How to Fix a Stuck Double-Hung Window: Replacing the Balances

There’s nothing quite as frustrating as a double-hung window that won’t stay up. You prop it open with a stick, only to have it crash down the second you turn your back. Or maybe your window is stuck halfway and refuses to budge at all. Before you call a professional and spend a small fortune, take a deep breath. The most common culprit behind these troubles is a worn-out window balance, and replacing them is a DIY project you can absolutely handle over a weekend.

Window balances are the hidden heroes inside your window frame. They are the spring-loaded or tension-based mechanisms that counterbalance the weight of the sash, allowing it to glide up and down smoothly and stay put at any height. Think of them as the muscles of your window. Over time, those muscles get tired. Springs lose their tension, cords snap, or friction mechanisms wear down. When that happens, your window starts acting up. The good news is that balances are designed to be replaced, and the basic process is the same across most modern double-hung windows.

Before you run to the hardware store, you need to figure out what kind of balance you have. Take a close look at your window track. You’ll likely see one of two types. The first is a spiral or coil balance, which looks like a metal tube with a small spiral rod sticking out the top. The second is a block-and-tackle balance, which uses a cord or tape that runs through a series of pulleys inside a metal casing. Both work on the same principle, but they require different replacement parts. If you aren’t sure, pop off the side jamb liner — the plastic or metal strip that runs along the track — and pull out the sash carefully. The balance will be attached to the bottom of the sash or inside the jamb. Write down any numbers or markings you see. That’s the size and weight rating you need to match when buying new ones.

Once you have your new balances in hand, the actual replacement process is surprisingly straightforward. Start by removing the window sash. With the window closed, pull up on the sash until it tilts inward at the pivot points. You may need to remove a small locking pin or pop the sash out of the track. Always have a helper for this part — windows are bulky and can be heavy. Set the sash on a padded work surface so you don’t scratch the glass or frame.

Now look at where the old balance connects to the sash. On many windows, there is a clip at the bottom of the sash or a pin that plugs into the balance shoe. Gently release that connection. If the balance is still attached to the jamb, you might need to lift a retainer clip or twist the balance to free it from the track. Take your time — these parts can be brittle with age. Once the old balance is out, slide the new one into the channel, making sure it sits flush. Then reconnect the clip or pin to the sash exactly the way the old one was attached. Push the sash back into the track, tilt it upright, and test the operation. The window should now move smoothly and hold its position.

One thing many homeowners overlook is how important it is to match the balance to your window’s weight. If you get a balance that is too weak, the window will still fall. Too strong, and you’ll fight to pull it down. Most balances are sold in ranges based on sash weight, so a bathroom scale can help you get it right. Weigh your sash after removing it, then choose a balance that covers that weight.

Of course, not every window problem is a balance issue. If your window still sticks after replacing the balances, check the tracks for dirt, paint, or old weatherstripping. A good cleaning with a vacuum and a little silicone lubricant can work wonders. If the sash itself is warped or the frame has shifted, that’s a bigger job. But nine times out of ten, a stubborn double-hung window just needs fresh balances.

Replacing window balances is one of those projects that feels intimidating until you actually do it. The parts are affordable — usually under twenty dollars per balance — and the tools you need are basic: a screwdriver, maybe a utility knife, and a pair of pliers. A little patience goes a long way. And when that window glides up effortlessly and stays exactly where you want it, you will feel a genuine sense of accomplishment. Plus, you’ll save yourself the cost of a service call, and you’ll have the satisfaction of fixing your own home.

So the next time your double-hung window gives you grief, don’t reach for a stick or a stack of shims. Reach for a replacement balance instead. Your window — and your peace of mind — will thank you.