Endura Flap Wall Mount Pet Door: Insulating Double Flaps for Year-Round Comfort

Endura Flap Wall Mount Pet Door for Thick Walls

Small / Single / White Choose Options

Product Details

Built for homes where wall depth is the deciding factor, this model delivers a clean in wall pet entry when a standard tunnel range is not enough, while keeping the opening more protected for everyday comfort.

Made for deeper wall construction
The extra long telescoping aluminum tunnel is sized specifically for thicker wall builds, so the door can span the full depth without relying on a separately fabricated tunnel section. The result is a more consistent fit through the wall and a cleaner finished appearance from inside to outside.

Comfort in demanding weather
Endura Flap sealing is built around a flexible flap and a magnetic edge that helps the door stay closed when conditions are active. For buyers dealing with wind or temperature swings, that tighter close reduces the open feeling many basic flaps can create.

Options that match life's demands
Single and double flap configurations let you choose the balance that fits your climate and your pet’s comfort level. A locking cover is included to close the opening when you want the door secured, and the aluminum frame is offered in black or white to better match common trim and exterior palettes.

Made for the long haul
Made in the USA and backed by a lifetime warranty, this is a wall pet door built for pet owners who want a durable, permanent-feeling solution they can rely on for years.

Sizing & Fit

Size Chart

Small Double Flap: 6"w x 10"h
Medium Double Flap: 8"w x 14"h
Large Double Flap: 10"w x 18"h
Extra Large Double Flap: 12"w x 22"h
XX Large Double Flap: 14"w x 26"h

Flap Dimensions:

Double Flap:6"w x 10"h

The entry way your dog goes through.

Outside Frame Dimensions

10 1/8"w x 16 3/4"h

The outer edge of the pet door.

Rough Cut Out:

8 5/8" w x 15" h

The size of the hole needed to fit your pet door into your wall.

Flap Dimensions:

Double Flap:8"w x 14"h

The entry way your dog goes through.

Outside Frame Dimensions

12 3/16"w x 20 3/4"h

The outer edge of the pet door.

Rough Cut Out:

10 3/8" w x 19" h

The size of the hole needed to fit your pet door into your wall.

Flap Dimensions:

Double Flap:10"w x 18"h

The entry way your dog goes through.

Outside Frame Dimensions

14 3/16"w x 24 3/4"h

The outer edge of the pet door.

Rough Cut Out:

12 1/2" w x 23 1/16" h

The size of the hole needed to fit your pet door into your wall.

Flap Dimensions:

Double Flap:12"w x 22"h

The entry way your dog goes through.

Outside Frame Dimensions

16 1/4"w x 28 7/8"h

The outer edge of the pet door.

Rough Cut Out:

14 11/16" w x 27 1/16" h

The size of the hole needed to fit your pet door into your wall.

Flap Dimensions:

Double Flap:14"w x 26"h

The entry way your dog goes through.

Outside Frame Dimensions

18 1/4"w x 32 7/8"h

The outer edge of the pet door.

Rough Cut Out:

16 13/16" w x 31 3/16" h

The size of the hole needed to fit your pet door into your wall.

Flap Size	Flap Dimension	Rough Cut Out	Outside Frame Dimension	Recommended Pet Height
Small	6" w x 10" h	8 5/8" w x 15" h	10 1/8" w x 16 3/4" h	8" - 14"
Medium	8" w x 14" h	10 3/8" w x 19" h	12 3/16" w x 20 3/4" h	8" - 21"
Large	10" w x 18" h	12 1/2" w x 23 1/16" h	14 3/16" w x 24 3/4"	8" - 27"
Extra Large	12" w x 22" h	14 11/16" w x 27 1/16" h	16 1/4" w x 28 7/8" h	8" - 34"
XX Large	14" w x 26" h	16 13/16" w x 31 3/16" h	18 1/4" w x 32 7/8" h	8" - 42"

Single flap or double flap? This is the double flap version. The double flap will provide more insulation for your home, perfect for extreme climates. With a double-flap system, there is a flap on each side of the tunnel and dead air space in between to add extra insulation.

Note: Endura Flap pet doors are not recommended for use by kittens or very small dogs. Cats have been successful using Small; however, a few have found the Medium difficult to use. We would not recommend using the Large or Extra Large or any of the double flap versions for cats.

