How to Open Painted Shut Windows in Old Houses Without Damaging the Frame

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Step 1: Inspect the window

Look closely at where paint has sealed the sash to the frame. Check for loose putty, cracked glass or rotten timber before you start.

Step 2: Score the paint line

Run a craft knife along every painted seam where the window meets the frame. Take your time so the paint film separates cleanly rather than tearing the wood fibres.

Step 3: Loosen the sash gently

Work a thin putty knife into the gap and move it slowly along the joint. If needed, tap very lightly with the handle to ease the sash free without forcing it.

Step 4: Free any stuck edges

If the lower or upper sash still will not move, repeat the scoring and easing process on each side. Do not lever hard against the frame, as old timber can split easily.

Step 5: Test and clean up

Once the window moves, open it a little at a time and check for any remaining paint bridges. Clean away dust and loose flakes, then touch in exposed areas if needed.

💡 Pro Tips

• Work slowly; old windows often free up with patience rather than force.
• Use a sharp blade so you cut paint cleanly instead of pulling fibres.
• Keep a vacuum nearby to clear loose flakes as you go.
• If the frame sounds cracked, stop and reassess before proceeding.

⚠️ Safety First

Wear gloves and eye protection, and be careful of old paint, sharp glass and splinters. If the paint may be very old, treat any dust with care.