• Custom built to fit your horizontal sliding windows
  • Features clear safety glass and weather-resistant flaps to maintain comfortable indoor temperatures year-round.
  • Quick setup with a spring-loaded mechanism that requires no permanent modifications—ideal for both renters and homeowners.
  • Available in robust aluminum or vinyl with a sturdy locking cover for enhanced security.

Liberty Custom Cat Door for Horizontal Sliding Windows

Custom Height Window Access With Zero Drilling

Regular price $589.99

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Color: White
Frame Type
Height Adjustment Range


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Tailored precisely to your window measurements, this tool-free insert combines clear safety glass with a gentle magnetic flap to grant your cat instant freedom without permanent window modifications.

  • Custom built to fit your horizontal sliding windows
  • Features clear safety glass and weather-resistant flaps to maintain comfortable indoor temperatures year-round.
  • Quick setup with a spring-loaded mechanism that requires no permanent modifications—ideal for both renters and homeowners.
  • Available in robust aluminum or vinyl with a sturdy locking cover for enhanced security.

Installation & Fit

  • Custom engineered to your exact window opening height with up to 3-1/2" of spring-loaded adjustment for a draft-free seal.
  • Requires horizontal sliding window tracks measuring at least 1" wide for aluminum frames or 1-1/2" wide for vinyl frames.
  • Constructed with heavy-duty extruded aluminum or vinyl framing and single-pane safety glass for weather sealing.
  • Includes a slide-in locking cover to secure the opening and regulate pet access.
  • Tool-free DIY installation slides directly into existing tracks in minutes with zero drilling or permanent window modifications.

Best Suited For

Ideal for:

  • Non-standard horizontal sliding window heights requiring a tailored, made-to-measure fit with built-in spring tension adjustment.
  • Renters and homeowners seeking a tool-free, spring-loaded installation that installs instantly with zero drilling or permanent window modifications.
  • Cats and small, timid pets who benefit from a lightweight flexible flap and gentle magnetic tension for effortless access.
  • Horizontal sliding window tracks made of aluminum (at least 1" wide) or vinyl (at least 1-1/2" wide).

Not ideal for:

Questions

What prevents cold air from entering through the pet door?

The door is designed with robust magnetic closures and weatherstripping to prevent drafts, creating an efficient barrier against cold air.

Can you lock the pet door?

It comes with a latched closing cover, and you slide that in on the inside of the house.

Does it lock?

We do include a c-clamp lock. It is not designed to mate with your existing sliding door lock. You can also use a Charley-Bar or dowel in the track.

Explore all questions
Product Details

Product Details


The Liberty Custom Cat Door for Horizontal Sliding Windows offers a custom-fit, non-permanent pet opening designed specifically for horizontal sliding window tracks. Built with single-pane safety glass and weather-sealed flap technology, it provides effortless outdoor access for your cat without compromising home insulation or security.

Custom Built for Horizontal Windows
Tailored precisely to your window opening dimensions, this panel installs cleanly without requiring permanent structural alterations. The integrated spring-loaded mechanism ensures a tight, draft-free seal that is simple to install and remove.

Energy-Efficient Safety Glass
Equipped with durable single-pane safety glass and flexible weather-resistant flaps, the panel preserves clear views and natural light while minimizing heat transfer and outdoor drafts.

Aluminum & Vinyl Frame Options
Choose between heavy-duty extruded aluminum or flexible vinyl frames to match your window tracks. Aluminum frames fit sliding tracks at least 1" wide, while vinyl frames fit tracks at least 1-1/2" wide.

Integrated Locking Cover
Each panel includes a sturdy locking cover that slides over the flap, giving you complete control over pet access and added peace of mind when keeping your cat indoors.

Size icon Sizing & Fit

Size Chart

Flap Dimensions:

7"w x 8"h

The entry way your dog goes through.

Overall Panel Width

10 3/16"

How wide your panel is.

Flap dimensions
Panel width
Step over height

Step-Over Height

3" - 5"

The distance from the bottom of the panel to the bottom of your flap.

Flap Size Flap Dimension Step Over Range Outside Frame Dimension Recommended Pet Height
Cat Flap 7"w x 8"h 3" - 5" 10 3/16" 9" - 13"

Do not know which size to get? Here is a measurement guide to help you out.

Aluminum panel has 1" framing, measure your track width to make sure that your window will accommodate the panel.

If your measured track height does not fall within one of the ranges above, we can make a custom height. Custom height option may take up to 4 weeks to special order the glass and build the panel. If your measured track height is near the bottom of the adjustment range then you should review A Note of Caution.

FAQs

FAQ

Reviews

Customer Reviews

Request Freight Quote

Track heights exceeding 106 inches (107" or higher) may require additional shipping charges. Please provide your contact information for a custom freight quote, and our team will follow up during normal business hours.