Free U.S. Shipping & Lifetime Warranty For All Endura Flap Pet Doors

Endura Flap Cat Door for Horizontal Sliding Windows

Endura Flap Cat Door for Horizontal Sliding Windows

Regular price
$359.99
Sale price
$359.99
Unit price
per 
White
Dark Bronze/Black
Brushed Aluminum

How to Measure This field is required.

  • Durable aluminum and vinyl frames with heavy-duty, weather-resistant flaps
  • 3/16" clear safety glass offers a clear view and lets in sunlight
  • Quick, tool-free installation ideal for renters and homeowners
  • Adjustable panel height (34" - 37") and custom options available

Custom Order | Ships in 3-5 Weeks | Non-Returnable

Great for Harsh Climates Great for Harsh Climates
Cats Love it Cats Love it
Installs in Five Minutes Installs in Five Minutes

Product Details


  • Seamless integration: Removable panel with built-in cat door fits into horizontal sliding window tracks
  • Sturdy construction: Aluminum and vinyl frames and weather-resistant flaps designed to withstand extreme conditions. You can also find the Endura Flap Cat Door for Windows in vinyl as well. 
  • Energy efficiency: 3/16" clear safety glass enhances insulation, prevents drafts, and allows natural light to enter
  • Hassle-free installation: Spring-loaded design ensures easy, secure installation without permanent alterations
  • Security features: Comes with a C-clamp lockdraft stopper, and weather stripping for added protection
  • Adaptable dimensions: The aluminum frame fits horizontal sliding windows with 1" track width and the vinyl frame fits 1-1/4" tracks; and offers custom size options
  • Locking cover included: Prevent pets from leaving the house when desired
  • Accommodates small dogs: Cat door opening (6"W x 11"H) is also suitable for small dogs that can fit comfortably
  • Satisfied customers: Many have praised the product for its quality materials, easy installation, and effectiveness against drafts
  • Versatile color options: Available in white, bronze, or brushed aluminum to match your window frame

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.
flap dimensions
epanel width
step over height

Step-Over Height

3”

The distance from the bottom of the panel to the bottom of your flap.
Flap SizeFlap DimensionStep OverOverall Panel WidthRecommended Pet Height
Small6" w x 11" h3"11 1/4"9" - 15"

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

calculator.jpg

A

Pet Height: inches

B

Pet Width: inches

Please fill the above fields.

Additional Information

Flap Material

Flexible

Your Maximum Pet Size

Cats, Large Cats

Climate Suitability

Severe 4-Season

Type of Window

Sideways Sliding

Sealing Value

Very High

Wind Resistance

Very High

Installation Instructions

Installation icon Printable Version
Installation icon Difficulty Easy
Installation icon Steps 04
Installation icon Time Required 0.5 hours
Installation icon Sections 02
Installation icon Flags 02

Parts

  • 1 Horizontal Window Pet Door
  • 1 Foam Weather Strip
  • 1 Center Post Weather Seal Draft Stopper
  • 1 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 the screwdriver. This allows the spring mechanism to move freely up and down.

Step 2 Check Panel Fit

insert panel into track
  • 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.
  • You want to put the pet door in your track before applying any weather-stripping to ensure it fits.
  • If the panel fits well, proceed to the next step. See the FAQs if you have trouble.

Step 3 Apply Weather-stripping

apply weather stripping to panel
  • 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

apply center post weather seal fig a
apply center post weather seal fig a
apply center post weather seal fig b
  • 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).
  • This strip prevents air from leaking between the sliding window and the stationary panel. Trim with scissors as needed.
  • Clean the edge of your window with rubbing alcohol before installing to assure a good seal.
  • Place the panel back into the window, then tighten the height adjustment locks to lock it in place. Installation complete!

Videos

How to Measure Your Window for a Sliding Window Pet Door


How to Adjust the Magnet Strength on an Endura Flap

FAQ

Will this keep out drafts?

This panel has clear safety glass and the flap seals extremely well so it is great if you are looking for energy efficiency.

