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Patio Pacific Endura Flap Thermo Panel 3e Sliding Door Pet Door

"This product far exceeded my expectations. Well engineered, quality build and excellent materials. A lot of thought went into this door. it works. Not too many folks live in a harsher winter area than me. This door works for my 15 year 65 lb lame old dog and keeps the cold out. A lot of money for a dog door but worth every penny." - Brian K.

Patio Pacific - Product #: 01PPC06-PB

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Endura Flap Thermo Panel 3E (IIIE) Best Pet Door for Sliding Glass Doors & Patio Doors for Dogs and Cats

The Patio PacificThermo Panel IIIE Pet Door with the Endura Flap is a dual pane sliding door pet door, that uses low 'E' glass. This design is ideal for places with extreme weathers because it can help to retains heat in a house in a freezing blizzard, or keep the cold air in, during a heat wave. The dual pane, low 'E' glass also minimizes and sometimes eliminates condensation on the glass.

The Thermo Panel 3E also features the award winning Endura Flap Pet Door, the ONLY pet door design that has won the Dog Fancy and Cat Fancy Publication's Editors' Choice Award for Creativity and Innovation! There are so many reasons why the Endura Flap is a superior product to any other doggie door or cat door on the market. Click here to find out more about why the Patio Pacific Endura Flap is the BEST.

This Thermo Panel IIIe model - is identical to the Quick Panel III. Both are dog doors for sliding glass doors, but the other Quick Panel model uses a single pane glass, which is less effective for extreme climates.

We also highly encourage including a Bug Warden along with all Patio Pacific Sliding Glass Pet Doors. This patented unique product helps to block any unwanted insects from getting into your home!

Need help finding the best Endura Flap Thermo Panel Pet Door size? Don't hesitate to call or email us. We'll help find the right size for your cat or doggie!

Endura Flap Thermo Panel Sizing Information

Here are steps to size your pet for the ideal flap size:

  1. Cut a hole in a piece of cardboard the same size of the flap that you think would fit best. It's best to start smaller, because you can always cut a larger hole.
  2. Have your dog or cat walk through the cut out hole (use treats if necessary). You can try placing the cardboard in the opening of a door so they have to walk through the hole to get to the treat.
  3. If the hole is too small, try cutting a hole for a larger size and/or order one size up.
  4. If your dog is able to get through easily, check and record the step over height (height from floor to bottom of the opening) works best for your pet. This will be the height you install the opening at for your pet.

Click on the Sizing & Measuring tab for more details on how to measure the right size for your pet.

Additional Thermo Panel Considerations

There are quite a few issues that might be important for you to think about in purchasing any panel pet door. Begin with key points to get a quick overview of the most important ones. Then read the information on the patio panel FAQ page which cover the fine points of patio pet doors.

Themo Panel 3e and Endura Flap Fit and Dimensions

Thermo Panel 3e Fits any Sliding Glass Door with a minimum track width 1"

Flap Size Flap Dimension Step Over Range Overall Panel Width Stock No
Small #6 6" w x 11" h 3"-5" 11 1/4" 01PPC06
Medium #8 8" w x 15" h 3"-5" 13 1/4" 01PPC08
Large #10 10" w x 19" h 3"-5" 15 1/4" 01PPC10
Extra Large #12 12" w x 23" h 3"-7" (ships at 5") 17 1/4" 01PPC12

Height Options

  • P - 74 3/4" - 77 3/4"
  • Q - 77 1/4" - 80 1/4"
  • R - 93 1/4" - 96 1/4" (Oversize Range)

Note: Larger Endura Flaps are not recommended for use by kittens or tiny dogs. Cats have been successful using the Small #06, however a few have found the Medium #08 difficult to use. We would not recommend using the Large #10 or Extra Large #12 or any of the double flap versions for cats. 

Patio Pacific Thermo Panel 3E Key Features

Easy Installation - Patio Pacific manufactures the Pet Door for sliding glass panel doors that does not require tools or a drill to install. It also features an easy to use and unique user adjustable step-over to adjust to the pet door opening to any height that your little fur babies might need

Built-in Room for Measurement Errors (aka "Anti Whoops" Feature) - In the event that your measurements are off by a little bit, you have the chance to save the situation by using the "anti-whoops" feature. This allows which allows for 3/4" change in adjustment range to accommodate accidental measuring errors.

Keep Your Home Safe and Secure - The Thermo-Panel IIIe includes an easy way to lock any sliding door as well as a secure metal frame and a sturdy locking pet flap cover. The sturdy locking cover comes with every Endura Flap pet door, and has been designed to have a strength equivalent to 1/16" steel plate.

Designed to Be Safe for Your Pets - The patented flexible nature of the Endura Flap is far safer than other pet door with a rigid door designs. This is because it removes any of the flap pinching or snagging on your dog or cat, in the event they pull back quickly while walking through the door (this can happen if he/she gets scared while walking through)

Superior Insulation - The Endura Flap combines dual-pane glass, which offers superior insulation for greater energy efficiency. This means you will save money on energy bills unlike the majority of pet doors on the market that have little to no protect against hot or cold weather.

