Short Answer
Remove the two screws at the top of the panel, then slide the top section out. This reduces the overall height by 30 mm (1.18 inches).
When Should I Remove the Top Panel?
You may need to remove the top panel if:
Your sliding door height is slightly too small
You need a little extra clearance for installation
The installation manual confirms this adjustment can help when the unit is just above the required height.
How to Remove the Top Panel
Step 1: Remove the Screws
Use a screwdriver to remove the two screws at the top of the panel.
Step 2: Slide the Panel Out
Slide the top panel out of the frame.
The panel may feel tight — this is normal.
What Happens After Removal?
The overall height is reduced by 30 mm (1.18 inches)
This can help the pet door fit into tighter door openings

Important Considerations
You can only remove the top panel from one section (either the door or the extension, not both)
A Top Extension cannot be used if the top panel has been removed from the main door
Always check your measurements before removing parts
Because sliding door openings vary between homes, customers should always measure their space and confirm compatibility before installing.
Helpful Tip
If your measurement is only slightly over the maximum height, removing the top panel is often enough to make the pet door fit.
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Keywords
remove top panel patio pet door, glass patio pet door height adjustment, patio pet door too tall, sliding door pet door fit adjustment, pet door top section removal
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