Madison Window Replacement

Window Replacement FAQs & Terms

Homeowners often have many questions about replacing their windows, and rightfully so. ClearView has compiled a list of commonly asked questions, as well as a list of terms and definitions to help you navigate the process. If you have any questions, or would like to schedule a free estimate, please contact us today.

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MAdison Window Specialists


Window Replacement

Terms & Definitions


Air Chambers

Air Chambers are small spaces within the extruded sash and frame profiles that help to insulate and strengthen the window. Premium windows have insulated chambers.

Argon Gas

Argon gas is an inert, non-toxic, invisible, insulating blanket that replaces most of the air during the manufacturing process between two panes of glass.


Balance System

A balance system is a device for holding vertically sliding sashes in any position through the use of a spring or weight to counter balance the sash.

Bay Window vs. Bow Window

Bay Windows consist of three windows in a single frame. The center lite is always twice as wide as the sidelites. Generally, Bay Windows are a combination of fixed centers, and two operable flankers (casements or double hung windows). Bay Windows project out from the house wall at 9, 15, 30, 45 or 90 degrees.

Bow Windows consist of 3, 4, or 5 windows in a single frame. All of the windows are equal size, and are generally a combination of fixed centers and two operable flankers (casement or double hung windows.) Bow Windows project from the wall of the house at 9, 15, 30 and 45 degrees. Bow Windows are similar to Bay windows, but the Bow Window’s combination of windows has a more circular arch appearance.



Condensation is a natural occurrence on all windows and is caused by humidity, or invisible water vapor, present in the air. When this water vapor comes in contact with a surface that is cooler, the vapor turns into droplets of moisture.  Check out our Condensation & Humidity in Homes Blog to learn more about condensation.

ClearView windows have built-in features to keep the temperature of the glass as warm as possible and thus reduce condensation. Our insulated glass provides superior energy efficiency to reduce the potential for condensation. However, there is no such thing as a condensation-free window in high humidity conditions. Controlling the amount of moisture in your home is the most effective action you can take to avoid condensation.


Double Pane Glass

Two panes of glass in the frame create a thermal break. The space between panes normally is filled with Argon gas, keeping the glass warmer. (Double hung window approximately a .30 U-factor window with Argon gas & Low-E)


Energy Star

Energy Star™ is a joint program of the U.S. Environmental Protection Agency and the U.S. Department of Energy, helping us all save money and protect the environment through energy efficient products and practices. Energy efficient choices can save families about a third on their energy bill with similar savings of greenhouse gas emissions, without sacrificing features, style or comfort.

Energy Star™ helps you make the energy efficient choice. If looking for new household products, look for ones that have earned the Energy Star™. They meet strict energy efficiency guidelines set by the EPA and the US Department of Energy.



Fusion-welding is the process of joining materials by melting them together with extreme heat, resulting in the materials bonding into one piece. Vinyl window sashes and frames are fusion welded.


Garden Window

90 degree Bay Window (Box Bay) that has a slanted glass roof with windows that open on each side. They are normally found over a kitchen sink and are used typically to grow plants.

Grids / Muntins

Grids are decorative, horizontal or vertical bars installed between the glass panes or on the outside to create the appearance of the sash being divided into smaller lites of glass


Insulating Glass

Insulating glass consists of two pieces of glass sealed to a spacer. This creates an insulated air space between the two pieces of glass (filled with either Argon or Krypton gas), resulting in better thermal performance. Insulated glass also reduces condensation while keeping the heat in during the winter, and heat out during the summer.


Krypton Gas

Krypton gas is an inert, odorless, colorless, tasteless, non-toxic gas that is denser than air. It is used to replace most of the air between the glass panes in an insulating glass unit to reduce temperature transfer and deter convection (heat transfer by currents that flow from a warm surface to a colder surface). Krypton is a better insulator than Argon gas.


Low-E Glass

Low-E (Emissivity) glass is treated with thin, virtually invisible, transparent coatings of various layers including metal oxide and silver. During the winter, Low-E glass allows the sun’s natural light and short-wave energy to freely pass through while reflecting long-wave heat energy back inside, keeping your home warmer. In the summer, Low-E glass reflects long-wave heat energy to the outside keeping your home cooler and, reduces the penetration of the sun’s ultraviolet (UV) rays, minimizing the fading of carpet, furniture and draperies.

Low-E Glass with Argon Gas

Added inside an insulating glass unit with Low-E Glass, Argon gas is an invisible, insulating blanket that replaces most of the air during the manufacturing process. With Low-E reflecting heat away, Argon gas buffers thermal transfer to enhance the performance of the entire glass unit.


Single Pane Glass

One pane of glass generally 1/8” thick. Doesn’t have any thermal break. (Double hung window approximately a 1.00 U-factor)


Tempered Safety Glass

Tempered Safety Glass is treated with high heat for strength. If tempered safety glass is broken, it will shatter into very small pieces instead of shards. It is 400 to 600% stronger than standard glass.

Thermal Break

Area that can slow the flow of heat or cold.

Triple Pane Glass

Three panes of glass often with Krypton gas in the space between panes. Krypton gas is used for thinner/smaller air spaces performing the same function as Argon gas with double panes. Krypton is a better insulator than Argon. (Double hung window approximately a .20 U-factor)


Window Sashes

A sash is the part of the window or door that contains the glass. Sashes can be made out of wood, vinyl, fiberglass or aluminum.