Built to Last - The cost of replacing the flaps on most cheap pet doors often exceeds the original cost of the door. Most pet door flaps, it begins to split, wear, and eventually breaks. However, the Endura Flap uses a unique pivoting design, to avoid wear and breakage. It is so well designed that the manufacturer has an industry best 15 year warranty!

Environmentally Friendly - The Endura Flap is made using non-toxic, recyclable, and green for the environment a polyolefin-based polymer (similar to material used in food storage containers). Unfortunately, most pet doors are made with PVC, or vinyl, which is very harmful to the environment. 

Superior Design and Functionality - There are so many reasons why the Endura Flap is such a superior performing pet door. For those looking for even more technical information there has even been a 74-page dog door energy efficiency study showing exactly what features make it the absolute best.

Patio Pacific Endura Flap Pet Door 15 Year Comprehensive Warranty

To the original purchaser, Patio Pacific Inc warrants this product and all of its component parts to be free of defects in materials or workmanship for a period of 15 years from the date of delivery to the customer. Find out more here: Patio Pacific Endura Flap Warranty Terms & Details

Product Details

  • Manufacturer - Patio Pacific Inc
  • Your Maximum Pet Size - Cats, Large Cats, Small Dogs, Medium Dogs, Large Dogs, X-Large Dogs
  • Climate Suitability - Severe-4 Season
  • Sealing Value - Very High
  • Wind Resistance - Very High
  • Type of Window - Sideways Sliding
  • House Locking Method - C-Clamp Lock
  • Frame Material - Heavy Extruded Aluminum
  • Custom Heights Available - Yes
  • Can Fit Sideways Sliding Windows - Yes
  • Track Width Minimum - 1"
  • Built-In Adjustment For Small Measuring Errors - Yes
  • Tools Required For Installation - None
  • Patented User-Adjustable Step Over Height - Yes
  • Employs Patented Endura Flap? - Yes
  • Insulation Value - High
  • Possible to Add Additional Magnets for Greater Wind Resistance - Yes
  • Flap Material - Engage
  • Flap Design - Single, One Part , Flexible, Insulated Flap
  • Flap Colors - Clear
  • High Aspect Ratio - Yes
  • Flap Thickness - 7/8"
  • Award Winning Design - Yes
  • Flap Warranty (if separate) - 15 years
  • Locking Cover Material - Dimensional ABS
  • Can Be Installed In - Single Pane Glass Sliding Glass Door, Dual Pane Glass Sliding Glass Door, Vinyl-Framed Sliding Glass Door
  • Dual or Single Pane - Dual Pane
  • Low "E" Coating - Yes
  • "Draft Stopper" Included to Seal Stationary & Sliding Panel Overlap - Yes
  • Warranty Period - 10 years

    Measure Your Pets (and SAVE money)

    1. Sizing Information
    2. Video Demonstration on Measuring Your Dog or Cat
    3. Description and Picture Guide to Measuring Your Pets
    4. Measuring for a Sliding Glass Door Pet Door

    Sizing Information

    Flap Size  Breed Size Examples* Flap Dimension Rough Cut Out Outside Frame Dimension Flap Type

    Cats, Chihuahuas, Pomeranians, Papillons, Yorkies, Maltese, and Japanese Chins 6"w x 11"h 8 3/8"w x 15"h 9 7/16" w x 16" h Single
    6"w x 10"h

    Poodles, Corgies, Dachunds, Beagles, Pekingese, Shelties, Schnauzers, Cocker Spaniels, and Most Terriers 8"w x 15"h 10 1/2" w x 19"h 11 1/2" w x 20" h Single
    8"w x 14"h

    Labradors, German Shepherds, Gold Retrievers, Boxers, Collies, Setters, Bulldogs, Pointers, and Dobermans 10"w x 19"h 12 1/2"w x 23"h 13 9/16" w x 24"h Single
    10"w x 18"h
    Extra Large

    Malamutes, Weimaraners, and Rhodesian Ridgebacks 12"w x 23"h 14 5/8"w x 27 1/8"h 15 5/8" w x 28" h Single
    12"w x 22"h

    *Breed Sizes
    Breed sizes are just examples only. It does not guarantee that your pet will fit. Please make sure to measure your pet carefully, using the below measurement guides, to ensure the flap size will fit them properly.

    Number of Flaps 
    1 - Single Flap - On inside frame (same side as locking cover) 
    2 - Double Flap - One on each side. The included dead-air-space from the second flap adds significantly to the already considerable insulation and sealing capability. 


    Video Measuring Guide



    Do Not measure your pet directly!

    It's just too difficult to do it with any accuracy. Instead do the following:

    1. Open a door as wide as he needs to comfortably walk through.
    2. Use a treat for motivation.
    3. Measure that width.

    You need the flap to be at least that wide. It doesn't need to be wider. Realize that the top of the flap should be mounted at, or better an inch, over his height at the top of his shoulder (the withers).

