Step 1: Remove the Glass

Removing the Glass
Photo: Kindra Clineff
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Don gloves and safety glasses and cover the broken pane with a rag. Tap the center of the rag-covered pane with a hammer to loosen the shards.

With gloved hands, wiggle free any pieces that remain embedded in the putty.

If the sash is still in the window opening, or the pane has a crack or two but is otherwise intact, it's best to remove the putty first, then the glass.
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    Tools List

    • putty knife
      ½-inch putty knife,
      For tooling putty; should be flexible and clean.
    • painter's tool
      5-in-1 Painter's tool,
      For scraping out old putty.
    • electric heat gun
      Heat gun,
      For softening old putty.
    • paintbrush
      1-inch paint brush,
      For priming sash.

    Shopping List

    1. GLASS
    For pane dimensions, measure the opening from top to bottom and side to side, then subtract 1/8 inch from each measurement.

    2. ALUMINUM FOIL
    Protects undamaged glass from heat.

    3. GLAZIER'S POINTS
    Hold glass against sash. Tom uses push-type points with shoulders.

    4. GLAZING PUTTY
    Seals the edge of the glass against the weather. Tom uses an oil-based product in a can.

    5. EXTERIOR PRIMER
    Seals wood against moisture; extends putty life.