Endura Flap Custom Cat Door for Horizontal Sliding Windows
- Custom-fit Endura Flap Cat Door for horizontal sliding windows
- Durable aluminum or vinyl frame with 3/16" clear safety glass, which is 59% thicker than the standard for enhanced durability and increased energy efficiency
- Easy installation, perfect for renters with no permanent alterations needed
- Comes with C-clamp lock, draft stopper, and weather stripping for security and insulation
- Flap remains flexible in -40°F temperatures and stays sealed in 50mph winds
Product Details
Sizing & Fit
Installation Guide
FAQs
ReviewsProduct Details
The Custom Endura Flap Cat Door for Horizontal Sliding Windows offers a practical solution for your pets to enter and exit as they please. This custom-fit cat door is specifically designed to fit seamlessly into your horizontal sliding window track, ensuring a secure and snug installation without any permanent alterations—making it perfect for renters.
Constructed with a durable aluminum or vinyl frame and featuring safety glass, this cat door provides improved energy efficiency while allowing sunlight inside. For smaller height ranges, the panel may be all metal instead of glass. The flap is lined with adjustable magnets to resist heavy winds and extreme temperatures, remaining flexible even in -40°F conditions and staying sealed in winds up to 50mph.
Installation is a breeze with the spring-loaded design, and the removable panel comes with a C-clamp lock, draft stopper, and weather stripping for added security and insulation. The cat door is available in three stylish finishes: white, bronze, and brushed aluminum, allowing you to match your window frame effortlessly.
The panels have a 3" spring-loaded height adjustment, so if you have a 48" track, for example, the panel you choose will adjust from 46" – 49" inches.
Not only will this cat door provide your pets with newfound freedom, but it will also enhance your home's overall aesthetic.
Features:
- Aluminum or vinyl frame designed to fit into a window track width of at least 1" thick
- Spring-loaded design ensures secure and easy installation
- Adjustable magnets for heavy wind and temperature resistance
- Removable panel with built-in cat door for flexibility and convenience
- Sturdy locking cover keeps pets inside when needed
- Available in white, bronze, or brushed aluminum to match your window frame
- Comes with a C-clamp lock, draft stopper, and weather stripping for security and insulation
Benefits:
- Easy to install and doesn't require semi-permanent installation
- Removable panel benefits all owners, especially renters.
- Don't need to make any permanent alterations to your window
- Available in white, bronze, or brushed aluminum to match your window frame
- Pets can enter and exit as they please
- Made with durable, long-lasting materials
Size Chart
Flap Dimensions:
6"w x 11"h
The entry way your dog goes through.Overall Panel Width
11 1/4"
How wide your panel is.
Step-Over Height
3”
The distance from the bottom of the panel to the bottom of your flap.| Flap Size | Flap Dimension | Step Over | Overall Panel Width | Recommended Pet Height |
|---|---|---|---|---|
| Small | 6" w x 11" h | 3" | 11 1/4" | 9" - 15" |
Track Height Adjustment Range is the measurement of your window height from the lowest point of your track to the highest point. Review our Track Measuring Guide for more information.
Choose the range that your track height falls into and when ordered you will be asked to give the exact height of your slider track inside very top to very bottom. In each case you will have 3" of height adjustment with the height you specify approximately in the middle of that range. Custom height option may take up to 4 weeks to special order the glass and build the panel. The ranges are:
Between 23"– 34"
Between 37"– 46"
Over 49"
CAUTION: If your measured track height is near the bottom of the adjustment range then you should review A Note of Caution.
Not sure if this is the correct flap size? 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. Vinyl panels have a 1-1/4" framing.
Find The Best Pet Door Size For My Pet
A
Pet Height: inches
B
Pet Width: inches
Installation Instructions
Difficulty
Easy
Steps
04
Time Required
0.5 hours
Sections
02
Flags
02
Parts
- Horizontal Window Pet Door
- Foam Weather Strip
- Center Post Weather Seal Draft Stopper
- Horizontal Window Clamp Lock
- Screwdriver
Tools
- Scissors
- Flathead Screwdriver
Please read instructions & notes thoroughly before installation.
Step 1 Release Spring Mechanism
- Loosen the height adjustment locks at the top of the pet panel with a screwdriver. This allows the spring mechanism to move freely up and down.
Step 2 Check Panel Fit
- To insert the panel into the top track, push up against the spring mechanism and swing the bottom of the panel up and over the threshold. Seat the panel on top of the small guide rail in the track.
Step 3 Apply Weather-stripping
- Once you’re sure the panel fits, remove it from the frame and lay it on its side on the ground.
- Apply the foam weather-stripping by peeling back the paper and exposing the adhesive. Unroll it along the edge of the panel, pressing to ensure it adheres. Install on both sides, trim to fit with scissors.
Step 4 Install Center Post Weather Seal
- The center post weather seal strip (draft stopper) should be installed on the inside of the home. It can be installed on either the back edge of the sliding window panel (Figure A) or the leading edge of the stationary panel (Figure B).
- Place the panel back into the window, then tighten the height adjustment locks to lock it in place. Installation complete!
LOCK DETAILS
Since you likely can no longer use your window’s original lock, we have provided you with an alternative locking method to keep your home secure.
Installing the window clamp: This clamp has a screw that tightens by hand to prevent the sliding door from moving beyond the clamp’s placement. For doors manufactured with the glass slider on the inside track, the lock can usually be installed on the door’s raised track.
If you aren’t able to use the lock that comes with the panel: A great alternative to locking your sliding glass door is a Charley bar or dowel in the track. Both work off the same concept - they block the slider from opening. When engaged you cannot pull the sliding door away from the pet door panel.
