,
France , Germany, completely consists of houses with colored exterior shutters. Exterior shutters were originally constructed for light control, privacy, security and protection from the elements. Many areas of tropical Australia, the Mediterranean, Africa, and the American South, feature exterior shutters that block the strong sun from windows. Functional shutters hinge on each side of a window or at the top and swing closed when necessary and can also be mounted on tracks applied to the face of the building. Fixed and operable louvers shed rain, allow air transfer, filter direct sunlight, protect from small flying debris, and provide privacy. Operable louvered shutters allow for greater control of light and ventilation. Solid panels and board-and-batten shutters are generally used for security or protection during severe weather. Non-functional shutters are merely used to enhance the appearance of a building. Functional shutters have traditionally been constructed from solid woods that have proven to endure outside elements but have also been mass-produced in woods less suitable to the outdoors like pine. Finishing wood shutters is recommended for extended life. Composite shutters offer advantages over wood shutters such as resistance to twisting, splitting, and rotting. However,
PVC shutters are often hinged with three or more hinges and painted with
vinyl-safe paint to keep from bowing in the sun and can require additional hardware.
Fiberglass shutters are more dimensionally stable than PVC. Certain hardwoods currently used for exterior shutters, specifically
Spanish cedar, Honduran
mahogany and
teak, are resistant to rot and decay, and far more durable than a softer wood like untreated pine. Because of the
tannin in these woods they are also not prone to problems from insects. Pressure treatment with wood preservative makes pine, cedar and other types of wood suitable for exterior shutters. Non-functional exterior shutters can be constructed from wood, vinyl, fiberglass or other synthetic materials. Non-functional shutters can be simply screwed or bolted directly to the building, with spacers or other hardware to prevent water accumulating against the wall. Fiberglass, a material widely used for boat hulls, is not prone to rotting or twisting, is dimensionally stable and has low expansion and contraction. It is a reinforced plastic, unlike vinyl or PVC, so fiberglass shutters do not have a tendency to warp or sag. Its strength is comparable to
aluminum; however, it does not suffer from corrosion and electrolysis. Exterior shutters in France, notably in Paris, are frequently made of steel and are configured in multiple narrow full-length panels, allowing them to fold open and fit inconspicuously against the recesses at the sides of the window. Some exterior shutters in Italy, such as in towns along the Adriatic coast, slide on rollers into pockets in the wall at each side of the window. In Germany and other parts of Europe,
rolling exterior shutters on tracks (
de) have become ubiquitous. When open, these type shutters roll up into boxes concealed in the thickness of the wall above the window. They are typically raised and lowered manually, such as by a rolling pull made of flat nylon cord, but they can be equipped with electric operating mechanisms. These shutters allow some light in the room when not fully lowered, but wholly block light when completely closed. Variations include frame extensions that allow the closed shutter to swing out like an awning or Bermuda shutter. An exterior
hurricane shutter or storm shutter is used to protect windows and doors in a building against the effects of high winds, rain, and flying objects during a
hurricane, or as a security shutter over an opening. They can be made of a variety of materials such as fiberglass, steel, aluminum,
wood or composite wood and can be installed in tracks to be quickly opened and closed manually or with motorized controls. There are also high-impact-resistant plastics that can be applied to new or existing wood shutters that provide hurricane protection. ==See also==