Installation Guide

Installation Information

Double Flap Wall Mount Instructions

Printable Version

Difficulty High

Steps 11

Time Required 2 hours

Parts

Inner frame with tunnel
Outer frame with tunnel
Locking cover
Inner wall template
Caulking
Sheet metal screws
Outer wall transfer template with level and pencil

Tools

Measuring tape
Electric drill/driver (philips head and drill bit for outer wall)
Safety gear
Stud finder
Drywall knife (or other tool for cutting the inside wall)
Saw (for the outside wall, pick one that works with your wall material)
Caulking gun
Clamp (or an extra set of hands!)

Take a few minutes to read these instructions from start to finish— it’s worth it! If the thought of cutting a hole in your house makes your palms sweaty, no shame in bringing in a pro to handle it!

Step 1 Measure Your Pet

First up, measure your pet and mark the wall 3 inches above their height—it’s the sweet spot for lining up the template.
Don’t want to cut into the baseboards? If needed, adjust the height of the pet door so you don’t have to cut them. Short-legged or mobility-limited pets may need a step added if you have taller baseboards. Consider how high your pet will need to step from both inside and outside the pet door, while still allowing clearance above their back.

Step 2 Prepare Wall for Installation

Find a wall spot with a stud on one side and nothing scary like pipes or wires lurking behind it.
Once you’ve tracked down the stud, cut a little peek-a-boo hole and check things out with your hands—better safe than sorry!

Step 3 Make the Rough Cutout

Line up the template with the stud, level as needed, and tape it down so it doesn’t go anywhere.
Trace the outline of the template. Once you’ve got your full template traced, remove it and finish cutting along the lines.
If you find insulation inside the wall, pull it out where necessary, but don’t toss it! You’ll need it to fill in any open areas later.
Recommended (but optional): Before moving on, add a bottom support stud between the wall studs to help secure the pet door. Pick a piece of lumber that fits your wall thickness, cut it to slide snugly between the studs (usually 14.5"), and lock it down with long screws driven in at an angle

Step 4 MARK DRILL POINTS FOR THE OUTER WALL

Take the included Outer Wall marking Template and place it on the bottom left corner of the tunnel on the outside frame, where it will gently touch the inside of the outer wall. The outside frame has the larger tunnel, and will not have the locking cover in it!
From inside the house, slide the outside frame partway into the wall opening until the Outer Wall Template reaches the exterior wall.
Using the small hole in the template and the provided pencil, mark the drill point.
Repeat this process for the top right corner: position the outer wall marking template, align it properly, and mark the spot.

Step 5 DRILL THROUGH THE OUTER WALL

Once both points are marked, drill straight through the wall at each location. These holes will guide you when installing the outer frame in the next step.
If you use a 1/4" drill bit, the next step will be easier but any drill bit will work.

Step 6 MARK WHERE TO CUT THE OUTER WALL

Head outside and line up the outer wall marking template with the holes you drilled earlier. Level the jig, then mark its corners on your wall.
If you need a little extra help lining things up, stick the drill bit in the hole to use as a pin. This works best with a 1/4" drill bit.
After marking your two corners, grab the cardboard template and line it up with the corners you marked to trace out the cut lines.
Then, remove the template and get your saw ready for the next step.

Step 7 CUT OUTER WALL OPENING

Cut the outer wall opening using the appropriate tool for your wall type (e.g., stucco, siding, etc.).
Take your time cutting along the lines—it’s all about accuracy here!

Step 8 INSERT PET DOOR FRAMES

Slide both frames (inside and outside) into the wall opening and telescope them together until snug against both walls. It is easier to insert the outside trim frame first, and this step is where an extra set of hands can be super helpful!

Step 9 SECURE THE FRAMES TO THE STUD

Get the frames leveled and aligned, then grab a helper to gently squeeze them together from both sides of the wall. Or use a large clamp, which can also hold open the flap for you.
While maintaining this pressure, drive two screws through the tunnels into the stud side—position one screw about one-third from the top and the other about one-third from the bottom. This ensures a snug and secure fit.
Repeat on the other side, even if there’s no stud—it will still hold securely.

