How to Open a Stuck Window

It’s not uncommon for older homes to have windows that have been stuck for years. You might decide to replace them, believing they were closed for a reason. But it is possible that the windows are stuck for another reason and are still fully functional. Before you even think about showing off your existing older windows, it’s best to consult with a window restoration expert like Alison Hardy, owner of Window Woman of New England and President of the Window Preservation Alliance, who can advise you on what the problem might be and if it is a solvable one.

Broken panes, shattered glass, and other tricky window problems are likely jobs for the pros, but when old windows are stuck, you can probably tackle it yourself. Here, Hardy shares all the details on how to fix a stuck window, starting with what can be causing this household problem in the first place.

Which causes a window to get stuck

“Paint is inherently sticky [clings to] the painted surface,” says Hardy. “If something like a window sash doesn’t move after it’s painted, it can seem to get welded.” For this reason, if you’re painting your home, she recommends opening and closing all windows for a few days after painting, around make sure they don’t start to stick. Paint isn’t the only culprit when it comes to stuck windows. Sometimes moisture in the wood or resin can be to blame. “In spring, you’ll find opening your windows for the first time in months is more of a challenge, but patience will prevail,” says Hardy.

When to call a professional

As with most DIY projects, there usually comes a point when a homeowner realizes it’s time to call in the professionals. “If the glass isn’t securely attached to the wing, it can quickly become dangerous,” Hardy warns. Rotten wood and large, heavy windows could also be a reason to call the experts. “The good news is that old windows can be repaired. So if something breaks, it can be fixed,” says Hardy.

How to open a hanging window

According to Hardy, the first things you need to do to open a stuck window are time and patience. If you’ve met both requirements, follow Hardy’s step-by-step guide to learn how to open painted windows. Hopefully you don’t have to go through all three steps before your window gives out.

What you need

• Utility knife or 5-in-1 tool for painters
• hammer (optional)

Step 1: Remove bindings on lower wing

Using a utility knife or 5-in-1 tool, go around the edge of the lower wing to cut the paint line or caulk. Remove anything causing the problem. A hammer can help break stubborn bonds.

Step 2: Remove the bindings on the meeting rail

Test the window to see if it moves. If not, use the tool on the connecting rail (where the top and bottom wings come together) to try to pry the two wings apart.

Step 3: Remove the cowling

With steps 1 and 2 complete and the window still sticking, you can remove the trim piece known as the front stop to get the lower sash moving. This is also a necessary step when replacing broken sash cords. Most front stops are ½ inch thick and are attached with screws. Remove the screws, then run your cutting tool along the front fence hinge to the fairing. Carefully pry off the front stop, starting in the center. Once the stop is removed, gently pull the window up to open it.

What you should know about sash chords

No discussion of stuck windows is complete without mentioning window cords. “[One] What most homeowners don’t realize is that on most windows built after 1900, both the top and bottom sashes are operable,” says Hardy. “It’s called a double-hung window.” Opening both the top and bottom sash helps air circulate, especially on hot days, but it relies on a sash cord to function properly. “This counterbalancing system is ingenious — and maintaining its functionality will make your home that much more comfortable,” says Hardy. “Replacing all four sash straps (two for the top and two for the bottom) is no difficult task and means your windows will function safely and easily for decades to come.