Kraken's 166 Rectangle

[sphelps]

Originally Posted by Kraken

The glass is 0.945" thick, no bracing needed

I think you need a better measuring device

FYI your mold issue would be related to vapor barrier and insulation, internal warm air containing something cold forming condensate creating a moisture problem and mold. The issue would be fixed by sealing it properly which hopefully you did but just thought I'd mention it as just installing new drywall will only result in the same issue later.