Step 10 TEST YOUR WORK

Test the flap to ensure smooth operation. It should swing freely in both directions. If the flap catches at all, make adjustments before sealing the frame in the next step.

Step 11 SEAL THE FRAME

To ensure your pet door is weather-tight and energy-efficient, follow these sealing steps:
Seal the Interior Frame: Apply a bead of silicone caulk between the interior frame and the metal tunnel.
Seal the Tunnel Seams: Apply a bead of caulk along the seams where the two telescoping metal tunnel sections meet. This will prevent air or water infiltration.
Seal the Exterior Frame: On the outside of your home, apply caulk between the exterior frame and the wall. Be sure to seal the top and both sides, but not the bottom. You want that open for water to drain out.
Seriously - don’t seal the bottom, that’s your drainage zone!
Now, stand back, let your pet strut through their new door, and take all the credit. Well done!

Videos

Endura Flap High-Quality Design

Endura Flap Impact Test

Leaf Blower Test

Variable Magnetic Resistance

How to Remove Side Magnets for Easier Use

FAQs

FAQ

I have a small and large dog sharing this door. Will my small dog be able to open the flaps on the extra large double flap dog door? It depends on the tenacity of your small dog. With the Endura flap door for walls you can decrease the magnetic resistance of the threshold on large and extra large sizes making it easier for your small dog to use. You will also want to make sure the door is mounted low enough for the small dog to walk through and high enough to clear the large dog's back. This may mean purchasing a larger flap.
I do not have to contend with wind or rain. If I buy the single flap version of the wall dog door is it possible to add the second flap in the future? It is possible. Please reach out to Customer Service to order an exterior frame and flap. Note, you cannot change an Endura Flap Door Mount to a Wall Mount.
Are the panels/flaps flexible? Seems like it would trap a dog if it backed up. The Endura Flap is slightly more rigid than other economy style flaps, but it is a safe, soft, flexible flap. It remains flexible in temperatures as low as -40°F.
How easy is it to clean the flap? It is extremely easy to clean the flap. All you need to do is wipe it down with warm water and mild dish soap. Do not use any abrasive cleaners as you may damage the material.
How high off the floor should my dog door be? Generally, every pet door should be at least 3" off the floor to maintain your door or wall's integrity. The distance between the bottom edge of your pet door and the floor is called the step-over, and is an important aspect of determining how big of a pet door your dog requires. The step-over should be easy for your dog to "step-over," and never be more than a third of your dog's height. You can read more about step-overs in our measuring guide.
How secure is the locking cover on the Endura Flap Door? Endura Flap features a secure locking cover made of high-strength material comparable to 1/16" steel. Its integrated locking latch ensures the cover cannot be lifted or tampered with from the outside, providing a robust barrier for your home.
I don't want my cat to get outside, is this cat proof? A manual pet door can still be fairly simple for smaller pets to use, especially if they are determined to get outside. If you need guarantees that your cat is not going to use the dog door, a better suited pet door would be an electronic version that used a collar key or RFID chip scanner to ensure the pet flap was only unlocked for the pet you select.
I live in an area with hot summers and cold winters. Is this a 4 season pet door? Yes! It has been tested in temperatures as low as -40° and as high as 110° Fahrenheit.
I want to get the large pet door for my dog, but I am concerned about a person fitting through the pet door opening. All Endura Flap Pet Doors come with a locking cover. This cover can be used to keep your pet inside by blocking access to the doggie door. It also can be used to keep intruders from entering your home. It is made from a special polymer that is as strong as a 1/16" sheet of steel. If you need to close the pet door off from the exterior as well, you can purchase additional Endura Flap locking covers. We also have a product called the Watchdog Steel Security Pet Door Cover that provides maximum security for any pet door, complete with a combination lock and all. The cover comes in sizes large enough to fit even the XL dog doors for wall mount.
Is a single flap enough for extreme winter weather? A single Endura Flap flap is on the interior frame. It is energy-efficient and capable of withstanding winds up to 50 mph. However for extreme weather, we recommend the double flap which increases the efficiency. For timid pets you can remove the magnets on the interior flap or remove the flap completely.
Is the Endura Door for Walls easy to install? Ease of installation is very subjective, and it depends on skill set or access to certain tools that might be needed. The installation of a pet door into a door is easier than installing it through a wall; however installing it into a door is more complicated than putting a pet door into a sliding door track. We recommend a contractor for installations that involve cutting into drywall.
