Greetings Mr. GaŽl
Polymethyl methacrylate is very good plastic.
Clear polymethyl methacrylate is a common bullet-proof glass, but it can be scratched, and yes it moves with temperature changes.
Our beloved "Corian
," an opaque plastic, that is composed of polymethyl methacrylate
with aluminum trihydroxide (a type of pottery clay
), is 357 mag bullet-proof at .75” thickness. Corian is a wonderful plastic created by Dupont. Scratches in Corian can be sanded away to invisible because it is opaque. Polishing out scratches in clear plastic, not so easy.
Years from now you won't be happy with any kind of clear plastic windows.
The majority of plastic windows in the USA Airstreams are temporary until real glass can be installed. Real glass is preferred.
The term “Double Strength” is confusing as it is a stronger single pane. Not a double pane. Tempered is better than double strength. You want “tempered” as it is the best “single pane”.
Stop fooling around, and don't waste your time with the idea of plastic windows. Do as Ed suggests, TEMPERED GLASS. Tempered glass should be your first choice. Tempered glass is strong and safe. It is easy to install. It will be free from trouble and will remain clear and last longer than you will live.
Your large front facing window could be bullet resistant polymethyl methacrylate, in order to prevent it from shattering by rocks and road debris, and it would eliminate the need for a front “rock guard”. It will scratch. Use care when cleaning. Plastic is vulnerable to chemicals.
You be very happy with all the other windows being tempered glass. Yes, it is expensive, but worth the price and peace of mind.
I was joking around with a French woman and we decided to make a list of American words that are preceded by the word “French”.
Automobile body work called “Frenched” as in Tail-lights
There's more, but my list is not with me now.
Thanks for your interesting posts and mostly decipherable, colorful English. We're all here to help each other.
Happy Trails, Wm