    The lower the bottom of the flap, the better. In no case, should the "step-over" exceed 1/3 of the height at the withers. Pay special attention if your dog has a particularly deep chest or is low slung and adjust accordingly.


    General, a good dog if ever there was one, weighs 60 lbs. He easily fits through a 7" wide opening. His pet door measures 8" wide.
    He's 20" at the withers and the top of the flap he uses is at 22". The flap is 15" tall so he's stepping over 7" (that's the "step over") This pet door suits General just fine.

    Since this panel pet door has a "user-adjustable step over" feature, we'll probably end up lowering the step over to 5" and the top of the flap to 20". That'll make it easier to step over when he's older.

    If you look at General standing right next to his pet door, you'd say "impossible". But actually it suits him very well.

    If we also had a much shorter dog, we might have required more height in the flap to get the bottom down lower. The taller flap, in turn, would probably be wider as well.

    Look for "high aspect ratio" flaps to get more height for a given width.

    If you have a tall, skinnier dog or a large dog sharing a pet door with a smaller dog or otherwise would like to have a taller pet door without having the pet door be wider than necessary:

    A pet door with a "high aspect ratio" would be the Endura Flap.

    You can also try the cardboard method:

    An easy way to test flap size for your pet is to cut a hole in a piece of cardboard that is the size of the flap you are interested in, then coax your pet through (use treats if necessary). Place the cardboard in the opening of a door so they have to walk through the hole to get to the reward! See what flap size and step over height (height from floor to bottom of where the flap will be installed) works best for your pet.

    Why is measuring so important? What are we really trying to do?

    We are trying to make the pet door as 'accessible' as possible for your pet.

    Here's why. The time will come when your pet won't be able to use his pet door. Maybe he's got arthritis. Maybe he's got hip problems or an injury. Maybe he's just old and can't move very well. But he's still alive and he's still your 'baby'.

    The point here is that you want that time when he can no longer use the pet door to be as far away as possible. And what that means is that you want to buy a pet door that will be easy to use not so much now but when he's old and not so agile.

    Get a pet door that's not really big enough and he'll use it for many years. But when he can't do it anymore, that time will be sooner than it would have been if you had chosen a properly sized pet door.

    So what is "properly sized"? Well, the top of the opening is at or above his withers so he doesn't have to crouch. The width is as wide as he is or a little wider. And the 'step-over' is as low as you can get it while still keeping the top of the opening up at or above his withers.

    Incidentally, this is what 'high-aspect ratio' pet doors is all about. For a given width, you get more height which actually means you can get the step-over lower to the ground for easier access later in life.

    Of course, there are situations that can change things. Maybe he's a youngster and you're not going to be in this house for very long. In that case, mount the pet door at the correct height--at or above his withers--and he'll be able to use a higher 'step-over' until you move. You can get a properly sized pet door at your next house.

    Measuring for a Sliding Glass Door Pet Door

    You'd be surprised how many people skip this step assuming that what they have must be 'standard'. It is true that sliding glass door tracks tend to cluster in particular height ranges. 78" to 80" is one such range. But there are several other common ranges. And there are a great many sliding glass doors that don't fall into any particular 'standard' range. Don't take the chance!

    Measure and here's how:

    • Put the end of your measuring tape up inside the track at the top as high as it will go and measure down a convenient distance and draw a line with a pencil.
    • Then put the end of the tape down into the track at the bottom of the track as deep as it will go and measure up to that line.
    • Add the two together.

    The result will be very accurate. PS - Why not measure all at once? Well, you'll be trying to measure the tape where it's curving and you can't be very sure where it's actually ending. Then, when you look at the various pet door height adjustment ranges, you may very well find that the measurement you've taken is quite close to the limit specified or even outside that limit. Now what? Answer: Go back and do it right. Might as well the first time. Write that number down so you've got it handy.

    What if I've Mis-Measured?

    It happens. What is more common, though, is that your measurement is very close to (or even a little below) the bottom of the adjustment range of the pet door you want. In this case you may have a problem even though your measurement is in the adjustment range. This is because the pet door needs to get a little shorter to get up and over the bottom rail to get into the track. If it's already close to it's shortest adjustment range, it may not be able to get short enough to actually be installable. The opposite problem is when your measurement is at or a little above the top of the adjustment range. We recommend a discussion with our customer service department in both these cases. However, we also should mention that the Patio Pacific Panel doors all include an 'anti whoops' feature that addresses both these problems.

    Questions & Answers

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    General Pet Door Questions

    Wall Mounted Pet Door Questions

    Door Mounted Pet Door Questions

    Sliding Glass Door Pet Door Questions

    Sash Window Pet Door Questions

    General Pet Door Questions

    How do I measure my pet for a pet door?

    Please see our Measuring Guide for a detailed guide.

    Should I choose a Double or Single Flap?

