There is nothing more frustrating than a window that refuses to stay up. You lift it, prop it with a stick, and walk away hoping for the best — and then an hour later you hear that familiar slam from across the house. If you have kids, that sound makes your heart drop every single time. One of our upstairs bedroom windows had been doing exactly this for almost a year before I finally stopped ignoring it and tackled the fix on a Saturday morning with my 12-year-old keeping me company. The repair took us less than an hour, cost under twenty dollars, and now that window stays up exactly where you put it without any drama whatsoever.
If your windows are doing the same thing — dropping, not opening smoothly, or feeling stiff and heavy — there is a very good chance your window balances are worn out. This is one of the most overlooked maintenance items in Connecticut homes, especially in houses built between the 1970s and 1990s when spiral and block-and-tackle balances were standard. The good news is this is a completely DIY-friendly repair. You do not need a contractor. You do not need special skills. You need a little patience, the right replacement part, and about forty-five minutes on a weekend morning.
What Is a Window Balance and Why Does It Fail?
A window balance is the internal mechanism inside the window frame channel that holds your sash — the movable panel of the window — in place at whatever height you raise it to. Without a functioning balance, the sash just falls. Think of it like a counterweight system: the balance provides tension that offsets the weight of the sash so it stays put mid-travel.
There are a few different types. Spiral balances (also called tube balances) are the most common in older Connecticut double-hung windows. They look like a thin metal rod inside a vinyl or metal tube and are installed in the side channels of the window. Block-and-tackle balances use a small pulley system and are common in newer construction. Coil spring balances are found in some older windows but are less common today.
Balances fail for a simple reason: they wear out. The spring loses tension over years of use, especially in windows that see daily operation. Connecticut winters and summers put extra stress on them too — the expansion and contraction from our temperature swings works on every moving part of a window over time. Once the tension is gone, the window drops.
Tools and Supplies You Will Need
- Flathead screwdriver
- Phillips head screwdriver
- Utility knife
- Tape measure
- Replacement window balance (matched to your window type and sash weight)
- A marker or pencil
- Work gloves (optional but helpful)
- A partner to hold the sash — my 12-year-old was perfect for this job
If you already have a solid home toolkit, you likely own everything on this list already. If you are still building yours out, I put together a full guide on the tools every homeowner actually needs that is worth a read before you dive into projects like this one.
Step One — Identify Your Balance Type Before You Buy Anything
This is the most important step and the one most people skip. If you buy the wrong balance, you will make two trips to the hardware store instead of one. Trust me — I have done this before.
Start by looking at the side channels of your window frame — the vertical tracks the sash slides up and down in. On most double-hung windows you will see either a thin tube running the length of the channel (spiral balance) or a small cartridge with a cord attached (block-and-tackle). Look closely at the top of the channel for a stamp or label. Some manufacturers print the model number right on the balance itself.
For spiral balances, you need to know two things: the length of the tube and the tension rating (usually a number stamped on the end cap, like 15, 20, or 25). The tension rating corresponds to the weight of your sash. If you can remove the old balance, take it to the hardware store with you. If you are ordering online, search by brand name and those two specs. Window balance suppliers like Swisco.com are excellent for this — they have a huge inventory and helpful guides for matching parts to your specific window brand.
For block-and-tackle balances, you need the sash width and the balance series number (usually printed on the side of the cartridge). Again, take the old one with you if possible.
Step Two — Remove the Window Sash Safely
Most double-hung windows made in the last forty years have tilt-in sashes for easy cleaning and repair. This makes our job much easier. Here is how to get the sash out without damaging anything.
Raise the lower sash about six inches. You will see tilt-in latches on either side of the sash near the top. Press both latches inward at the same time and tilt the bottom of the sash toward you. This takes a little coordination — having a helper is genuinely useful here. My 12-year-old grabbed one side while I managed the other, and it went smoothly.
Once the sash is tilted, lift it up out of the pivot shoes at the bottom of the channels. Set it carefully against the wall or lay it on a blanket on the floor. Be gentle with the glass.
If your window does not have tilt-in latches, you may have an older style that requires removing a stop bead (the thin strip of trim along the inside of the frame that holds the sash in the channel). Use a flathead screwdriver or utility knife to gently pry it free. These can usually be reused if you are careful.
Step Three — Remove the Old Balance
For spiral balances: Once the sash is out, look at the top of the channel. The spiral balance is attached to a clip or bracket at the top. Use your screwdriver to unscrew or unclip the bracket and slide the tube out of the channel. If the balance is still under tension, be careful — it may want to spin. Hold it firmly and release the tension slowly before setting it aside.
For block-and-tackle balances: The balance cartridge is typically held in at the top of the channel by a single screw. Remove the screw, unhook the cord from the pivot shoe at the bottom, and slide the whole assembly out. Note exactly how it was oriented before you remove it — a quick photo with your phone saves a lot of headaches during reinstallation.
