an idea of the size of the opening when all is stacked back. To have bifolds here would of meant 4 panels (lots of frame and less glass), then the encroachment of the panels into the room when they are folded back.

I don't have stacker doors, I am too far south and want an airtight seal. We are doing Binq slider which are 2400 high and around 4 mtr long - only opening one side. I can have it open to the middle or the kitchen though. And we will have a large window where the living room is as I want a cosy winter nook. But of course our living window can open for breeze too and will be about 2mtr wide at least. From what you guys are saying opening to the middle of the extension is preferable! I guess as I am the cook standing about I was thinking of myself with a pleasant breeze blowing around me as I stir my pot. ;-)

Dr Retro's analogy with a convertible are so true. We elected to wait 12months in our recent house purchase before embarking on major renovations. The magnificent view that we thought we needed to have stacker/bifold doors for turned out to be too breezy to have the doors open for more than a few days a year. So the extra wide mullions associated with this kind of door would be impacting the view for 99% of the time. In the end we went for extra wide sliding doors (3 for a 4.6m width) with the narrowest mullions we could find. As for your quandary re the corner post, how about a very small section solid stainless steel post? Along the lines of Miles van der Roh's Barcelona Pavilion?

We have the same layout as you in our 90s spec built home. We have Bunnings type cavity sliders so I imagine ours are about as cheap as you can get. They are awful - they are noisy when they slide so if one of us gets up in the night for the bathroom, we have to open the door in slow motion so as not to wake the other one up! We have them on our other wet rooms through the house and I find them not too bad acoustically but they don't screen anything in the ensuite. I would not recommend them at all. As for whether to have 1 or 2 doors, the only time I close the WIR door is when I am at my wits end haha! It's a great space for a private phone conversation but I really couldn't be bothered closing the door any other time