Are replacement flaps available? Yes, we carry Endura Replacement Flaps. They will work for all Endura models (wall mounts, doggy door mounts, kennel doors, window sashes, and sliding glass door patio pet doors).
Is the Endura Flap large wall mount door large enough for a lab? Due to variations in individual pet sizes within a breed, we generally prefer to go by height and width instead of breed. You can visit this page on our website to learn how to measure for a pet door.
Is the flap on the interior or exterior frame for single flap model? For the single flap wall mount, the flap is attached to the interior frame. If you live in a very cold climate, we'd recommend the double flap model to keep snow out of the pet door tunnel.
Other brands of pet doors with plastic flaps always warp and thus let in air. How do these flaps hold up over time? The Endura Flap is made with a special polymer called Polyolefin. It remains safe, soft and flexible in temperatures as low as -40°F. It does not yellow nor harden in the sun. The patented magnetic design ensures the door seals well for years. In fact, the pet door and flap are backed by a Lifetime warranty.
What if my wall is thicker than 7-1/2"? Not a problem! We make an Endura Flap for Thick Walls model which will expand to accommodate walls up to 13" thick.
What side does the locking cover slide in? All locking covers slide in from the top. If you purchase a double flap model, the locking cover can be used on the inside or outside frame, and from a security standpoint, when the locking cover is inserted on the inside frame it cannot be removed from outside your home. However, sliding the cover in on the outside frame can be a clear signal for your pet that access is currently unavailable when you would like to keep them outside. If you purchase a single flap, the locking cover is on the interior frame only (the side closest to the inside of your home).
Is there a difference in flap size for the single versus the double flap models? Each flap is 7/8" thick, and when a pet goes through a dual flap pet door, the flaps stack on top of each other. There will be slightly less space in the double flap opening versus the single flap. However, a properly sized pet door will have sufficient space above the shoulders of your pet to accommodate this difference. If you need help measuring your pet please refer to our measuring guide or reach out to our customer service team!
Will this keep one pet in while letting another out? This is not an electronic door so any pets will be able to go in and out if they push hard enough. In addition, it will not prevent any stray and other animals like raccoons from getting in.
Can a large dog & cat use the same double flap door flaps? Our Endura Flap wall mount pet door has a strong magnetic seal, and the larger size flaps may be too heavy for a cat. We have found that this can vary quite a bit, however, depending mostly on your cat's temperament. If you do have cats (or small dogs) and large dogs sharing a door, one option is to decrease the magnetic resistance of the pet door flap, making it easier for the smaller pets to use.
Can I get this pet door with a clear flap? The Endura Flap is only available with a translucent flap, but if you want a similar high quality, aluminum frame pet door that has a clear flap, we also manufacture the Liberty Pet Door line. Please reach out to our customer service team if you are interested in learning more about these pet doors!
Can I just get the Endura wall kit? We do have those, but you will need to reach out to our customer service team. For other Endura replacement pet products, see Endura replacement flaps and parts.
Does it come with a cover to lock it? It does come with a cover that is designed to slide in on the inside frame of the pet door, and will prevent unauthorized access from either pets, animals, or people.
Does the door sound very loud when the dog goes in or out? When the flap gets to its resting place there is a snapping sound when the magnets employ. This sound lets you know the door is doing its job sealing out the elements and keeping your heated or cooled air inside.
How can I tell if this will fit my cat? We generally recommend the small size pet door for cats. You can easily test fit by cutting a hole in a piece of cardboard to the 6" x 11" flap size and see if they can get through comfortably.
How do I know what size is best for my dog? When installing the Endura Flap wall door you want it to clear the top of your dog's back by 1-2 inches, minimum. You also want the step over to be comfortable. Lastly you want the width to allow your pet to go through without touching the sides. Here's a measurement guide with tips on how to determine the correct size.

I have a small and large dog sharing this door. Will my small dog be able to open the flaps on the extra large double flap dog door?

It depends on the tenacity of your small dog. With the Endura flap door for walls you can decrease the magnetic resistance of the threshold on large and extra large sizes making it easier for your small dog to use. You will also want to make sure the door is mounted low enough for the small dog to walk through and high enough to clear the large dog's back. This may mean purchasing a larger flap.

