How to Remove a Window Sash from Double Pane Windows

Written by kayar sprang
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To repair cracked or broken glass in a double pane window, the top and bottom sashes must be removed. Modern aluminium and vinyl frame window sashes are easy to work with, and removal does not require tools. Older double pane windows are more difficult, and care must be taken to prevent breaking the wood when removing the sash.

Skill level:
Moderately Easy

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Things you need

  • Safety goggles
  • Wide metal putty knife
  • Rubber mallet
  • Heavy-duty scissors

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Instructions

    Remove a Lower Window Sash from Modern Windows

  1. 1

    Unlock the window. Push the sliders located on top of the lower sash towards each other.

  2. 2

    Hold the left and right sliders in place while lifting up the lower sash; the bottom should be just above the frame.

  3. 3

    Carefully pull the top of the sash towards you and out of the frame. Let go of the sliders and grasp the sash firmly while pulling it towards you and out of the frame.

    Remove an Upper Window Sash from Modern Windows

  1. 1

    Pull the upper sash of the double pane window down by the handles located on the top frame. The top of the sash must be below the frame.

  2. 2

    Push the sliders on top of the upper sash towards each other. Hold the left and right sliders in place.

  3. 3

    Pull the top of the sash towards you and out of the frame. Release the sliders and grasp the sash firmly while pulling it towards you and out of the frame.

    Remove a Sash from Older Double Pane Windows

  1. 1

    Wear safety goggles when removing the stops located on the sides of the sashes. Wood-framed sashes are held in place with two wooden stops (one on each side). Slide a wide metal putty knife into the crack between the stop and the window frame. Carefully tap the knife handle with a rubber mallet to loosen the stop. As one section becomes loose, slide the knife down and loosen another section until the entire piece is freed. Repeat this step with the other stops.

  2. 2

    Grasp the top of the lower sash firmly and pull it out of the frame. If there are cords attached to the sash, hold them while you cut them with a pair of heavy-duty scissors.

  3. 3

    Grasp the top sash of the double hung window, and carefully pull it down and out of the frame. Use the putty knife to open cracks between the upper sash and the frame if several coats of paint are restricting the sash. Cut any attached cords with heavy duty scissors.

Tips and warnings

  • The bottom sash of any type of window must be removed before the top can be taken out of the frame.
  • Carefully remove wood window stops to avoid breakage, as these will be reused when replacing the window sash.

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