Hi,
I'm only a DIY'er, so feel free to ignore!
The internal glazing, the sealed units, are not normally structurally integrated into the uPVC frames.
They are usually shimmed into the frames with expansion space all the way around.
With out the glass in, there may be some loss of rigidity to the frame, but that is all (although the shape of your conservatory will also help to maintain rigidity).
To ease your mind, you could remove the glazing beads around one of the sealed units (plenty of videos on YouTube about how to do this) and see how it has been shimmed. If there are no shims on top, you will probably be fine!
As Ramdom Grinch says, sealed units are not part of the structural integrity , you should have no issue removing them...if anything roof glass normally goes in before the ' window ' glass anyway.
You wouldn't want to be removing the glass on a windy say anyway lol ..glass.in frames and roof can easily be removed in one day
Once the glass is removed the conservatory structure will be rigid enough to withstand winds....it won't be once you start removing the roofing bars though
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