A window balance is a small part of most home windows that many people don’t really think about until an issue pops up.
When they stop working, moving your window at all becomes much more difficult. To fix these problems, you need to know what kind of balance your windows have.
Here is a quick guide to types of window balances and how they work:
Understanding Window Balance Systems
Window balances are essential components of single- or double-hung windows and sash windows.
Modern balance systems use advanced springs and counterbalances to reduce the force needed to lift or lower the window sash.
Older systems, such as weight balances with lead weights, are less common but still found in historic homes. Identifying your window balance system is crucial when repairs or replacements are needed.
Caution: Replacing or adjusting window balances requires precision and the right tools. Because these components operate under spring tension, improper handling can result in injury.
Block-and-Tackle Balance
Block-and-tackle window balances are common in homes built in more recent years. Some people refer to them as channel balances as well.
Block-and-tackle window balances usually have two or more pulleys that help you open and close the window more easily. Using a cord and a spring located near the top of the balance, they reduce the amount of force you must exert to move the window around.
Block-and-tackle balances are known for their durablility and smooth functionality, making them a popular choice in modern homes.
Coil Balance
Another widely used modern window balance system is the coil window balance. These are also known as constant-force balances because a small metal coil is constantly exerting force on the window when it’s connected.
If you remove the window sash, coiled balances are easy to see because of the wound-up metallic coil left behind. This coil extends and retracts as you move the window, reducing the force you need to use.
Constant force balance systems are common in residential windows and provide smooth operation over time.
Spiral Balance
You might find spiral (or tube) window balances in homes built a few decades ago.
After removing the window sash, you can easily tell if you have this kind of balance because of the metal tube you’ll see behind it. Inside this tube is a spiral rod that attaches to a spring, both of which support the window and make it easier to lift or bring down.
Spiral window balances are common in older wood windows and typically require occasional lubrication to maintain smooth function.
Weight & Pulley Balance
Another relic of older wooden windows is the weight and pulley balance. Removing the sash on a window with this balance will reveal the counterweights on both sides of the window.
Essentially, these windows have small pulley systems that rely on these sash weights to offset the weight of the sash itself. Each counterweight will be almost exactly half the weight of the sash, so they evenly distribute the weight over the whole window.
Pulley window balances are typically found in older homes but can be updated to more modern balances.
Other Common Balance Systems
In addition to the traditional window balances, several other types are used in modern and commercial windows:
Tilt Balances: Found in tilt-inwards windows, these allow the window sash to be cleaned easily. The pivot lock shoe is essential for their function.
Tube Balances: Similar to spiral balances, but featuring a different balance drum design for improved durability.
Counterbalance Systems: Used in older homes, often incorporating lead or springs to offset the weight of the sash.
How to Identify Your Window Balance
If you’re unsure which type of window balance you have, follow these steps:
Measure the Window Jambs: Use a tape measure to check the length of the window jamb and the depth of the balance system.
Inspect for Visible Components: Remove the sash and look for spiral rods, metal tubes, counterweights, or pulleys.
Check for Markings: Some balances have stamped numbers or labels indicating the type of window balance.
Signs Your Window Balance Needs Replacement
Over time, window balances can wear out. Here are common signs that indicate it’s time for a replacement:
- Windows don’t close smoothly or stay open.
- The spring balance feels loose or disconnected.
- The window sash is too heavy to lift, indicating failure of the balance spring cover or constant force balance system.
- The spiral balance system does not provide enough support, making the window difficult to move.
Choosing the Right Replacement Balance
Selecting the correct window balance depends on several factors:
Window Type: Single-hung windows, double-hung windows, and tilt windows require different balance systems.
Weight & Size of the Sash: A proper counterbalance helps windows operate smoothly.
Durability: Newer window balances use durable materials to extend the lifespan of your windows.
How We Can Help
Call the Experts at Tualatin Valley Glass
Window balances are delicate pieces of construction, so if you need window balance replacements from an expert, give us a call here at Tualatin Valley Glass.
We have years of experience repairing and replacing all manner of window balances, from block-and-tackle balances to constant force window balance systems.
Whether your home has modern or older wood windows, we ensure your window balances functions correctly so you can go back to using your windows without extra hassle.
Caution and Safety Warning
Replacing or adjusting window balances requires precision and the right tools. Because these components operate under spring tension, improper handling can result in injury.
Our trained technicians specialize in coil spring balance replacement and other window balance systems, ensuring safe and effective repairs.
If you need assistance, don’t hesitate to reach out—after all, we know window balances inside and out!
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