How to repair the glass in a window

Keep the protection from the cold that storm windows by repairing the glass in them before putting them in the cold season. Glass in storm windows can be repaired in the same way as a window pane of a leaf, only it is easier because the window is designed to be taken on and off depending on the season. Storm windows act as barriers during cold weather and increase the insulation value of your home windows, so it is important to make sure they are in good condition.


  1. Lay the window needs repair on a surface with the glass putty facing up. Remove the old glass putty from around the edge of the glass in the window with the edge of a spatula. Lift carefully along the edges of the putty until gently can be removed.
  2. Remove artificial glassware points from the wood around the glass by lever with a flat head screwdriver. The points hold the glass ladder against the wood in the storm window. They are spaced evenly around the glass panel.
  3. Lift up on the glass and remove by applying even pressure on the back. Take care when removing broken glass.
  4. Sand the wood around the opening with a sanding block to make the surface smooth in preparation for window replacement glass. Always sand by following the grain. Brush the sanded area with a tent brush.
  5. Apply a thin window flange seal around the window opening where the glass rests with a caulking gun.
  6. Lay the glass replacement on the window and press firmly into place to seal against the putty.
  7. Points • push new Artificial glassware into the wood to hold the glass in place at or near the points around the window where I removed. Use the flat head of a screwdriver to push on the wood.
  8. Glaze around the window with glazing putty. The edge of a spatula is an effective way to achieve a smooth clean grain satin around the window. The angle should be even around the entire window to fill in the corner seam where the glass meets the wood.

Tips & Warnings

  • Glazing windows requires practice. If you do not understand well on the first try, keep trying until you have a glazed surface without problems.
  • Wear gloves and safety glasses when working with glass.