4 - 24hrs

Further Reading
Keeping Cool with Shutters and Warm with Walls
One thing everybody needs and wants when they are relaxing at home is to feel cozy when it is cold outside and nice and cool when the sun is beating down. Maintaining the temperature in a house can easily be achieved with some fairly simple adjustments and add-ons. When it comes to colder climes you want protection against the glaring winter sun in the home or office. To ensure you are shaded but warm though you need to make sure that your property is properly insulated. There is little point turning up the heat only to have it escape. The home is like the human body, it needs to be wrapped up in the cold to maintain a good temperature and shaded on bright sunshine days. Wooden shutters are ideal at diffusing sunlight and of course they also completely transform the look of a house. They act as a design feature that has been around for a couple of hundred years.
They can be fitted to the interior or exterior of the window and can be solid or louvered. Of course they also provide a sometimes much-needed privacy from the outside world without giving a heavy feeling that curtains sometimes can. A lot of time is spent in the home and to not have adequate insulation is like walking outside without a jacket. You are going to struggle to keep warm and any efforts to do so could cost you more than an insulated jacket would in the first place.