Dragon Custom Double Flap Pet Door for Aluminum Sliders
- Custom sliding door panel with built-in double flap pet door
- Sturdy aluminum framing matches aluminum-framed sliding glass doors
- Custom height ranges allow for the perfect fit in your slider
- Energy-efficient double flaps keep your home insulated
- Quick and easy installation in sliding door track without any permanent alterations
- Custom orders are made to your specifications and are non-returnable
- Approximately three weeks to build your custom panel pet door
- We'll need more information to complete your order. In your Order Confirmation email, there will be an Orange button with "Finish Your Order." Click on it to enter to answer questions to finish your order.
Product Details
The Dragon Custom Double Flap Sliding Glass Dog Door Insert for Aluminum Sliding Glass Doors complements your existing sliding door frame. This removable panel with a built-in, double-flap Dragon pet door is an economically friendly solution for installing a pet door in a sliding glass door. Available in three custom height ranges, this panel is made to fit your exact slider height. With a spring-loaded design, the Dragon aluminum patio panel installs in a matter of minutes. You can also remove the panel in a matter of minutes, making it the ideal choice for vacation homes and rental properties.
Need a single flap? Check out the Dragon Custom Single Flap Pet Door for Aluminum Sliders. Already have a Dragon pet door? See which replacement flap fits your door.
Features:
- High-quality aluminum frame to match your aluminum sliding door
- Panel is custom-made to fit your sliding door track height perfectly
- Tough polyolefin elastomer flap material keeps home insulated (also available in a single flap for mild climates)
- Single-pane, tempered glass ideal for moderate climates
- Double-flap Dragon Pet Door insulates your home
- Installs easily with the simple spring-loaded design
- Includes a C-Clamp lock to hold the panel in place (you can install a Charley Bar for additional security)
- Extruded aluminum frame made for sliding glass door tracks at least 1" thick (for vinyl sliding doors, see the Dragon Pet Door for Vinyl Sliders)
- Comes with a sturdy, black locking cover to block access when needed
- Designed for recessed tracks, see the monorail adapter page if you have a monorail track
Benefits:
- Quick and low-impact installation does not require any permanent alterations to your sliding glass door
- Easily removable, perfect for temporary or seasonal installation
- Ability to upgrade from single flap to double flap using an additional Dragon flap
Size Chart
- Medium 7 1/16"w x 13 1/16"h
- Large 9 3/8"w x 16 9/16"h
Flap Dimensions:
7 1/16"w x 13 1/16"h
The entry way your dog goes through.Step Over Range
3 7/8”
Distance from the bottom of the flap to the floor you pet must step over to enter the pet door.
Overall Panel Width
13 5/8"
How wide the panel is overall.Flap Dimensions:
9 3/8"w x 16 9/16"h
The entry way your dog goes through.Step Over Range
3 7/8”
Distance from the bottom of the flap to the floor you pet must step over to enter the pet door. Overall Panel Width
15 1/4"
How wide the panel is overall.| Flap Size | Flap Dimensions | Step Over | Overall Panel Width | Recommended Pet Height* |
|---|---|---|---|---|
| Small | Coming 2023 | Coming 2023 | Coming 2023 | Coming 2023 |
| Medium | 7 1/16"w x 13 1/16"h | 3 7/8" | 13 5/8" | 11" - 16" |
| Large | 9 3/8"w x 16 9/16"h | 3 7/8" | 15 1/4" | 11" - 22" |
Choose the range that your track height falls into and when ordered you will be asked to give the exact height of your slider track inside very top to very bottom. In each case you will have 3" of height adjustment with the height you specify approximately in the middle of that range. The ranges are:
- Under 74 3⁄4"
- Between 80 1⁄4" – 93 1⁄4"
- Over 96 1⁄4"
The panels have a 3-inch spring-loaded height adjustment, so if you request a 40" panel, the panel you receive will adjust from 38" to 41" inches.
Installation Instructions
Difficulty
Easy
Steps
04
Time Required
0.5 Hours
Sections
03
Flags
02
Parts
- 1 Panel Pet Door with a Pre-Installed Dragon Pet Door
- 1 Foam Weather Strip Seal
- 1 C-Clamp Lock
- 1 Locking Cover
Tools
- Flathead Screwdriver
Please read instructions & notes thoroughly before installation.