    Most of the pet doors we sell are double-flap doors. The air-space between the two flaps of a double flap wall mount will insulate much better than a single flap pet door and the double flaps will stand up to wind much better. Double Flaps will look more finished having a flap on both sides of the wall. We also haven't encountered any additional difficulty for the pets in using a double flap provided that a reasonable flap size is chosen by the customer. If you live in a very moderate climate, or the door will be under a covered area or in an unheated garage/shed, then the single could be an adequate option. In the end, Endura Flap pet doors seal so well that a single flap should be adequate for most moderate climates. Single Flap doors will have the flap on the inside and a trim frame to finish out the opening on the outside.

    Which side does the locking cover go on?

    For Patio Pacific Pet Doors, the locking cover is on the inside of the house so outsiders cannot unlock it. Also, when there is bad weather you will not be forced to go outside to close off the in wall dog door. 

    I have a Great Dane and an 8 pound Yorkie. What dog door should I get?

    Hale offers doors that are great for large and small dogs sharing because the flap is easy to push and giant sized doors are offered. Another option would be to get a Plexidor Electronic Dog Door so that your 8 pound Yorkie isn't trying to push open a Great Dane sized flap.  You want to make sure that you measure both pets to get the size that comfortably fits both pets. You don’t want the step over too high or the flap too low so the big dog is left having to crouch. 

    My dog or cat won't push on a flap do you have a pet door that would work?

    Any of the motorized Plexidor Electronic Dog Doors would be good in this situation.

    What if I want to close the door at night, how can I do that?

    Most doggie doors (with the exception of kennel use type doors) will come with some way to close it off when not in use. The more common types are the “slide-in” closing covers, such as with the Patio Pacific Endura Flap Pet Doors. These ones will slide in from top to bottom. The electronic door option can be programmed to be opened and closed at certain times.  A neat feature of the Hale is that they offer a “side load” option in case there is something above the pet door like a window sill.  This way you can actually slide the cover in from the left or the right side.  The Plexidor has a keyed lock in the medium, large, and X-Large sizes, and an aluminum cover that you can screw on if you are away for a longer period of time for extra security.

    Will I have a hard time training my dog to use the Endura Flap?

    With the proper training, your dog should get the hang of it. To make it easier for your dog to learn how to push the flap open, you can adjust the magnet strength. Only the Endura Flap has variable magnet strength. You can rearrange the magnets to either make it have increased wind resistance or to make it easier for pets to open.

    Please also see our Training Guide for more information.

    Can I paint over my Patio Pacific pet door?

    Satin and bronze (anodized) should not be painted. A special primer and additional preparation is required. However, for white painted doors, they can be painted using a good indoor/outdoor spray paint like Krylon or Rust-Oleum. The surface must be prepared first by removing the gloss on the white paint using a Scotch-Brite pad or fine steel wool. Just break the gloss, do not sand the paint off. Then clean the surface using mild detergent and water, or isopropyl alcohol. The Trim Frame can be painted, however we do not recommend painting the Flap Frame because:
    1. It would need to be partially disassembled (remove flap, strike, and side magnets).
    2. There are many difficult to access areas which could lead to drips and non-painted areas
    3. Paint could cause the flap to stick.

    Wall Mounted Pet Door Questions

    What are the advantages/disadvantages of installing a pet door in a wall?

    Advantages: You may have no other convenient locations for your pet door, in which case it is handy to know that the wall is an option. A pet door in a wall can always accommodate a double flap version of the pet door you want if that is available. The double flap version will always insulate, seal, and stand up to wind better than a single flap version. If you want to remove the pet door at some future date (say you sell the house and the buyer doesn’t want the pet door) and you’ve installed the pet door in a door, then you’ll be buying a whole new door which can be expensive. On the other hand, depending upon the type of construction, a pet door in a wall may be removed and the wall patched pretty inexpensively.

    Disadvantages: Installation through a wall can be dangerous! If you cut into electrical conduit or pipe you can be injured or even killed. We recommend a licensed contractor for this type of installation.

    If the siding is practically anything other than stucco, it can be difficult or impossible to remove the pet door and patch the wall so that it looks “like new.” Brick siding, rock siding, wood or shingle and vinyl siding all present problems when removing a pet door from a wall.

    The same consideration is true for the inside wall. Drywall is easy to patch, but wood paneling may not be. If the wall is thicker than about 8” (not very common but it happens) the selection of “self-framing” pet doors diminishes greatly. If the wall is thicker than 16” there are no “self-framing” options except for a few cat-sized pet doors. Since wall studs are usually 16” on center, a pet door requiring a “rough cut” wider than 14 ½” will probably not fit between your existing studs. There are ways to solve this problem but, again, only a licensed contractor should attempt them.

    What does it mean to "frame out" a wall?

    A wall installation pet door must always include a tunnel through the wall. The primary purpose of this tunnel is to ensure that water cannot penetrate into the interior of the wall-- a leak into a wall if not quickly discovered and repaired would have very serious and expensive consequences. As a secondary issue, the tunnel provides the pet with stable footing.

    There are two ways to accomplish this tunnel. The first and easiest is to purchase a “self-framing” wall mount pet door. This type of pet door will be provided with its own tunnel which is typically adjusted by cutting to fit the depth of the wall in the case of the studerier wall mounts with aluminum tunnels. Or telescoping for some of the more economy style plastic models.