I do not have to contend with wind or rain. If I buy the single flap version of the wall dog door is it possible to add the second flap in the future?

It is possible. Please reach out to Customer Service to order an exterior frame and flap. Note, you cannot change an Endura Flap Door Mount to a Wall Mount.

Are the panels/flaps flexible? Seems like it would trap a dog if it backed up.

The Endura Flap is slightly more rigid than other economy style flaps, but it is a safe, soft, flexible flap. It remains flexible in temperatures as low as -40°F.

How easy is it to clean the flap?

It is extremely easy to clean the flap. All you need to do is wipe it down with warm water and mild dish soap. Do not use any abrasive cleaners as you may damage the material.

How high off the floor should my dog door be?

Generally, every pet door should be at least 3" off the floor to maintain your door or wall's integrity. The distance between the bottom edge of your pet door and the floor is called the step-over, and is an important aspect of determining how big of a pet door your dog requires. The step-over should be easy for your dog to "step-over," and never be more than a third of your dog's height. You can read more about step-overs in our measuring guide.

How secure is the locking cover on the Endura Flap Door?

Endura Flap features a secure locking cover made of high-strength material comparable to 1/16" steel. Its integrated locking latch ensures the cover cannot be lifted or tampered with from the outside, providing a robust barrier for your home.

I don't want my cat to get outside, is this cat proof?

A manual pet door can still be fairly simple for smaller pets to use, especially if they are determined to get outside. If you need guarantees that your cat is not going to use the dog door, a better suited pet door would be an electronic version that used a collar key or RFID chip scanner to ensure the pet flap was only unlocked for the pet you select.

I live in an area with hot summers and cold winters. Is this a 4 season pet door?

Yes! It has been tested in temperatures as low as -40° and as high as 110° Fahrenheit.

I want to get the large pet door for my dog, but I am concerned about a person fitting through the pet door opening.

All Endura Flap Pet Doors come with a locking cover. This cover can be used to keep your pet inside by blocking access to the doggie door. It also can be used to keep intruders from entering your home. It is made from a special polymer that is as strong as a 1/16" sheet of steel. If you need to close the pet door off from the exterior as well, you can purchase additional Endura Flap locking covers.

We also have a product called the Watchdog Steel Security Pet Door Cover that provides maximum security for any pet door, complete with a combination lock and all. The cover comes in sizes large enough to fit even the XL dog doors for wall mount.

Is a single flap enough for extreme winter weather?

A single Endura Flap flap is on the interior frame. It is energy-efficient and capable of withstanding winds up to 50 mph. However for extreme weather, we recommend the double flap which increases the efficiency. For timid pets you can remove the magnets on the interior flap or remove the flap completely.

Is the Endura Door for Walls easy to install?

Ease of installation is very subjective, and it depends on skill set or access to certain tools that might be needed. The installation of a pet door into a door is easier than installing it through a wall; however installing it into a door is more complicated than putting a pet door into a sliding door track. We recommend a contractor for installations that involve cutting into drywall.

Are replacement flaps available?

Yes, we carry Endura Replacement Flaps. They will work for all Endura models (wall mounts, doggy door mounts, kennel doors, window sashes, and sliding glass door patio pet doors).

Is the Endura Flap large wall mount door large enough for a lab?

Due to variations in individual pet sizes within a breed, we generally prefer to go by height and width instead of breed. You can visit this page on our website to learn how to measure for a pet door.

Is the flap on the interior or exterior frame for single flap model?

For the single flap wall mount, the flap is attached to the interior frame. If you live in a very cold climate, we'd recommend the double flap model to keep snow out of the pet door tunnel.

Other brands of pet doors with plastic flaps always warp and thus let in air. How do these flaps hold up over time?

The Endura Flap is made with a special polymer called Polyolefin. It remains safe, soft and flexible in temperatures as low as -40°F. It does not yellow nor harden in the sun. The patented magnetic design ensures the door seals well for years. In fact, the pet door and flap are backed by a Lifetime warranty.

What if my wall is thicker than 7-1/2"?

Not a problem! We make an Endura Flap for Thick Walls model which will expand to accommodate walls up to 13" thick.

What side does the locking cover slide in?

