Hello,
I’m a homeowner that’s been lurking on this website for a while now. I live in Phoenix and have a home with numerous energy efficiency and heat gain issues that I’m determined to address over time. One of the big ones is the oft complained about orientation of the home so the majority of the glazing is facing east/west. The previous homeowners did do a few things to address this, strategic tree placement so the time any given window (on the first floor at least) has a full blast of sun is limited. Additionally, all east, west, and south facing glazing has solar screens with the exception of glass doors, which have tinted windows. During this time I’ve also become obsessed with light so I’ve started to remove the solar screens from our main family room during the winter. These windows face west and have a deep patio over them. There is also a line of trees from the neighbors yard that starts providing some shade as the sun reaches its lowest and most direct angle onto these windows. However, during the summer there is some time, a relatively short percentage when considering the whole day, where the sun hits this wall of windows directly and can provide an obnoxious glare into the room, even with the solar screen. We were thinking instead of adding window coverings that have been missing from these the whole time, we should first instead invest in solar screens for the edge of the patio that will be dropped during the final part of the day when the sun drops below the coverage of the patio.

I figure there are two advantages 1) a patio drop shade would be lowered only during the hours when the sun hits this area directly. So they wouldn’t unnecessarily rob the home of natural light the rest of the day when the sun isn’t shining directly on the western face of the house. 2) It removes the obnoxious glare during that annoying hour or so when the sun shines right through the window as a window covering would, but of course keeps the heat outside, rather than inside.

但是，在收到有关这种露台掉落阴影的报价之后，我担心我最终会花很多钱在功能上的好处上，因为当我们在几个窗户上添加色调时，我最终会做到。1）我会意外地选择在连续的太阳屏幕上掉落阴影，因为整天“凉爽的甲板”和泳池反射的光线可能会带来显着的热量增益，现在将不会撞到窗户而没有阻抗？或2）由于这些窗户大部分时间都已经有露台盔甲，而树木在最后有所帮助，所以外部太阳能屏幕几乎没有好处，我应该得到窗外覆盖物来处理任何眩光问题，也要保留出于同样的原因，一天的太阳能屏幕是一天的剩余时间？

Picture attached.