    The second way is to frame the wall yourself (or have your contractor do it) typically using lumber to build a wood tunnel through the wall. In either case the tunnel is carefully caulked to ensure water-tightness and any wood used is sealed.

    While framing yourself is probably going to involve more work and expense, it does have the advantage of allowing you to use virtually any pet door for your wall installation. That advantage is largely offset by the fact that there is a very good selection of “self-framing” wall through pet doors to choose from.

    What if my wall is thicker than 8"?

    If the wall is thicker than 8", the selection of self-framing pet doors goes down. We recomend a Hale Wall Mounted Pet Door or Plexidor Wall Mounted Pet Door.

    What is the difference between a door mount and a wall mount dog door?

    Doggie doors for walls must always have a tunnel through it for support and structural purpose, while a door mount does not.  The hardware will also vary depending on the manufacturer and model, and also some will come as a complete unit with tunnel and hardware included like the Endura Flap for Walls.

    Is it easy to install a wall mount?

    There are many steps that must be taken to ensure that a wall mount is safe and secure so that internal wall damage doesn't occur and so that a safe tunnel can be built. For this reason, along with the framing that must take place, it is not easy to install a wall mount. We highly recommend you hire a licensed and insured professional. Cutting a power line or hitting a pipe with power tools could cause injury or even death.

    Can I install a wall mount in a wall with siding? If so how would I do that?

    Yes, you can install a wall mount into a wall with siding. There are several of ways to install the mount, and this depends upon your particular installation situation. Some customers choose to lay the wall pet door on top of the siding and other recess it into the siding for aesthetic reasons. The main thing would be to make sure that everything is properly sealed up.

    Door Mounted Pet Door Questions

    Does it matter if my door is hollow core rather than solid core?

    It used to matter a lot. In the old days pet doors consisted of a frame and flap assembly for one side of the door and sometimes, but not always, a decorative trim frame for the other side.

    These worked fine in a solid core wood door (though you did need to seal the exposed wood if you didn't want rot). If you wanted to install one of these in a hollow core door, you had to "frame out" the door first so that the weather didn't get inside the door between the two pet door frames. Of course, the lumber yard didn't have any wood that would fit inside the sides of the hole that you cut so you needed a table saw to fit the frame pieces. It was a huge hassle.

    Then Pet Eze Company developed a pet door where the outside frame wrapped through the hole in the door to meet with the inside frame. All you had to do was caulk the seam between the two and you were done. No framing or sealing needed!

    Today nearly every pet door on the market is self-framing though not all and you should remember to check especially if your door is hollow-core.

    The main reason a self framing door is nice is because it makes the appearance of the overall door much nicer, as it covers up the mistakes you might have made along the way. The self framing door gives it a full, professional look at the end of the job. It also makes it easy to seal everything in, keeping the moisture out of the inside of the frame and preventing damage to the pet door or the door itself.

    The same consideration is true for the inside wall. Drywall is easy to patch, but wood paneling may not be. If the wall is thicker than about 8” (not very common but it happens) the selection of “self-framing” pet doors diminishes greatly. If the wall is thicker than 16” there are no “self-framing” options except for a few cat-sized pet doors. Since wall studs are usually 16” on center, a pet door requiring a “rough cut” wider than 14 ½” will probably not fit between your existing studs. There are ways to solve this problem but, again, only a licensed contractor should attempt them.

    What exactly does it mean to be "self-framing"?

    Self-framing' means that the frame of the pet door wraps from the inside around to the outside of the door. The result is that the 'core' of the hole that you cut is hidden or 'framed off'. This is a desirable feature because it is neat and finished-looking. If the core of the door that you are cutting into is hollow or insulation-filled, it must be framed out which is difficult to do yourself without a table saw and some carpentry skills. Instead, let the pet door do it for you! The illustration at far right shows a cross sectional view of a self-framing pet door.

    The illustration at near right shows that a self-framing pet door can be adjusted in a range of thicknesses. The illustration shows a self-framing pet door installed in a thin panel. All self-framing pet doors can be installed in standard dimension interior or exterior doors. But be sure to check the adjustment range if you plan to install in a thinner material--such as a metal kick panel in a screen door--or a thicker material--such as a wall--to be sure that the pet door you choose will adjust to the particular installation.

    For installation in particularly thin materials such as a thin metal kick plate, a security grill or the siding between studs in an unfinished wall consider the Petsafe Classic pet door as it will adjust to as thin as 1/16th inch.

    By contrast, a 'Standard' pet door will provide a frame for both sides of the door or wall, but the frames won't meet in the middle so the core, or interior, of the door or wall will remain exposed.

    Please note that even though you use a self-framing pet door, you should still use caulking to ensure that no moisture gets through a seam to damage the interior of your door or wall.

    Any self-framing pet door will have an adjustment range. The adjustment range for some doors may be limited so it is important to be sure that the thickness of the door you plan to install in is in that range before buying. 