One-Piece Panel
Step 1 Adjust the Top Piece
- Loosen the height adjustment locks at the top of the panel. This allows the spring mechanism to move freely up and down.
Step 2 Test-Fit the Panel
- Insert the panel into the top track of your framing, push the panel into the spring mechanism and swing the bottom of the panel up and over the threshold into the rail at the bottom.
- If you can't quite clear the track, try swinging in from the outside as the outside track wall may be shorter.
Step 3 Apply the Weather Stripping
- Once you have confirmed the panel fits, remove the panel from the track and lay it on its side.
- 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.
- Use scissors to trim the strip to fit the length of your panel.
- Flip your panel around to apply on the other side.
Step 4 Install the Panel
- Place the panel back into the sliding glass door, then tighten the height adjustment locks to lock it in place. Installation complete!
Difficulty
Easy
Steps
08
Time Required
0.5 Hours
Sections
03
Flags
04
Parts
- 1 Panel Pet Door with a Pre-Installed Dragon Pet Door
- 1 Foam Weather Strip Seal
- 1 C-Clamp Lock
- 1 Locking Cover
- 4 Flathead Screws
- Flathead screwdriver
Tools
- Flathead Screwdriver
- Philips-head screwdriver (for sectional)
Please read instructions & notes thoroughly before installation.
Sectional Panel
SECTIONAL ASSEMBLY
Step 1 Loosen the Screws
- With a Phillips-head screwdriver, loosen the top two screws of the Dragon frame to make room for the glass section to fit inside.
Step 2 Connect the Sections
- Slide the flap section into the glass section. Make sure the locking cover is on the same side as the height adjustment locks on the glass section.
- Keep adjusting the flap section until it is fully flush with the glass section.
- Alternatively, pick up the panel and tap it on the ground on a soft surface.
Step 3 Fasten the Sections Together
- Fasten the sections by screwing in two connector screws each into the section connectors on both sides with the provided flat head screwdriver.
- Tighten down all eight connector screws.
Step 4 Secure the Pet Door Frame
- Retighten the two Dragon frame screws until the Dragon frames are flush with the glass section.
- Press the nut into the frame to keep it from rotating.
- Proceed with the regular Dragon panel Instructions below.
Step 5 Adjust the Top Piece
- Loosen the height adjustment locks at the top of the panel. This allows the spring mechanism to move freely up and down.
Step 6 Test-Fit the Panel
- Insert the panel into the top track of your framing, push the panel into the spring mechanism and swing the bottom of the panel up and over the threshold into the rail at the bottom.
- If you can't quite clear the track, try swinging in from the outside as the outside track wall may be shorter.
Step 7 Apply the Weather Stripping
- Once you have confirmed the panel fits, remove the panel from the track and lay it on its side.
- 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.
- Use scissors to trim the strip to fit the length of your panel.
- Flip your panel around to apply on the other side.
Step 8 Install the Panel
- Place the panel back into the sliding glass door, then tighten the height adjustment locks to lock it in place. Installation complete!
Dragon Locking Details
Since you cannot lock your sliding glass door to your panel pet door, we have provided you with an alternative locking method to secure your home.
Installing the Clamp Lock
- This clamp has a screw that tightens by hand to prevent the sliding door from moving beyond the clamp’s placement.
- For doors manufactured with the glass slider on the inside track, the lock can usually be installed on the door’s raised track.
Locking the Flap
- The Dragon Pet Door comes with a secure locking cover to block access to the flap when needed.
- The locking cover is a great perfect for keeping pets inside at night, or for blocking access to the flap when you're away.
Alternative Locking Method
- A great alternative to locking your sliding glass door is a Charley bar or dowel in the track.
- Both work off the same concept—they block the slider from opening. When engaged you cannot pull the sliding door away from the pet door panel.
FREQUENTLY ASKED QUESTIONS
What if my panel is slightly too tall?
You can trim up to 3/4” off the spring- loaded adjustment piece at the top. This can be done by removing the adjustment pieces with a #2 Phillips head screwdriver and cutting down the flanges. Be careful not to cut too low or you will not be able to put the top back on.
The dark area marks where you can trim:
What if my panel is slightly too short?
We offer height extensions that will add 3/4” to the top of the panel that you slide into the channel at the top. These are made from the same aluminum as the panel so you can match the color.
