Thanks Cod and you certainly deserve a loud "Chok Dee" for yr update!!!
If all's well that's moving well, the window thickness then shouldn't be a worrisome concern altho I can relate to your personal desire in preferably seeing a much thicker window frame installed.
Perhaps its because the standard ones in Thailand, in light of the temps there, a single glass window is more than adequate but if sound pollution is yr argument, I'm sure you can find a specialist retailer to customize it later on.
Just where do you plan to locate the pool and what size are you considering?