How Do I Install Top and Bottom Extensions on the Mesh Patio Pet Door?

Short Answer

Top extensions slide into the top of the pet door and are secured with screws, while bottom extensions attach to the base to raise the flap height. The top extension can be tight to fit, so correct alignment is important.

Before You Start

• Place the pet door on a flat surface
• Make sure all parts are aligned before tightening screws
• Do not fully tighten screws until everything is correctly positioned

Installation guides and videos are available on the product page under the Installation section

Installing Top Extensions (Adds Height)

Top extensions are used to increase the overall height of the pet door to fit taller sliding doors.

Steps:

1. Lay the pet door flat with the locking latches facing up
2. Loosen the two screws at the top of the frame (do not remove them)
3. Align the extension with the top channel of the frame
4. Carefully slide the extension into place
5. Insert and tighten the provided screws
6. Re-tighten the top frame screws to secure everything

Common Issues with Top Extensions

This is the step where most customers get stuck.

• The extension may feel tight or difficult to slide in - this is normal
• If it won’t slide in:
  • Check the extension is perfectly aligned with the channel
  • Make sure the top screws are loosened enough
  • Try sliding from both sides evenly

Do not force the extension if it feels misaligned.

Installing Bottom Extensions (Raises Flap Height)

Bottom extensions raise the height of the flap, making it easier for larger pets to use.

Steps:

1. Position the extension at the bottom of the pet door
2. Slide it into place
3. Secure using the provided screws

Important Considerations

• Top extensions increase overall door height
• Bottom extensions raise the flap entry height
• Always check your final height before installing

Because door sizes vary, customers should always measure their space before installing extensions.

Helpful Tip

If the top extension isn’t sliding in easily, it’s usually an alignment issue - not a defect. Taking a moment to realign the channel typically resolves it.

Related Articles

• How Do I Measure My Sliding Door for a Patio Pet Door?

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