I am looking to replace a few of my windows at home, and I asked for quotes for non-impact windows and impact windows. I also asked the window companies if they have windows that can see out but not in, they all said to me "no not for residential it's only for commercial" and when I asked them to give me a ball park figure they wouldn't even do that and just said "trust me, it's VERY expensive".
What is so special about those windows? Is it a special glass? or is it something you can "apply" onto ordinary glass afterwards? Are we talking about 10 times more expensive? I have a large picture window inside the shower facing an interior courtyard, right now I am planning on using hurricane impact obscured glass window, I thought I ought to consider this other option but I can't even get a price!