Step Four — Install the New Balance
For spiral balances: Insert the new tube into the channel with the rod end pointing down. Hook the top bracket onto the clip at the top of the channel and secure it with the screw. Now here is the part that trips people up — you need to wind tension into the balance before reinstalling the sash. Insert a flathead screwdriver into the bottom of the spiral rod and rotate it clockwise. The number of turns depends on your tension rating, but a good starting point is three to five full turns for most standard residential windows. You will feel resistance build as you wind it up.
For block-and-tackle balances: Slide the new cartridge into the channel and secure it at the top with the screw. Route the cord down to the pivot shoe at the bottom and hook it in place. Pull the cord gently to make sure it has tension.
Step Five — Reinstall the Sash and Test
With your helper holding the sash, tilt it back into the pivot shoes at the bottom of the channels. Snap the top latches back into the side jamb clips. Gently push the sash upright until it is vertical and seated properly in both channels.
Now test it. Raise the sash to different heights and let go. It should stay put — not perfectly still, but it should hold without dropping. If it drops slowly, you need a little more tension in the balance (add a turn or two). If it shoots up on its own, you have too much tension (unwind it a turn). This adjustment takes a little trial and error, but once you dial it in, it will stay there for years.
We did both side balances on the same window that morning, and by lunch everything was working perfectly. My 12-year-old was genuinely proud — he had helped with the whole thing and understood exactly why it worked. That kind of hands-on understanding of how your home functions is something I want all my boys to grow up with. There is real satisfaction in fixing something broken and knowing you did it yourself.
When to Replace Both Balances at Once
If one balance has failed, the other is usually not far behind — especially if they were installed at the same time. I always replace both sides simultaneously. The cost difference is minimal and you save yourself from doing the same job twice in six months. Buy a matched pair when you order.
While you have the sash out, take a few minutes to inspect the window itself. Check the glazing compound around the glass if it is an older wood-framed window. Look at the condition of the frame and sill — if you spot rot or deterioration, that is a separate issue worth addressing. I covered the full process of replacing a damaged window sill in an earlier post if you need it. Also check the exterior window casing while you are at it — I have a guide on fixing worn exterior window casing that walks through that repair step by step.
Connecticut-Specific Considerations
Here in Connecticut, our housing stock skews older. A significant portion of homes in towns across the state — from Middletown to Milford to Meriden — were built between 1950 and 1990, and those windows are at the age where balances are routinely failing. If you have original windows in a home that is thirty or more years old, this repair is almost inevitable.
The good news is that our New England winters make window performance matter more than in milder climates. A window that does not stay up is not just inconvenient — in winter you lose heat every time it slips, and in summer you lose ventilation. This is a comfort and efficiency issue, not just an annoyance. The ENERGY STAR guidelines for windows are worth reviewing if your windows are aging and you are wondering whether repair or full replacement makes more sense for your situation.
For most homeowners, replacing the balances and doing the maintenance repairs I have described will extend the life of decent windows by ten to fifteen years. Full window replacement is expensive — we are talking $400 to $1,000 per window installed. A pair of replacement balances costs $15 to $30. The math is easy.
If your window drafts are worse than the balance issue alone explains, make sure you also check the weatherstripping around the sash. I covered weatherstripping a drafty door in detail — the same principles apply to windows, and it is another inexpensive fix that makes a real difference on a Connecticut winter day.
A Quick Word on Safety
This is a low-risk repair with a few common-sense precautions. Do not attempt to remove a sash on an upper floor without a secure place to set it. If the window is large or the glass is heavy, get a helper — this is not a one-person job. If your window has a broken glass pane in addition to a failed balance, fix the glass first or have it fixed before you do this repair.
If your home was built before 1978, be aware that your window frame may have lead paint. The EPA’s Renovation, Repair, and Painting guidelines apply to work disturbing lead paint surfaces, so use appropriate precautions — gloves, a dust mask, and careful cleanup — especially if you are sanding or scraping any paint during this process.
The Bigger Picture
I will be honest — replacing a window balance is not the most exciting Saturday project. But it is one of those repairs that makes your home feel tighter, work better, and just function the way it should. There is a kind of quiet faithfulness in maintaining what God has given you. Taking care of your home steadily, one repair at a time, is how you protect your family and preserve what you have worked hard for.
My boys have watched me tackle dozens of these repairs over the years, and I think the biggest thing they take away is not the technical knowledge — it is the mindset. When something breaks, you figure it out. You do not panic, you do not immediately reach for your wallet, and you do not wait six months hoping it fixes itself. You roll up your sleeves and get to work. That lesson is worth more than any single repair, and it costs nothing extra to teach.
If this is your first time tackling a window repair, do not overthink it. Buy the right balance, take your time on the removal and installation, and give yourself permission to do it imperfectly the first time and adjust. That is how everyone learns — and your window will stay up just fine regardless.