You can also make your own extension out of nominal 1” wood (which is 3/4” thick), such as a 1x3, if you need more than 3/4" in height. Cut it to the same width as the panel and slide it into the channel at the top. Paint the wood to match your frame color. If the extension makes the panel feel unstable, you can secure it with screws.
What if the panel is wobbling slightly back and forth?
If your track is wider than 1” you can use small wooden shims or extra weather-stripping to fill in the gap inside the top and bottom tracks. By placing the material inside the tracks you won't be able to see it, but it will stabilize the panel.
FAQ
|
What's the difference between the single flap and the double flap? The double flap dragon option provides increased insulation against the cold. Both dog door for sliding glass door options have magnets on the flap to keep the door sealed in wind. |
|
I want to get the large pet door for my dog, but I am concerned about a person fitting through it. All Dragon sliding glass dog door inserts come with a locking cover. This cover can be used to keep you doggy in. It also can be used to keep intruders from entering your home. It slides into the interior frame. |
|
How do I know what size to get for my pet? The best sliding glass dog door size depends on your dog's height and width. Here's a pet measurement guide to help you out. When installing the pet door you want it to clear the top of your dog's back by 1-2 inches, minimum. Make sure the step-over is less than 1/3 of your dog's height. Lastly, you want the width of the door to be big enough to allow your pet to go through without touching the sides, about an inch extra. |
|
Are replacement flaps available? Yes, you can buy Dragon replacement flaps. |
|
Is this dog door for sliding glass door good for a rental home? Yes, the Dragon aluminum sliding door panel is an excellent temporary dog door sliding door option. |
|
How thick does my track need to be? To install the Dragon aluminum sliding patio doors, your track needs to be at least 1" thick. Most aluminum sliding doors have a track right around 1" thick. Make sure to measure to ensure the proper fit. |
Warranty
Dragon Pet Doors One Year Warranty
Dragon Pet Doors have a one-year warranty for normal wear and tear and manufacturing defects.
Customer Reviews
United StatesCustom made for you (staff review)
Can't find a pet door panel to fit your sliding glass door track? With Dragon you can have one custom made to fit your sliding glass door. The double Dragon pet door flaps helps with insulation.
United StatesAnother Great Custom Pet Door Option (Staff Review)
Before this panel, anyone with a usual slider height had to fork out the money for a luxury pet door like the Endura Flap. With this option from Dragon Pet Door, you can now have a well-fitting pet door without overspending for more than you need. The double flap door also offers more insulation against cold weather than the single flap.
Double Flaps Improve Insulation (Staff Review)
This is a great door for more moderate climates. The double flaps add some nice insulation value and the panel is super easy to install. Nice to have custom height options to accommodate sliders of varying heights.
Size Chart
- Medium 7 1/16"w x 13 1/16"h
- Large 9 3/8"w x 16 9/16"h
Flap Dimensions:
7 1/16"w x 13 1/16"h
The entry way your dog goes through.Step Over Range
3 7/8”
Distance from the bottom of the flap to the floor you pet must step over to enter the pet door. Overall Panel Width
13 5/8"
How wide the panel is overall.Flap Dimensions:
9 3/8"w x 16 9/16"h
The entry way your dog goes through.Step Over Range
3 7/8”
Distance from the bottom of the flap to the floor you pet must step over to enter the pet door. Overall Panel Width
15 1/4"
How wide the panel is overall.| Flap Size | Flap Dimensions | Step Over | Overall Panel Width | Recommended Pet Height* |
|---|---|---|---|---|
| Small | Coming 2023 | Coming 2023 | Coming 2023 | Coming 2023 |
| Medium | 7 1/16"w x 13 1/16"h | 3 7/8" | 13 5/8" | 11" - 16" |
| Large | 9 3/8"w x 16 9/16"h | 3 7/8" | 15 1/4" | 11" - 22" |
Choose the range that your track height falls into and when ordered you will be asked to give the exact height of your slider track inside very top to very bottom. In each case you will have 3" of height adjustment with the height you specify approximately in the middle of that range. The ranges are:
- Under 74 3⁄4"
- Between 80 1⁄4" – 93 1⁄4"
- Over 96 1⁄4"
The panels have a 3-inch spring-loaded height adjustment, so if you request a 40" panel, the panel you receive will adjust from 38" to 41" inches.
