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Storm Windows Made Of Plexiglass

I made my own storm windows using Optix plexiglass purchased at Home Depot. I'm told that even though Optix has a 10 year non-yellowing warranty, it will probably yellow before then. A better way to go would be Lexan, but it is at least 3 times more expensive. I went with the Optix because I figured I'd be learning how to do this as I went along and I didn't want to waste any expensive Lexan. For me, this turned out to be a good decision. Even though I didn't waste any Optix, I did scratch it several times and made a small crack in one window that I was fortunately able to repair. In any event, it cost me less than $200 to do the job with the Optix and I've kept the receipts and a copy of the warranty in case it does yellow. The warranty says I'll get a refund if it does and I'll be able to then use the windows as templates to make new Lexan windows. I'd say that making the storm windows was easy yet deceptively time consuming. I have a laser thermometer which is a great tool for lots of things. With it I've compared temps of the storm windows with windows that didn't yet have the storm windows installed. No matter what the outside temperature is, the difference is about 10 degrees (just little less than the difference between the uncovered windows and the walls). So they work very well. Interestingly, I also had one window covered with a cheap/easy plastic film storm window purchased at Walmart. It raised the window temperature by less than 2 degrees. I have no Idea why that is the case. I wouldn't have expected it, but those temporary storm windows are almost useless (though they do reduce condensation fairly well). I've also tested the Optix storm windows on a couple of warmer days we had and they definitely reduce the temperature being transmitted into the coach. I can't remember how much, but it was significant. My intention is to leave these storm windows up all year long and to take them off only for cleaning maybe once a year. I think they look good. People usually don't notice them when they visit. When I point them out, people usually only have good things to say about them. I left a couple of the smaller widows uncovered for ventilation and may end up removing one or two others during the summer. MATERIALS NEEDED: (1) 1/8 inch thick Optix plexiglass (at Home Depot this thickness only comes in a large sheet), (2) a plexiglass cutting tool, (3) #6 stainless steel pan head sheet metal screws 1/2 inches long (buy in quantity at the link below), (4) closed cell foam weather stripping to fit the channel in the window where the new storm window will fit, and (5) high quality clear silicon caulk.

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Here's an excellent place to buy stainless steel screws in quantity
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