Most double hung windows have side tabs. Push them in and tilt the sash out. Lay it on a workbench.

This requires precision, but it is the correct way to restore the window to like-new condition.

Don’t Replace Them Yet! How to Repair Double Pane Windows (And Save $$$)

Look for plastic strips holding the glass in place. Pry these out carefully with a putty knife. Label which side is up.

This is a temporary fix (lasting 1–5 years), but it costs about $20 vs. $300 for a full replacement.

Scrape out old butyl tape or silicone. The frame must be spotless.

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