Videos
How to Adjust the Magnet Strength on an Endura Flap
FAQ
|
How easy is this to install? The spring loaded design makes installation of the cat door panel very easy. Once it is in place you can't remove it from the outside either, so it's safe and secure. |
|
How do I measure to make sure that it fits? You will need to open the window and measure from the deepest down inside the bottom of the track and all the way up into the track at the top. You will also need to measure how wide the track is, since the panel is 1" thick your track has to have at least that width to be able to accommodate it. |
|
How strong is the seal on the pet door flap? The magnets are stronger than your typical off the shelf pet door, so they will have to push the flap a bit harder to get it open. You can adjust the magnets in the beginning for training purposes by reducing their strengths, however you will lose some of the sealing power. |
|
Is this just for cats? Small dogs can also use the flap, as long as they can comfortably make it through a 6"w by 11"h opening. |
|
Does this keep out drafts? The flap seals extremely well so it is great if you are looking for energy efficiency. |
|
How much does shipping cost? Shipping is calculated at checkout. |
Warranty
Warranty Type: Lifetime
Duration: Lifetime of the product.
Coverage: Defects in materials and workmanship under standard regular use.
Exclusions:
Damage caused by misuse or not using the product as intended.
Improper installation.
Damage caused by chewing.
Customer Reviews
Size Chart
Flap Dimensions:
6"w x 11"h
The entry way your dog goes through.Overall Panel Width
11 1/4"
How wide your panel is. Step-Over Height
3”
The distance from the bottom of the panel to the bottom of your flap.| Flap Size | Flap Dimension | Step Over | Overall Panel Width | Recommended Pet Height |
|---|---|---|---|---|
| Small | 6" w x 11" h | 3" | 11 1/4" | 9" - 15" |
Track Height Adjustment Range is the measurement of your window height from the lowest point of your track to the highest point. Review our Track Measuring Guide for more information.
Choose the range that your track height falls into and when ordered you will be asked to give the exact height of your slider track inside very top to very bottom. In each case you will have 3" of height adjustment with the height you specify approximately in the middle of that range. Custom height option may take up to 4 weeks to special order the glass and build the panel. The ranges are:
Between 23"– 34"
Between 37"– 46"
Over 49"
CAUTION: If your measured track height is near the bottom of the adjustment range then you should review A Note of Caution.
Not sure if this is the correct flap size? 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. Vinyl panels have a 1-1/4" framing.
Find The Best Pet Door Size For My Pet
A
Pet Height: inches
B
Pet Width: inches
Installation Instructions
Difficulty
Easy
Steps
04
Time Required
0.5 hours
Sections
02
Flags
02
Parts
- Horizontal Window Pet Door
- Foam Weather Strip
- Center Post Weather Seal Draft Stopper
- Horizontal Window Clamp Lock
- Screwdriver
Tools
- Scissors
- Flathead Screwdriver
Please read instructions & notes thoroughly before installation.
Step 1 Release Spring Mechanism
- Loosen the height adjustment locks at the top of the pet panel with a screwdriver. This allows the spring mechanism to move freely up and down.
Step 2 Check Panel Fit
- To insert the panel into the top track, push up against the spring mechanism and swing the bottom of the panel up and over the threshold. Seat the panel on top of the small guide rail in the track.
Step 3 Apply Weather-stripping
- Once you’re sure the panel fits, remove it from the frame and lay it on its side on the ground.
- Apply the foam weather-stripping by peeling back the paper and exposing the adhesive. Unroll it along the edge of the panel, pressing to ensure it adheres. Install on both sides, trim to fit with scissors.
Step 4 Install Center Post Weather Seal
- The center post weather seal strip (draft stopper) should be installed on the inside of the home. It can be installed on either the back edge of the sliding window panel (Figure A) or the leading edge of the stationary panel (Figure B).
- Place the panel back into the window, then tighten the height adjustment locks to lock it in place. Installation complete!
LOCK DETAILS
Since you likely can no longer use your window’s original lock, we have provided you with an alternative locking method to keep your home secure.
Installing the window clamp: This clamp has a screw that tightens by hand to prevent the sliding door from moving beyond the clamp’s placement. For doors manufactured with the glass slider on the inside track, the lock can usually be installed on the door’s raised track.
If you aren’t able to use the lock that comes with the panel: A great alternative to locking your sliding glass door is a Charley bar or dowel in the track. Both work off the same concept - they block the slider from opening. When engaged you cannot pull the sliding door away from the pet door panel.
Videos
How to Adjust the Magnet Strength on an Endura Flap
FAQ
|
How easy is this to install? The spring loaded design makes installation of the cat door panel very easy. Once it is in place you can't remove it from the outside either, so it's safe and secure. |
|
How do I measure to make sure that it fits? You will need to open the window and measure from the deepest down inside the bottom of the track and all the way up into the track at the top. You will also need to measure how wide the track is, since the panel is 1" thick your track has to have at least that width to be able to accommodate it. |
|
How strong is the seal on the pet door flap? The magnets are stronger than your typical off the shelf pet door, so they will have to push the flap a bit harder to get it open. You can adjust the magnets in the beginning for training purposes by reducing their strengths, however you will lose some of the sealing power. |
|
Is this just for cats? Small dogs can also use the flap, as long as they can comfortably make it through a 6"w by 11"h opening. |
|
Does this keep out drafts? The flap seals extremely well so it is great if you are looking for energy efficiency. |
|
How much does shipping cost? Shipping is calculated at checkout. |
Warranty
Warranty Type: Lifetime
Duration: Lifetime of the product.
Coverage: Defects in materials and workmanship under standard regular use.
Exclusions:
Damage caused by misuse or not using the product as intended.
Improper installation.
Damage caused by chewing.
