Stuck window won't open
easy 20–60 min
Tools: utility knife, stiff putty knife, hammer and a block of wood, screwdriver, flashlight · Materials: silicone spray or paraffin wax, sash cord or a replacement balance for double-hung windows, paint scraper
Steps
- Score the paint line between the sash and the frame on both sides, inside and out, with a utility knife; painted-shut windows are the usual case in older homes.
- Work a stiff putty knife into the joint and tap it gently along the sash with a hammer and block to break the paint seal — never pry with a screwdriver against the glass.
- With the seal broken, tap the sash upward from below with the block and hammer at the corners, alternating sides.
- Once it moves, run a candle or paraffin wax along the tracks and clean out old paint ridges with a scraper so it keeps moving.
- If the sash lifts but drops back, the cord or balance has failed: on old windows the cord and weight are behind the side trim and are a straightforward replacement.
- Swollen wood in humid weather frees up when the room dries; a dehumidifier for a week beats planing a sash that will shrink again in winter.
Stop and call a pro if
- the glass is cracked, loose in its putty, or the sash is rotten
- the window has a broken balance and the sash falls — it can drop on fingers
- several windows are stuck after a recent exterior paint job — that is the painter's callback
- the window is a fire-escape route and cannot be opened at all
What a pro does that you can't
A handyman or window specialist frees painted-shut sashes, replaces cords, balances and pulleys, and re-glazes or replaces a sash that has rotted.
DIY cost: $0–20 for wax, scraper or cord