    Can I install a pet door into a garage door?

    Yes, a dog door can be installed in a garage door, but it is probably hollow and may be thinner than an ordinary door so we recommend going with one that is self-framing as described above.  Although, there are a few issues that arise such as how the flap may hang when the garage door is open as well as the overall safety of your pet in an area where cars may be coming and going.  As a result, we don't particularly recommend this option, but the Endura Flap pet door can work for garage doors as they have significantly more magnet strength to keep the flap in place when the door is raised.

    Is installation of a dog door in a ‘people’ door easy?

    That highly depends on the type of door, surface material and your handy skills. Please refer to the installation instructions for your specific product in order to help understand the difficulty of the installation. These can usually be found on the product page under the “Installation Instructions” tab.

    Does it matter how thick or thin the door is?

    Every self-framing pet door has an adjustment range that indicates the thinnest and the thickest doors it can be installed in. If you go too thin, the pet door is loose and prevents it from fully fitting into the hole in the door, creating more room for moisture and potential damage to the door. If you go too thick, the inside and outside frames do not meet leaving your inside rough cut out exposed. So it is important to measure the thickness of the material that the pet door will go into before hand and make sure that figure is inside the range of the pet door you are considering. Each self-framing pet door on this site shows this adjustment range in the features on each specific product page. For very thin doors, such as storm doors, we highly recommend the Patio Pacific Endura Flap as it can frame down to ½” in the single flap version.

    Note that you can always shim out the opening if the door is too thin. Clever work with a router can fix the case where the door is too thick.

    Does it matter what material my people door is made out of?

    In most situations, as long as your door material is sturdy enough to support the installation of the pet door then it does not matter what material the door is made out of. You will also want to make sure that your door is the appropriate thickness for the pet door you are planning to install. However, one situation where it does matter is if your door is made out of metal and your pet door you are trying to install is an electronic door. In this case, you may have a problem with the functionality of your pet door. This type of situation would require a wooden frame between the door and pet door, and the special instructions for installation would help guide you through this process.

    Sliding Glass Door Pet Door Questions

    What is the difference between the Patio Pacific Thermo Panel and the Patio Pacific Quick Panel?

    The Thermo and Quick Panels are identical except the Quick Panels have heavy duty single pane glass while the Thermo Panels have dual pane, low 'E' glass. For this reason, the Quick Panel is a better fit for more moderate climates or where a lighter weight panel is desired and the Thermo panel is more suitable for four season use and extreme weather.

    How do I tell if my sliding glass door is dual-pane or single pane?

    Open your slider and put a finger on both sides of the glass. If your fingers look like they're touching, you have single pane glass. If they stop about 1/2" apart, you have dual pane glass. You probably won't be able to tell if you have a low "E" coating, though you may see a slight tint that would give it away. To the right is an example of what a dual pane/low “E” coating door would look like, so you can better determine what type of door you own.

    Will insects be able to come through the doorway, between the sliding glass door doggie door and sliding screen door?

    You can still get ventilation with a glass track installation by opening the sliding glass door and bringing the screen up even with the pet door. But how do you stop a bug from flying in between the screen and the pet panel?

    The best solution to this problem is the Bug Warden which was specifically designed by a Southern California engineer. Simply select the option to add the Bug Warden when you are adding a Sliding Glass Door Pet Door to your cart.

    The Dreaded "Bug Gap"
    Bug Warden - Installed; No Bugs!

    How will I lock up my house with the installed sliding door doggie door in place?

    Patio Pacific pet doors include either a pin lock, c-clamp lock or dead-bolt lock to lock the glass door against the pet door, depending on the model or size ordered. These can be used for both temporary and semi-permanent types of installations and are extremely effective. Note that pin locks are most readily used when the sliding panel is on the inside track. If it is on the outside track (an uncommon situation), it may be easier to install a threshold mount dead-bolt type lock.

    In addition, you may also use a 'Charley Bar'. The Charley Bar mounts behind the sliding glass door on the jamb and locks the sliding glass door against the pet door. You don't need a pet door to use a Charley Bar. They're frequently used just to improve the security of a sliding glass door. When used with a pet door, the Charley Bar has an important added benefit. The pressure applied is near the center of the sliding glass door which results in more even pressure between the sliding door and the pet door. This, in turn, helps make a tighter seal between the two and reduces the chance of a leak.
    Wedgit Charley Bar

    My sliding glass door has 2 sliding doors. Do you have any patio panel pet door inserts that will work for this type of door?

    Depending on the track setup we have had customers install the Thermo Panel IIIe in this type of sliding door. However, a good way to install them is to move one of your sliding glass doors over offsetting it.  Then install that sliding glass door pet door and make the offset slider stationary, serving as the wall.

    Sash Window Pet Pet Door Questions

    What exactly is a Sash Window and how is a pet door installed in one?

