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Old 09-13-2014, 06:23 AM   #15
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I do not know about on coach windows but I get polycarbonate glasses. I pay extra money for the scratch resistant coating. Every year I replace them because of scratches.

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Old 09-13-2014, 07:54 AM   #16
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As everyone says, polycarbonate is very prone to scratching. Even scratch resistant PC will scratch, and it is very expensive. It would probably be about the same cost to have the fogged windows repaired as to replace the glass with PC, and the PC would not provide much insulation value. The cost to repair a dual pane window (except large passenger side windows) is $225 each at Suncoast Designers in Hudson FL.

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Old 09-13-2014, 10:53 AM   #17
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The cleaners to avoid are ones with a high pH such as ammonia. Dish soap is fine, Windex without ammonia is fine.
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Old 09-18-2014, 09:15 AM   #18
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Thanks for the input everyone. I’m going to do some more research on the product and go from there. I only washed the “side windows” once this year and they still look great. So I am not too concerned about scratches from window washing.
Also I asked our RV Dealer and they do not repair fogged/creeping seals, they will replace the entire window unit $$$$.
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Old 09-18-2014, 10:32 AM   #19
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I've used "Lexan" for all the windows in my drag car for years. If you go this route the mar resistant style is an absolute MUST have on both sides. Without the coating this stuff will cloud over and look like *&%$ within a few months. Every time you even think about touching it there will be a scratch.

Absolutely NO chemicals can touch the non coated polycarbonate.

You will probably end up with cracks starting at the edges also.

I'm on the third set of Lexan windows in my race car over a span of 20 years and they're due for replacement again.
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Old 09-18-2014, 02:33 PM   #20
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So, you want to replace a two piece glass window that has fogged inside that has a bit of insulation quality and does not condensate with a single piece lexan that will scratch at the slightest touch and within a year be as clouded as the glass window you replaced and will likely leave the walls below them wet? Sounds like a plan!
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Old 09-23-2014, 04:17 PM   #21
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Lexan (polycarb) is very soft and scratches easy. Plexiglass is harder and doesn't scratch as easy as polycarb. Then there is PVC-A which is much clearer than the other two but is more brittle, not as bad as glass but not as strong as polycarb (bullet proof glass). All are a lot more expensive than glass.

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