How do I measure my window to make sure that the panel 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
  • how wide the track is (must be at least 1” thick to accommodate panel)

 

How easy is it to install?

This cat door panel is very easy to install due to its spring-loaded design. Simply loosen the screws with a flathead screwdriver, pop the door into the track, and re-tighten them. 

Is this door 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. Make sure to measure your pet before buying.

What do I do if none of these pet door sizes fit my window?

You can get a custom cat door if none of the pet door sizes fit your window.

Warranty

Endura Flap products have a lifetime warranty against defects in materials and workmanship under standard regular use. Endura Flap® Pet Doors Are 100% Designed, Engineered, and Manufactured in the USA. They are handmade for quality work in San Luis Obispo, California. 

We will replace any defective parts at no cost to you. Defective parts may include incorrectly sized flaps, bent or dented frames, or improperly fitted parts.

Customers living outside of the continental United States are responsible for shipping costs as well as duties and taxes (if applicable) for any replacement parts or services covered under the warranty policy regardless of the replacement part or service's original cost.  

Important Note:

Endura Flap® pet doors have a lifetime warranty for normal wear & tear and manufacturing defects (dog-chewing is not covered).

Damage caused by not using the product as intended, improper installation, and chewing is not covered under this warranty.

Endura Flap Pet Doors used in a commercial application like a Kennel or Boarding facility have a three year warranty.

Customer Reviews

Customer Reviews
4.4 Based on 7 Reviews
5 ★
71% 
5
4 ★
0% 
0
3 ★
29% 
2
2 ★
0% 
0
1 ★
0% 
0
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
JH
10/03/2023
Joseph H.

Custom order. Fits great

Order a custom size and it fits and works great. One cat can’t get enough and the other still thinks his brother is teleporting to the other side of the window.

E
02/09/2023
Elizabeth

Excellent Choice for Windows (Staff Review)

This panel is an excellent choice for installing a cat door in your window. Highly insulating flap and comes with weatherstripping to prevent any drafts.

JB
08/17/2022
Jason B.

Great quality, one door to rule them all

Hesitated purchasing this and spent years with a mediocre plastic door from a big box store, finally pulled the trigger and am more than satisfied with the quality construction of this and the ease of installation. Only regret is I didn’t buy sooner.

NM
06/03/2022
Norma M.
United States United States

Happy Cats

Got our special order window within 3-4 weeks as stated on website & in excellent condition. We got it installed in our daughter's window with no problems or issues. The door is well made, quality materials & looks great too. It's the entrance to her newly completed catio. Very happy with your product - worth it to get a quality product that will last for many years. Cats are very happy too (:-))

LS
04/04/2022
Lesley S.
United States United States

Buy tape, too

This didn’t seal properly and we had to tape it to prevent drafts. Also, the cat hasn’t been able to learn how to use it; we have to prop it open for him. So basically all we’re getting out if this $300 purchase is higher utility bills. I would probably endorse it despite the drafts if the cat would just use it. You might have better luck. So, go for it, just buy tape, too.

Endura Flap Cat Door for Horizontal Sliding Windows

White / Aluminum / 34" - 37" Edit

Endura cat door for horizontal sliding windows

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.
flap dimensions
epanel width
step over height

Step-Over Height

3”

The distance from the bottom of the panel to the bottom of your flap.
Flap SizeFlap DimensionStep OverOverall Panel WidthRecommended Pet Height
Small6" w x 11" h3"11 1/4"9" - 15"

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

calculator.jpg

A

Pet Height: inches

B

Pet Width: inches

Please fill the above fields.

Flap Material

Flexible

Your Maximum Pet Size

Cats, Large Cats

Climate Suitability

Severe 4-Season

Type of Window

Sideways Sliding

Sealing Value

Very High

Wind Resistance

Very High

Installation Instructions

Installation icon Printable Version
Installation icon Difficulty Easy
Installation icon Steps 04
Installation icon Time Required 0.5 hours
Installation icon Sections 02
Installation icon Flags 02

Parts

  • 1 Horizontal Window Pet Door
  • 1 Foam Weather Strip
  • 1 Center Post Weather Seal Draft Stopper
  • 1 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 the screwdriver. This allows the spring mechanism to move freely up and down.

