Revisions log for Answer #684

As a rule, exterior blinds do NOT raise automatically. External blinds can be controlled by a motor, as you are used to doing with roller shutters. BUT: A big disadvantage of exterior blinds is their weight, so they are extremely susceptible to wind. Regular roller shutters have their own weight and therefore are not as vulnerable. The individual slats of exterior blinds can rattle, and more importantly: It can happen that the slats come out of the guide rail, get tangled, bent, etc. This can happen with rail-operated roller shutters as well. It can also happen to exterior louver guides, and we've run into this before. There are so-called sun/wind sensors to prevent this. Although these sensors are optional, they are almost mandatory for exterior louvers that are supposed to last a long time. These sensors measure solar radiation, wind direction and wind speed (called astro functions) and then control the exterior louvers accordingly.