Kelly Windows Logo Kelly Windows Home
15000 Linwood, Detroit, Michigan 48238
Phone:  313-861-6910   Or   1-800-721-5567
Fax:  313-861-6925

Frequently Asked Questions

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What are windows made of?
The easy answer is glass, plus a framework of wood, vinyl or composite materials.  However, the window industry has many options available to suit any home and lifestyle.  Quality window frames today are made from aluminum clad wood.  Windows can also be made of vinyl or vinyl-clad wood, all wood, or composites.  And there are many types of glazing options available to make windows more energy efficient.
What does "cladding" mean?
Quality windows are made of wood and then covered on the exterior with another layer, such as aluminum or vinyl.  This layer of extra covering (the cladding) gives added protection to the window and strengthens its resistance to outside weather.
How often should residential windows be replaced?
Homeowners with windows over 25 years old should consider replacing them, both to gain the best energy efficiencies and to protect the envelope of the house.  A home is an ideal candidate for a window replacement if its windows are painted shut or difficult to operate, experience ice buildup or a frosty glaze during the winter, get fogged with condensation, or are drafty.
What do U-values and R-values really mean?
U-Values represent the amount of heat that escapes through a wall window, roof or other surface. The lower the U-Value, the more energy efficient a material is.  R-Values are the direct opposite.  R-Values measure an object's resistance to heat flow. The higher a material's R-Value, the lower its U-Value, and the less energy it will lose. An R-Value depends on the number of layers of glass in a window, what type of gas is between those layers, and whether one or more of these layers of glazing have been treated with a Low E coating.
What does Low E stand for?
Low E is a non-visible, microscopic layer of silver coating added to glass for greater energy efficiency and increased comfort.  The term 'Low E' stands for low-emissivity, which is the action of reflecting light passing through glass. By reflecting part of the light spectrum (the part that transmits heat), we reduce a window's U-Value and increase its R-Value.
Are different grille pattern options available on or between the glass?
True Divided Lite, Simulated Divided Lite, Airspace Grilles and Perimeter Grilles are available in a variety of styles and patterns.  Custom configurations are available as well.
What is the difference between Simulated and True Divided Lite?
True Divided Lites are individual panes of glass, held together by mounting bars. These windows are similar to those found in colonial times.  While they look very much like the windows of yesteryear, with today's technology, these windows are extremely energy efficient and feature insulated glass or insulated Low E2 glazing.  Simulated Divided Lite windows use just one piece of glass, but have grilles adhered to the interior and exterior of the window in a variety of decorative options to give the window an overall look of True Divided Lite.  Often available with removable grilles, these windows are easy to clean.  Windows with Simulated Divided Lite only have grilles adhered to the interior and exterior - there are no airspace grilles.
What are grilles?
Grilles are lite or pane dividers that form a design partition on a window or door in a decorative pattern.
What other types of grilles are available on windows?
Airspace grilles are sealed in the airspace of insulating glass in different designs. That makes the windows easy to clean, because the grilles are sandwiched between the glass.  Removable perimeter grilles have easy snap-in designs and allow a homeowner to change the look of their windows.  Custom Grilles are also available as removable perimeter grilles and can also be easily installed and removed.
What is an impact resistant glass window?
Impact-resistant glass has strong laminated glass interlayers. When combined with an exceptionally strong window frame, this type of window provides homeowners with greater security and protection from storms, flying debris and even the occasional stray golf ball.  When struck by something hard and forceful, like a tree branch or softball, the glass resists shattering. In the rare event that an object impacts the glass, the pane may shatter, but it remains held within the frame.  This greatly reduces the risk of flying glass, water or debris penetrating into the home.
Who should have impact resistant glass in their homes?
Homeowners living in coastal areas prone to strong winds and storms, or who live directly on a golf course or in an area where vigorous sports activities take place, should consider impact-resistant glass in their homes.  Other homeowners might be interested in the sound reduction and security benefits which impact-resistant glass provides.
Will impact resistant glass prevent intruders from breaking into my home?
No glass can completely prevent intruders. Any glass, when struck repeatedly with forceful blows, will shatter.  However, the majority of impact resistant glass stays in the frame when broken, making forced entry much more time consuming, cumbersome and difficult.