Step 2 Check Panel Fit

insert panel into track
  • 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.
  • You want to put the pet door in your track before applying any weather-stripping to ensure it fits.
  • If the panel fits well, proceed to the next step. See the FAQs if you have trouble.

Step 3 Apply Weather-stripping

apply weather stripping to panel
  • 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

apply center post weather seal fig a
apply center post weather seal fig a
apply center post weather seal fig b
  • 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).
  • This strip prevents air from leaking between the sliding window and the stationary panel. Trim with scissors as needed.
  • Clean the edge of your window with rubbing alcohol before installing to assure a good seal.
  • Place the panel back into the window, then tighten the height adjustment locks to lock it in place. Installation complete!

Videos

How to Measure Your Window for a Sliding Window Pet Door


How to Adjust the Magnet Strength on an Endura Flap

FAQ

Will this keep out drafts?

This panel has clear safety glass and the flap seals extremely well so it is great if you are looking for energy efficiency.

How do I measure my window to make sure that the panel 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
  • how wide the track is (must be at least 1” thick to accommodate panel)

 

How easy is it to install?

This cat door panel is very easy to install due to its spring-loaded design. Simply loosen the screws with a flathead screwdriver, pop the door into the track, and re-tighten them. 

Is this door 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. Make sure to measure your pet before buying.

What do I do if none of these pet door sizes fit my window?

You can get a custom cat door if none of the pet door sizes fit your window.

Warranty

Endura Flap products have a lifetime warranty against defects in materials and workmanship under standard regular use. Endura Flap® Pet Doors Are 100% Designed, Engineered, and Manufactured in the USA. They are handmade for quality work in San Luis Obispo, California. 

We will replace any defective parts at no cost to you. Defective parts may include incorrectly sized flaps, bent or dented frames, or improperly fitted parts.

Customers living outside of the continental United States are responsible for shipping costs as well as duties and taxes (if applicable) for any replacement parts or services covered under the warranty policy regardless of the replacement part or service's original cost.  

Important Note:

Endura Flap® pet doors have a lifetime warranty for normal wear & tear and manufacturing defects (dog-chewing is not covered).

Damage caused by not using the product as intended, improper installation, and chewing is not covered under this warranty.

Endura Flap Pet Doors used in a commercial application like a Kennel or Boarding facility have a three year warranty.

Customer Reviews

Customer Reviews
4.4 Based on 7 Reviews
5 ★
71% 
5
4 ★
0% 
0
3 ★
29% 
2
2 ★
0% 
0
1 ★
0% 
0
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
JH
10/03/2023
Joseph H.

Custom order. Fits great

Order a custom size and it fits and works great. One cat can’t get enough and the other still thinks his brother is teleporting to the other side of the window.

E
02/09/2023
Elizabeth

Excellent Choice for Windows (Staff Review)

This panel is an excellent choice for installing a cat door in your window. Highly insulating flap and comes with weatherstripping to prevent any drafts.

JB
08/17/2022
Jason B.

Great quality, one door to rule them all

Hesitated purchasing this and spent years with a mediocre plastic door from a big box store, finally pulled the trigger and am more than satisfied with the quality construction of this and the ease of installation. Only regret is I didn’t buy sooner.

NM
06/03/2022
Norma M.
United States United States

Happy Cats

Got our special order window within 3-4 weeks as stated on website & in excellent condition. We got it installed in our daughter's window with no problems or issues. The door is well made, quality materials & looks great too. It's the entrance to her newly completed catio. Very happy with your product - worth it to get a quality product that will last for many years. Cats are very happy too (:-))

LS
04/04/2022
Lesley S.
United States United States

Buy tape, too

This didn’t seal properly and we had to tape it to prevent drafts. Also, the cat hasn’t been able to learn how to use it; we have to prop it open for him. So basically all we’re getting out if this $300 purchase is higher utility bills. I would probably endorse it despite the drafts if the cat would just use it. You might have better luck. So, go for it, just buy tape, too.

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