All locking covers slide in from the top. If you purchase a double flap model, the locking cover can be used on the inside or outside frame, and from a security standpoint, when the locking cover is inserted on the inside frame it cannot be removed from outside your home. However, sliding the cover in on the outside frame can be a clear signal for your pet that access is currently unavailable when you would like to keep them outside.

If you purchase a single flap, the locking cover is on the interior frame only (the side closest to the inside of your home).

Is there a difference in flap size for the single versus the double flap models?

Each flap is 7/8" thick, and when a pet goes through a dual flap pet door, the flaps stack on top of each other. There will be slightly less space in the double flap opening versus the single flap. However, a properly sized pet door will have sufficient space above the shoulders of your pet to accommodate this difference. If you need help measuring your pet please refer to our measuring guide or reach out to our customer service team!

Will this keep one pet in while letting another out?

This is not an electronic door so any pets will be able to go in and out if they push hard enough. In addition, it will not prevent any stray and other animals like raccoons from getting in.

Can a large dog & cat use the same double flap door flaps?

Our Endura Flap wall mount pet door has a strong magnetic seal, and the larger size flaps may be too heavy for a cat. We have found that this can vary quite a bit, however, depending mostly on your cat's temperament. If you do have cats (or small dogs) and large dogs sharing a door, one option is to decrease the magnetic resistance of the pet door flap, making it easier for the smaller pets to use.

Can I get this pet door with a clear flap?

The Endura Flap is only available with a translucent flap, but if you want a similar high quality, aluminum frame pet door that has a clear flap, we also manufacture the Liberty Pet Door line. Please reach out to our customer service team if you are interested in learning more about these pet doors!

Can I just get the Endura wall kit?

We do have those, but you will need to reach out to our customer service team. For other Endura replacement pet products, see Endura replacement flaps and parts.

Does it come with a cover to lock it?

It does come with a cover that is designed to slide in on the inside frame of the pet door, and will prevent unauthorized access from either pets, animals, or people.

Does the door sound very loud when the dog goes in or out?

When the flap gets to its resting place there is a snapping sound when the magnets employ. This sound lets you know the door is doing its job sealing out the elements and keeping your heated or cooled air inside.

How can I tell if this will fit my cat?

We generally recommend the small size pet door for cats. You can easily test fit by cutting a hole in a piece of cardboard to the 6" x 11" flap size and see if they can get through comfortably.

How do I know what size is best for my dog?

When installing the Endura Flap wall door you want it to clear the top of your dog's back by 1-2 inches, minimum. You also want the step over to be comfortable. Lastly you want the width to allow your pet to go through without touching the sides. Here's a measurement guide with tips on how to determine the correct size.

Reviews

Endura Flap Wall Mount Pet Door for Thick Walls

Lifetime Warranty

Installation & Fit

Best Suited For

Questions

Endura Flap Wall Mount Pet Door for Thick Walls

Small / Single / White Choose Options

Product Details

Size Chart

Flap Dimensions:

Outside Frame Dimensions

Rough Cut Out:

Flap Dimensions:

Outside Frame Dimensions

Rough Cut Out:

Flap Dimensions:

Outside Frame Dimensions

Rough Cut Out:

Flap Dimensions:

Outside Frame Dimensions

Rough Cut Out:

Flap Dimensions:

Outside Frame Dimensions

Rough Cut Out:

Installation Information

Double Flap Wall Mount Instructions

Parts

Tools

Step 1 Measure Your Pet

Step 2 Prepare Wall for Installation

Step 3 Make the Rough Cutout

Step 4 MARK DRILL POINTS FOR THE OUTER WALL

Step 5 DRILL THROUGH THE OUTER WALL

Step 6 MARK WHERE TO CUT THE OUTER WALL

Step 7 CUT OUTER WALL OPENING

Step 8 INSERT PET DOOR FRAMES

Step 9 SECURE THE FRAMES TO THE STUD

Step 10 TEST YOUR WORK

Step 11 SEAL THE FRAME

Videos

Endura Flap High-Quality Design

Endura Flap Impact Test

Leaf Blower Test

Variable Magnetic Resistance

How to Remove Side Magnets for Easier Use

FAQ

Customer Reviews

Endura Flap Wall Mount Pet Door for Thick Walls