How to Repair a Popped Out Window Sash on a Double Hung Vinyl Window

January 28, 2018

Have you ever experienced a popped out window sash on your double hung vinyl windows? Perhaps you were performing your spring cleaning and you swung the lower sash inward to clean the outside of the glass. It’s likely that you positioned the sash too low in the side rail, and then you inadvertently raised one side higher than the other. The next thing you knew you were staring at a popped out window sash and scratching your head trying to figure out how to put the sash back in place.

The last thing you want to do is to try and force the popped out window sash back in place while the shoe is in the lower position. I came across this short video on how to repair a popped out window sash with ease. Follow these three easy steps to repair your window without damaging the components.

Video: Repairing a Popped Out Window Sash


Step 1: The first step is to remove the lower sash from the window casing. Raise the lower sash about 4 or 5 inches from the window sill or stool. Tilt the top of the sash towards you then pull up on the right side to remove the sash from the shoe. This is somewhat of a twisting action in that you are rotating the window counter clockwise. You will see what I mean when you watch the video above. Carefully set the window on the ground and lean it against the wall out of harms way.

Step 2: Use a large flat head screw driver to raise the balance system or shoe. Insert the screwdriver into the slot where the pin on lower sash would normally rest. Gently twist the screwdriver and raise the shoe so it is about 4 or 5 inches above the window sill. Repeat this step for the shoe or balance mechanism on the opposite side of the window so that both shoes are at the same height.

Step 3: Reinsert the lower window sash. With the window lying flat, insert the pins into the balance mechanism. With the right side slightly higher than the left, insert the left pin first. Then lower the right side of the sash, to insert the right-hand pin. Check that the window sash moves up and down freely. Then slide it down to the closed position and engage the sash locks.

Quick Tip

The next time you clean your windows. Make sure the lower sash is 4 or 5 inches above the window sill before attempting to swing the top inwards. When swinging the lower sash back in place make sure the two shoes are at the same height or you might just find yourself back in the same position you started in, with a popped out window sash in your hands.

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Are you having a hard time putting a popped out window sash back in place? Contact our support team at (815)-634-8922.