The bedroom in my first apartment had a window that had not been opened since the Reagan administration. At least it looked that way — multiple layers of paint sealing the sash to the frame, the lock mechanism painted into a solid lump. I wanted fresh air. The window wanted to stay shut forever.

I tried forcing it. The wood creaked. A piece of paint chipped off. I stopped before I broke something expensive.

There is a right way to do this. It takes patience and a utility knife — not a crowbar.

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Step 1: Break the Paint Seal

Take a sharp utility knife and run the blade along every seam where the window sash meets the frame. All four sides — top, bottom, left, right — both inside and outside the window if accessible. You are cutting through the paint layer, not digging into the wood.

Press firmly but do not saw. One clean pass on each seam is usually enough. If the window has a parting bead (the vertical strip between upper and lower sashes on double-hung windows), score both sides of it too.

Step 2: Loosen the Sash

Place a wood block or a folded cloth against the sash — never pry directly with metal against wood or you will dent the frame. Use a flat pry bar or a sturdy putty knife, positioned against the block, and apply gentle steady pressure. Work your way around the window, prying a little at each corner.

The goal is to break the remaining adhesion, not to muscle it open in one spot. If you hear cracking that sounds like wood splintering rather than paint separating, stop and take another pass with the knife.

Step 3: Clean the Tracks

Once the window moves, open it as far as it will go and clean the tracks. Years of dust, dead bugs, and paint chips accumulate in window tracks and make them stick again even after you free the paint seal.

Vacuum out loose debris, then wipe the tracks with a damp cloth. For stubborn residue, a spray lubricant like WD-40 or silicone spray on a rag — do not spray directly into the tracks or it will attract dust. Wipe on a thin film. This keeps the window sliding smoothly.

What If It Is Still Stuck?

If the window is painted shut from the outside and you cannot access it safely, you may need to remove the interior stop molding — the thin strip of wood that holds the sash in place. It is usually nailed in. Pry it off carefully from the center, working toward the ends, and the sash should lift right out. This is a bigger job but it is the correct way to deal with windows that have been painted shut for decades.

My apartment window took 15 minutes and a utility knife. The fresh air was worth every second.