If you can find a dealer who sells Lexan plastic windows they can take a sledgehammer and not break, it just bounces off. The trick is to have window frames that are strong enough to withstand the impact so you don't have the whole window go in even though it didn't break. it is not cheap though.
I have had several discussions with the people at GE Advanced Materials Polymershapes and even a quote.
I asked them for:
1 ? Door (3?x6?8?) with mostly ?? MR10 Lexan clear window and 6? intrusion resistant metal framing. Continuous hinge.
3 ?. 44/400 Fixed Frames (38" X 76?) (Clear or Dark Bronze Anodized Finish) - glazed w/1/2" Clear MR10 Lexan?.
2 - 44/350 Style Casement Windows 36"W x 26"H (Hinged @ head) w/hold-open hardware. (Clear or Dark Bronze Anodized Finish) - glazed w/1/2" Clear MR10 Lexan?.
They were $2,200.00, $3,200.00 and $3,800.00 respectively.
Very nice stuff.
They say their GEPS-Insulgard international division in FL does all the paper work including the ?Consular invoices? for shipping. I voiced my concerns about the ?non-standard? import duties and they said ?No problem.?
Actually the lady they had me speak with was Dominican.