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A window is the architectural and structural feature of building built to allow light, air and sound to enter in the building. The windows can be sealed or covered for custom use. Usually windows are covered with transparent material like float glass and is held to the wall by frames. Windows maybe opened to provide the passage of air and maybe closed if not Outdoor Pillar Factory in China required. The history of windows starts with a hole in the wall for passage of air and light. Later windows started to be covered with fabrics or animal skins. With the passage of time, windows developed into structural element of the building that provided both protection and light from outside.

The Romans invented the glass windows. Glass became common in the windows in Greece and Britain as well. The churches made during dark ages and Middle Ages were decorated with mosaics because high windows provide light to enter the church and made the mosaics glitter in light. The modern windows have developed into a variety of types made with different materials. Some of the popular window types include double-hung sash window, single-hung sash window, horizontal sliding sash window, casement window, awning window, hopper window, tilt and slide window, tilt

and turn window, transom window, jalousie window, clerestory window, skylight, roof window, roof lantern, bay window, oriel window, thermal window,fixed window, picture window, French window, stained glass window and emergency window. All these types provide the common purpose of protection but in specified diversities. They are constructed by splitting into two or more panes for maximum insulation. For a large window, small size panes are joined together and fixed in frames. Light colored muntins reflect light and make the window a reflective surface to diffuse light. The beam over the top is called lintel and at the bottom is called sill plate. Windows are covered with materials to manage sunlight, weatherproofing, privacy and decoration. The most used devices to cover windows include drapes, curtains, blinds, shades and shutters. Although drapes and curtains are the most popular forms of covering in homes for their aesthetic diversity, other coverings are also used widely.

Curtains and drapes add more color, flow and design element in the formal interior of any room and are an important component of interior design. Blinds and shades are added to more informal and workable places like offices and informal areas of the house. Shutters are solid window coverings consisting of frames within which louvers are fixed. The louvers can be of any materials like fabric or glass and can be movable or fixed. The shutters can be both external and internal coverings of the windows. Exterior shutters maybe made of wood, fiberglass, iron or aluminum. Highly quality plastic is also used in the exteriors sometimes. These solid panels are usually fixed for maximum protection against extreme winds, hurricanes and weather conditions. Interior shutters are usually more beautified with the use of fabric or glass. Sometimes they are also used for the covering of doors.

When shopping for window covering, you need to examine certain factors to land you the right covering. There are also different functional reasons that should prompt you to have your windows installed with covering.Light ControlLight is quite hard to control but you will have help in the form of window covering. There are different kinds of coverings.• Transparent. Clear glass is used. This is rare these days due to the issue of privacy. However, some buildings use this when it is situated in a slightly hidden area or when the window is covered with a bit of foliage to obscure the light from outside.• Translucent.

Sheer covering is used. Examples would be bamboo shades and light fabric drapes.• Filtered. This only allows subtle shades of light to come in as how mini-blinds and medium fabric drapes function.• Semi-opaque. Light is only allowed to come into the room through the edges or the narrow gaps in the window coverings. The best examples for these China die casting outdoor post lamp coverings would be shutters.• Opaque or black-out coverings. These coverings block out all light. However, you can rarely find such coverings in the market.Even if you will prioritise the amount of light that you will keep out, you should also consider the amount of light that the covering will allow in. Some window treatments would allow your windows to be seen as something transparent.PrivacyThis can be achieved whenever you will use window covering. The minimum covering that should provide you with privacy should be translucent or even better.

Glass block or frosted glass can also protect you from those outside.Expected LifeCoverings for windows would shield you from sunlight, fluctuating temperatures, and humidity. As you will always use these window coverings always, this factor along with the others previously mentioned will shorten the life span of the coverings. Fabric window coverings have the shortest life span among the coverings while solid window coverings have longer life expectancy.VersatilityThere are certain coverings which are considered appropriate for formal appeals while some are for casual environments. If you want to have something appropriate for both, you should buy some coverings that will blend for both.CleaningWindow coverings are the front liners that will face dust and dirt. Fabric coverings might be less ideal to have since it is even more difficult to clean them.

Quality window coverings will only require some wiping to clean them up.StyleIt is important for window coverings to be attractive which means that these coverings should have colours that are becoming and patterns that are unique. There are many other options that you have to decide for.SafetyCords in window coverings and even the coverings themselves should be out of reach of children for their safety.PriceDo not just look at the visible price tag of the coverings. You should also weigh in some other benefits and disadvantages. Cheaper window coverings may need to be replaced more constantly than the more expensive ones such as shutters which can become more or less permanent fixtures on your window.DesignWindow design which can vary from bay, shallow windows, and the like would need special installations of coverings.