Replacement Windows Vs. Replacement Channels

Replacement Windows

• Replacements windows can include anything from a change in the glass to changes in the entire window assembly. This can mean replacing single pane windows with double or triple pane windows, or wooden frame assemblies with vinyl or aluminum. Homeowners might look for opportunities to improve energy efficiency as well when they select replacement windows to reduce heat loss in winter and heat gain in summer. This is referred to as improving the R-value of the window. For example, a single pane window might have an R-value of 1.1 and a double pane window filled with argon gas might have an R-value of 3.2, according to American Window Glass. The higher the R-value, the more energy efficient the window.

Window Channels

• A window channel is a metal troughlike strip that fits inside of the window frame. The channel houses the mechanisms that lift and lower the window. The primary types of window channel systems are sash cords, chains, counterweights, coil spring lifts and spiral lift balances. Sash cords, chains and counterweights are more prevalent in older window systems installed prior to the 1950s. Coil spring lifts and spiral lift balances are inventions that are more modern and commonly installed on new windows with vinyl or metal frames and sashes and for double- or triple-pane windows.

Similarities

• When you replace an entire window unit, it includes a new window channel assembly. For example, if you tear out an old wood-frame window and replace it with a new double-pane window, it will have an entirely new window channel system. This might include converting from a cord system to a coil spring lift window channel system to make it easier to open and close the window and help keep the home airtight in winter.

Differences

• The type of window glass you select can impact the type of channel system you will need. For example, if you convert from single pane windows to triple-pane windows, the weight of the window assembly will increase. As a result, your choices may require converting to newer spring-style channel systems, as opposed to the old-fashioned chain and counterweight systems, which are not strong enough to carry the weight-load of multiple panes of glass.

Considerations

• You have to decide whether you want to maintain the historic architectural integrity of the home when you replace a window and/or channel system. For example, an older home might have four individual panes of glass in a window, which is called a “true divided light” window, while a new replacement window might have a plastic grill-like piece to replicate the look of individual panes but in reality only has one pane of glass. Or, you might opt for spring coils for convenience, but stick with wooden sashes and frames instead of vinyl or metal so the change is not glaring and a total departure from the historic style of the home. Aim to strike a good balance between costs, energy efficiency improvements and alterations in style when you decide on replacement windows and channels.