Your Andersen® Perma-Shield® Gliding Windows, manufactured from 1971 to 1992, open and close by sliding along the window frame. If your window sash, or windowpane, looks crooked in the frame when it is open, some minor adjustments may need to be made.

How to Adjust Your Gliding Window Sash

This article will walk you through checking the operation and adjusting your crooked Perma-Shield® gliding window sash in a few quick steps outlined below.

Adjustments can be made to the two (2) small, screw-like parts called the bottom rail glides. The glides are nestled in the bottom of the window sash's frame, and if their tightness is not the same, it can make your window look crooked when it is open.

A Bottom Rail Glide — Only the Head of the Screw will be Visible

This Article Will Help You:

• Check operation.
• Adjust your gliding window sash.

Safety Warning

Tools and Supplies Needed

• Safety glasses
• Philips head screwdriver
• Flat blade screwdriver

Let's Get Started

Check Operation

Before adjusting the window sashes, you will want to determine if the window sash's glides should be adjusted.

1. Open the operating window sash, the window that opens first, by about 1 inch.
2. Check to make sure the gap between the window sash and side jamb, or the side of the window frame, is the same at the top and the bottom of the window.
   • If the gap between the window sash and the window frame looks crooked, proceed to the next steps to adjust your gliding window sash.

Adjust Your Gliding Window Sash

If the gap between the window sash and the side of the frame is uneven, you will want to adjust one of the glides up or down so the window sash will sit square in the frame.

1. Remove the operating window sash following steps one (1) through two (2) on Page 2 in the (Pre-1992) Perma-Shield® Gliding Window Sash Replacement Guide (9034246).
2. Inspect the bottom of the window sash and look for two glides, which are small, screw-like parts.
   • Note: Only the head of the glides will be visible.
3. Use a flat blade screwdriver to turn the glide that needs adjustment by 180 degrees, or one half turn, counterclockwise or clockwise.
   • Note: A counterclockwise turn will shift the window sash up, and a clockwise turn will shift the window sash down.
4. Reverse steps one (1) and two (2) on Page 2 in the (Pre-1992) Perma-Shield® Gliding Window Sash Replacement Guide (9034246) to reinstall the window sash, including retracting the head stop, or top of the window frame, to secure the window sash.
5. Follow steps one (1) and two (2) under Check Operation (see above), to see if the window is still crooked.
6. If the window is still crooked, we recommend you adjust the glides again.

Need Parts?

If you noticed your glides were worn or damaged when you inspected them or you're still having trouble with a crooked window, Contact Andersen® Windows and Doors for assistance.

Related Articles

If your gliding window was manufactured after 1992 and you believe you need to make adjustments to your window sash, see either Sash Adjustments for 400 Series Gliding Window (1991- Present) or Sash Adjustments for 100 Series Gliding Windows (2008 - Present).

If you also noticed that outside air is coming in through your window, see Air Infiltration in Gliding Windows.

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