    A sash window, or ‘double-hung’ window consists of two window units, one above the other, in separate tracks. The bottom unit slides up and down in the inside track and in the case of double-hung windows the top unit may slide in the outside track as well. There may be a locking device in the center where the two window frames meet.
    Sash Window Picture
    This installation is very simple, and may require no tools. The lower window is raised and the pet door is positioned in the track beneath the window. Then the window is closed down on top of the pet door sash.

    What are some specific points that I should think about when considering a sash window pet door?

    Is the window close enough to the floor that my pet can easily and safely access the pet door? If not, do I have a way to put steps or a ramp to make it accessible? The same consideration applies to the outside of the window as well, say if your window leads out to a deck where they would have to step up or down to get through. Is insulation quality a major concern when choosing your sash window pet door? Or is keeping other animals out a bigger issue? The window track width is also important, as it has to be wide enough to accommodate the framing of the sash window. The Patio Pacific sash windows will require a track that is at least 1” wide. Knowing how high you can raise the window in order to install the door is another piece of information you will need.   

    What will I have to do with the screen on my window that I want to install a pet door in?

    The screen must come off in order to allow your pet to enter and exit freely.  Your screen should be held in a frame that can pop off the outside and you can store for future use.

    Can I switch the side the pet door is on with the Patio Pacific Thermo Sash? How?

    Yes you can switch the side the pet door is on. You can start by removing the screws on the top and bottom, then sliding the flap assembly out.  Once it is removed you simply flip it upside down and slide it right back in.  Next you put the screws back in, tighten them all down and you’re finished. 

    Can you make a Patio Pacific Thermo Sash smaller than the 22" adjustment?

    Not generally if you want glass in it.  What you can do is trim down the spring loaded piece on the side, to give you an extra ¾” of compression so that you can get it down to 21-¼”.  If this is still not enough then give us a call with your dimensions because we might be able to build one for you that only uses metal and not glass.  This may not seem as nice aesthetically, but it will get the job done and you’ll be very happy with the Endura flap choice.   

    How high do I have to raise my window in order to get the Extra Large flap size for a Thermo Sash IIIe?

    To get the extra large flap size, you will want to raise the window height by 30 1/2". Sash Pet Doors are not adjustable in height, so taking this measurement before placing the order is very important.  The last thing you want to do is order a flap dimension that is too large and will not fit, meaning that you have to pay for all the return shipping fees. If it is a custom size, then it would be non-returnable.

    I ordered the 22" - 25" range for my Thermo Panel, but my window is actually 25.5".  Is there anything I can do to make it work?

    You can use the included extension (3/4") with the anti-whoops feature, and this can help to extend your window if it's a little short. You could also slide a piece of wood into this groove to achieve the same effect.

    Patio Pacific Pet Door Installation Guides and Videos

    1. Installation Guide - Wall Mounted Pet Door
    2. Installation Guide - Door Mounted Pet Door
    3. Installation Guide - Thermo Panel and Quick Panel
    4. Installation Guide - Thermo Sash Pet Door for Sash Windows
    5. Common Pet Door Installation Problems and Solutions
    6. Adjusting the Magnet Strength on a Patio Pacific Endura Flap
    7. General Information on User Adjustable Step-Over

    Installation Guide - Wall Mounted Pet Door

    To see the Installation Manual - Click Here

    Installation Guide - Door Mounted Pet Door

    To see the Installation Manual - Click Here

    Installation Guide - Thermo Panel and Quick Panel Models

    Patio Pacific sliding glass dog doors under 80 ¼” do not require tools, however everything above this height generally will require some tools for installation. What we call a sectional panel will be shipped in two pieces because it is so tall. Breaking the pet door for sliding door down saves the customers on shipping costs, because we are able to ship in a smaller package. The sectionals will need to be assembled with 4 hex screws and a hex wrench, all of which are provided.

    To see the Installation Manual - Click Here

    Thermo Sash Pet Door for Sash Windows

    To see the Installation Manual - Click Here


    You've got a hollow-core or steel door

    Best bet is to purchase a self-framing pet door. Then you may skip the framing part below.

    If you've already got a pet door that isn't self-framing, you'll need to frame the hole as shown. To do that you're going to need a table saw to rip the pieces to the correct thickness. Glue in place, clamp and let dry. Then mount the pet door.

    The only difference in a steel door is that you use a different saw for cutting the hole. Jig saw with a metal cutting blade works best.

    Your door has an irregular surface

    Every pet door wants to be installed on a flat surface so you'll need to make it flat.

    It's probably a good idea to choose a sturdy metal-framed pet door for this application. The plastic-framed ones are easier to distort if the surface isn't perfectly flat and any distortion may cause the flap to bind and not swing freely.

    The best, neatest way to handle this situation is shown: cut furring strips just thick enough to bring the thinner areas up to the same thickness as the thicker areas.

    Cheater method: Get a self-framing pet door and make each of the four corners the same thickness. Then caulk in the spaces between the corners.

    You've got a screen door

    You could have chosen a simple pet door from the screen mount page and installed it directly through the screen.

    However, this method--which uses a door mount type pet door--is much sturdier.

    Of course, you can also cut down into the base of the door to reduce the step-over for a shorter pet. Don't cut so far that you weaken the door frame though!

