Shutters in Europe
Traditionally, in Europe shutters were installed for security, noise reduction, insulation, and to protect the windows to extend their lifespan. These houses are called Swiss chalets and are found in the mountainess parts of Switzerland. The main reason why shutters survived throughout history was because they improved the aesthetics of the house. Not only do the Swiss love their shutters but they also enjoy decorating the windows with flowers.
Traditional Shutters in Japan
Old Japan found similar reasons to install shutters. The main purpose for these sliding door shutters was to protect the house from intruders because the doors were very thin. But like in Europe, they also helped protect the exterior doors, kept the house warmer in winter, and reduced noise coming from the outside.
Why Thermal Shutters?
Ability to make a room completely dark and sound proof
How Are Shutters Attached?
Because the shutters are large and heavy, they needed to be bolted to the structure before the insulation foam boards go up. Here is what the finished hinges look like. Here is how the seal was installed. The house shown here may be the very first house with workable shutters that not only close, but are also air tight and help insulate.
Here you can see how the shutters seal to the windowsill on the top and bottom of the window. And you can also see how it locks from the inside of the house.
The inspiration for matching the back side of the shutters to the walls was to mimic the function of the human eye. As the shutters are closed in the evening, it leaves the impression that the house has gone to sleep for the night, just as our eyes close when we sleep.