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Virginia Beach Roofing: Article About Energy Efficient Windows

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Homeowners can choose from a wide variety of options when purchasing windows. A window's frame material, geometry and glass type all affect the temperature of a house, so choosing the right windows can increase the comfort of a home and save money on utility bills. A Virginia Beach roofing and window specialist can help with the selection as well as the installation.

The frame takes up 25 percent of a window's area, so it is important to choose a frame that prevents excessive heat from passing through. Aluminum frames are a poor choice for energy efficiency since metal conducts heat better than other materials such as wood. Wooden frames are excellent insulators, but they require regular maintenance because they are prone to deteriorating paint and rotting. An alternative is the wood clad frame, which is insulating wood covered with a low maintenance material such as vinyl or aluminum. However, wood clad frames can still potentially allow water to seep inside and cause rotting in wet climates. Vinyl frames are good insulators and are weather and moisture resistant, but the frames fade and may not be aesthetically pleasing to some people.

Window glazing is the glass component of a window. Sophisticated windows that can significantly cut energy consumption are now available, thanks to recent advancements in window glazing technology. Insulated windows and low emissivity glass coatings are examples of energy efficient glazing types.

A roofing expert from Jayhawk Exteriors of Virginia Beach VA would be happy to answer any question you have about roofing, skylights or siding.

An insulated window is made of two or more glass panes spaced some distance apart and hermetically sealed, so a layer of air is trapped between the panes. This insulating air space impedes heat flow through the window. In a gas filled window, the space between the panes is filled with a low conductance gas such as argon or krypton. These gases are more effective at blocking heat flow than air.

A low emissivity (low E) glass coating keeps heat from entering a house during summer while preventing heat from leaving the house in winter. Low E coatings control heat flow through windows by reflecting certain wavelengths of light while transmitting others. Longer wavelength infrared radiation, which is felt as heat, is reflected from a low E coating. This prevents the sun's heat energy from entering the house on a warm day. At the same time, the low E coating allows shorter wavelengths of visible light to pass through. The visible light is absorbed by walls, furniture and other objects in the house and emitted in the form of infrared radiation. The window's low E coating reflects the emitted infrared energy back into the building, so the house stays warm during the winter.

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