    Note that this same approach may be used for a screened-in porch: add framing members to support a door mount pet door.

    You want your pet door in a wall

    Easiest is to purchase a 'self-framing' manual wall mount or electronic wall mount pet door. But if the particular pet door you want is designed for installation in a door you probably still can install it in your wall if you have the skills to frame the wall yourself. We think it best to hire this job out to a contractor. It's a big problem if you cut into electrical or fail to seal the wall properly against weather.

    Adjusting the Magnet Strength on a Patio Pacific Endura Flap


    This is one of the biggest advances in the panel pet door since they were invented in the 1970's!

    Here's the explanation

    Rise is a term invented by Patio Pacific many years ago and generally adopted by the industry. It refers to the height of the flap above the base of the pet door. We at Patio Pacific now think that "step-over" more accurately conveys the meaning to the consumer.

    "Step-Over" is very important to the comfort of your pet. A higher step-over gets the flap up higher for a taller dog which avoids him having to stoop to get through.

    On the other hand, a lower step-over is less to 'step over'.

    In the past, a consumer that wanted a different step-over for any reason had to buy another patio pet door. If you misjudged and got a door with too tall a step-over you were in trouble. Likewise, if you replaced a short pet with a tall pet or vice-versa, you had a problem.

    The adjustable step-over concept greatly increases your flexibility with the pet door. By simply removing the bottom flap assembly and cross pieces with a Phillips head screwdriver, you can rearrange the order of the cross pieces to get the step-over higher or lower.

    This patented feature is only available on pet doors manufactured by Patio Pacific Inc and its licensees.

    These parts were removed from the panel at top with the Phillips head screwdriver shown.

    This dimension is extremely important!

    The top of the flap is ideally placed at least as tall as the pet at the withers (top of the shoulder). Usually, you'll need to add step-over height to get the flap up high enough. For example: Your dog is 22" at the withers and you buy a pet door with a 15" flap. You'd need a 7" step-over to get the top of the flap up high enough. If you had purchased a 19" flap, then you'd only need a 3" step-over.

    Generally, the shorter the step-over the better. As dogs age or become arthritic, it becomes more difficult to manage a higher step-over.

    When installing a pet door in a door or wall, you can choose the step-over dimension. However, for most patio panels the step-over is fixed. The exceptions are the Quick Panel III™ and the Thermo Panel IIIe™ which have a patented user-adjustable step-over.

    Patio Pacific (PP) - FedEx or UPS Ground from San Luis Obispo, CA

    • Doors take about 1-2 business days for assembly before they are shipped.
    • Add additional transit time based on map:

    Patio Pacific Map


    LTL (less-than-truckload) Freight is used when shipments are 120 lb+ or for oversized equipment, which results in a truck with a large container delivering your order. Our freight carrier will contact you once your order makes it to the distribution center closest to the delivery address specified, and set up an appointment time for delivery.

    Pet Pro Supply Co. Free LTL Freight Shipping - Curbside Delivery

    Our standard Free Freight Shipping option for LTL deliveries is curbside, which is to a delivery to a Commercial Address and does not include a liftgate. If your order is to be shipped freight, you will have the option to specify whether the item will be delivered to a Residential, Limited Access, or Commercial address. If there is no option to select a shipping location, then this cost is already included in the price.

    We strongly recommend adding the optional Liftgate for all deliveries to locations without a loading dock or forklift.

    Freight Delivery Locations

    This option specifies whether the delivery location is a Commercial, Residential, Residential Business, or a Limited Access address.

    • Commercial - These addresses are those defined by our freight carriers and/or zoned by local municipalities as commercial sites. Typically these addresses are zoned as commercial real estate or are used exclusively for business. Most commercial sites have tractor-trailer access and a loading dock.
    • Residential - If the address used a residence, select this option. This includes Apartment/Condo complexes and dormitories.
    • Residential Business - Any business being operated from a home, apartment, or other dwelling where people live on the premises is considered to be a Residential Business.
    • Limited Access - Locations where deliveries are restricted, limited, or very far from a distribution center. Examples Include:
      • Place of Worship
      • Restricted Areas - Secure Research Facilities, Military Bases/Installations, Correctional Facilities, Government Buildings
      • Farms, Ranches, and Rural Areas
      • Recreational Areas - Camps, Parks, Fairs, Carnivals, etc.
      • Individual Storage Units
      • Sites - Convention Centers, Construction Sites, Mines
      • Schools and Universities
      • Commercial establishments not open to the walk-in public during normal business hours

    Freight Liftgate

    A liftgate is a hydraulic lift that is attached to the back of a truck that can lower freight to ground level. Freight carriers prevent their drivers from assisting with the unloading of heavy equipment other than using a liftgate to ground level. We highly recommend any delivery address without a loading dock, select this option.

    However, please know that for certain very long items, such as Kennels over 6' in length, a Liftgate will not be able to bring the entire order down to ground level. Please have the necessary manpower available to receive your items with limited delay to the driver. 

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