People living in the areas that have harsh weather conditions try to protect the outer open sitting areas like patios and pergolas. These areas can be covered by using external blinds to protect these places from certain weather elements. There would be some people who will love to enjoy nice weather without covering the roofs of patios or pergolas but in some conditions like rain and harsh sunshine, they can also extend the and cover the roof by using external blinds. There is a roofing option that can meet such a need and retractable roofs are the one that can...