We recently spoke to a window installer from Home Depot regarding their basic, vinyl, double-hung windows. Their windows seem really good, they have an excellent warranty/guarantee, but I felt are fairly pricey ($500 per window--we live in PA). They have 2 types of windows they are offering and I have some general questions that maybe someone here can help me with. 1. The upgrade has thicker glass (so it's less likely to break) and the panes are set farther apart so they can get more argon gas in them which was something he seemed very proud of. He said the thicker glass and wideer spacing/more argon helps with the insulation. But won't that argon just disipate over time? Is it really that great an insulator? 2. He also mentioned some kind of coating (a polymer I think) is on them to help the rain run off it rather than bead on it making it stay cleaner longer. Does that really work? 3. The corners are mitered instead of boxed. Does that matter in the long run? Besides the high cost per window they have a minimum requirement of 3 windows installed or they charge you a $200 surcharge. We really only need one window installed right now, but there is no way I'm paying $700 for one double hung window to be installed. Is it unusual to have a minimum requirement or is that standard? Thanks for your help!

Does anyone know where I can purchase small operable vertical sliding utility windows with Safety (Tempered) glass or acrylic. The shed has essentially become a playhouse for the kids. It currently has 12" (W) x 20" (H) what appears to be glass storm windows. My concern is it shattering. I see tempered glass windows all the time on sheds but for some reason, I am having trouble finding them for sale without the shed. They need to be operable for ventilation. Thanks for the help.