A Helpful Guide to Some of the Different Types of Window Balances

When you get into the weeds with the different mechanical components of your home, like locks, doors, and windows, it’s easy to get confused. The jargon, technical terms, and mechanical complexity of it all can be quite overwhelming. 

The truth is, there is quite a lot going on “behind the scenes” with windows. It’s not just a pane of glass; window specialists have taken great pains to ensure that the parts all work together fluidly, and one of them (which makes using the window easier) is a part known as a window balance. 

But what is a window balance, what does it do, and what are the different types? You’d better know that before you spring for a window balance replacement. This short post should offer some insight into the matter.

What Does a Window Balance Do?

First, to understand the different types of window balances, we must know what they are. A window balance is a system that is hidden within the window frame, which serves as a counterbalance to the weight of the window, making it easier to open and close. Found in both residential and commercial settings, window balances, also known as window springs, balancers, and window sash balances, effectively serve as a window opening “assist.” Without a balance, it would be much harder to open the window against its own weight or against the weight of the sash.

Moreover, there are many different types of window balances that all work in slightly different ways, even though the function they perform is effectively the same. These are among the most common types of window balance configurations. 

Block and Tackle Balances

Block and tackle window balances are among the most common types of balance in the modern market, and consist of a series of pulleys, a cord, and a spring. 

The pulleys serve as a “block,” whereas the “tackle” the cord, stretches or compresses the spring as the operator opens or closes the window. The pulleys also add mechanical advantage into the framework; like other types of window balances, block and tackle balances reduce the force needed to open or close the window, through the action of the pulleys and spring. 

Block and tackle balances are sized according to two criteria; the length of the window’s metal channel and another criterion called the “stamp.” This stamp on the balance indicates the balance length, and it might also indicate the gauge of the spring used along with the appropriate weight rating. 

However, stamp ratings can be hard to decode, so it’s important to speak with a specialist before you attempt to buy a block and tackle window balance replacement based only on the stamp. Contact us if you have any questions about the details. 

Rope and Pulley Balances

Rope and pulley balances are one of the oldest types of window balance systems, and rely on a weight (or a series of weights) to counterbalance the weight of the sash. These weights are paired with a rope and pulleys that help the user open or close the window. 

While the rope and pulley system can be effective, it suffers a major drawback in the form of the ropes which connect to the weights and pulleys, which can fray and snap over time. When this occurs you can either replace the rope or chains. Of course, depending on the window in question, you may also have the option of upgrading to a newer window balance replacement.

Clock Spring Balances

Clock spring balances are another type of older window balance that are often found in older window installations. These utilize a coiled metal spring (like a clock spring hence the name) which is contained in a metal housing, which provides the tension to offset the weight of the sash. They are commonly mounted overhead or on the side of the jamb. If you have questions about clock spring window balance replacements, get in touch with us. 

Spiral Window Balances

Spiral window balance systems are another common type of window balance, consisting of a spiral-shaped rod, connected to a spring, all housed within a tube. The spring provides tension to help offset the weight of the sash/window. 

The tension can also be adjusted by winding via the aid of a spiral balance tensioning tool, in order to match it to the sash with which it is being used. This means that spiral window balances are highly adjustable and can be used with a wide range of different windows. 

Fortunately, it is also the case that finding window balance replacements for spiral balances is fairly straightforward, if you know the length of the tube, the color of the nylon bearing/bushing(which corresponds to the weight of the sash), and whether the window is a tilt or non-tilt window. 

Of course you can also contact us if you have any questions and we will be more than happy to help. 

Coil Spring Window Balances

As the name suggests, coil spring balances contains a coiled spring contained in a housing, which provides a constant tension to help counteract the weight of the sash. Constant force coil window balances are quieter and smoother than other types of window balances, but have many parts, including the spring cover, balance drum and pivot lock shoe in addition to the spring. Notwithstanding the fluid operation of the mechanism, the complexity can make it slightly difficult to find window balance replacement parts, so if you have questions, get in touch with us.

Crossbow Window Balances

Crossbow window balances are an older style of tilt window balance. This type of balance is very similar to inverted block and tackle balances which use a pulley system with a cord and plastic end cap on the bottom. They are available with a ½” diameter spring and 3/8” diameter spring and in a variety of sizes to fit your needs.

How to Tell When You Need a Window Balance Replacement

Because the window balance is there to ease opening and closing of the window, two of the biggest indicators that you need a window balance replacement are when the window takes too much force to open or close, or when the window slams shut unexpectedly after being opened. If you notice either of these symptoms, you need to take a closer look and might need to find a replacement.

Here for a Window Balance Replacement?

If you’re suspicious you might need a window balance replacement because your window is hard to open or close, or will not stay open, but aren’t sure what you need, get in touch with us. You can reach a real live person familiar with window and door replacement parts at 727-386-4629; contact us today and we’ll help you find what you need to make a fix. We carry many parts for some of the top window brands including PGT, Weathershield, Silverline, Jeld-Wen, Pozzi, Peachtree and many others.