should toughened glass 'flex' in a new build

[clonboy]

hi all
i got new windows installed in a self build, anyhow there are two bay windows to the front, now these are supposed to be the low e glass windows, and anyhow my issue is that i noticed recently that the main large pane(centre one) in one of the bay windows is flexing, as in if you just press it with a finger it bounces in and out, the other window in the room opposite is quite solid.

i mentioned to the window firm and they said its nomal for toughened glass to be flexing like that, is this a line? what does other say/ think.

not so much a problem for me,, but what happens if you did have to repalce a glass panel, and how is the gas filled in between them again?

 

[eamonn123456]

Dunno about toughened glass but in general if DG breaks you would change the whole glazing unit which would be prefilled with gas if that's what you specify.

 

[10to1]

I have toughened glass and on very large panes the glass will flex. This is normal. Naturally a smaller pane won't flex as much given that the thickness of the 2 pieces that make up the DG unit are the same whether a large or small pane. I had some roof lights put in and you could literally see the glass bouncing up and down when it was being lowered in using suction cups.