Difficulty
Easy
Steps
04
Time Required
0.5 Hours
Sections
03
Flags
02
Parts
- 1 Panel Pet Door with a Pre-Installed Dragon Pet Door
- 1 Foam Weather Strip Seal
- 1 C-Clamp Lock
- 1 Locking Cover
Tools
- Flathead Screwdriver
Please read instructions & notes thoroughly before installation.
One-Piece Panel
Step 1 Adjust the Top Piece
- Loosen the height adjustment locks at the top of the panel. This allows the spring mechanism to move freely up and down.
Step 2 Test-Fit the Panel
- Insert the panel into the top track of your framing, push the panel into the spring mechanism and swing the bottom of the panel up and over the threshold into the rail at the bottom.
- If you can't quite clear the track, try swinging in from the outside as the outside track wall may be shorter.
Step 3 Apply the Weather Stripping
- Once you have confirmed the panel fits, remove the panel from the track and lay it on its side.
- 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.
- Use scissors to trim the strip to fit the length of your panel.
- Flip your panel around to apply on the other side.
Step 4 Install the Panel
- Place the panel back into the sliding glass door, then tighten the height adjustment locks to lock it in place. Installation complete!
Difficulty
Easy
Steps
08
Time Required
0.5 Hours
Sections
03
Flags
04
Parts
- 1 Panel Pet Door with a Pre-Installed Dragon Pet Door
- 1 Foam Weather Strip Seal
- 1 C-Clamp Lock
- 1 Locking Cover
- 4 Flathead Screws
- Flathead screwdriver
Tools
- Flathead Screwdriver
- Philips-head screwdriver (for sectional)
Please read instructions & notes thoroughly before installation.
Sectional Panel
SECTIONAL ASSEMBLY
Step 1 Loosen the Screws
- With a Phillips-head screwdriver, loosen the top two screws of the Dragon frame to make room for the glass section to fit inside.
Step 2 Connect the Sections
- Slide the flap section into the glass section. Make sure the locking cover is on the same side as the height adjustment locks on the glass section.
- Keep adjusting the flap section until it is fully flush with the glass section.
- Alternatively, pick up the panel and tap it on the ground on a soft surface.
Step 3 Fasten the Sections Together
- Fasten the sections by screwing in two connector screws each into the section connectors on both sides with the provided flat head screwdriver.
- Tighten down all eight connector screws.
Step 4 Secure the Pet Door Frame
- Retighten the two Dragon frame screws until the Dragon frames are flush with the glass section.
- Press the nut into the frame to keep it from rotating.
- Proceed with the regular Dragon panel Instructions below.
Step 5 Adjust the Top Piece
- Loosen the height adjustment locks at the top of the panel. This allows the spring mechanism to move freely up and down.
Step 6 Test-Fit the Panel
- Insert the panel into the top track of your framing, push the panel into the spring mechanism and swing the bottom of the panel up and over the threshold into the rail at the bottom.
- If you can't quite clear the track, try swinging in from the outside as the outside track wall may be shorter.
Step 7 Apply the Weather Stripping
- Once you have confirmed the panel fits, remove the panel from the track and lay it on its side.
- 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.
- Use scissors to trim the strip to fit the length of your panel.
- Flip your panel around to apply on the other side.
Step 8 Install the Panel
- Place the panel back into the sliding glass door, then tighten the height adjustment locks to lock it in place. Installation complete!
Dragon Locking Details
Since you cannot lock your sliding glass door to your panel pet door, we have provided you with an alternative locking method to secure your home.
Installing the Clamp Lock
- This clamp has a screw that tightens by hand to prevent the sliding door from moving beyond the clamp’s placement.
- For doors manufactured with the glass slider on the inside track, the lock can usually be installed on the door’s raised track.
Locking the Flap
- The Dragon Pet Door comes with a secure locking cover to block access to the flap when needed.
- The locking cover is a great perfect for keeping pets inside at night, or for blocking access to the flap when you're away.
Alternative Locking Method
- A great alternative to locking your sliding glass door is a Charley bar or dowel in the track.
- Both work off the same concept—they block the slider from opening. When engaged you cannot pull the sliding door away from the pet door panel.
FREQUENTLY ASKED QUESTIONS
What if my panel is slightly too tall?
You can trim up to 3/4” off the spring- loaded adjustment piece at the top. This can be done by removing the adjustment pieces with a #2 Phillips head screwdriver and cutting down the flanges. Be careful not to cut too low or you will not be able to put the top back on.
The dark area marks where you can trim:
What if my panel is slightly too short?
We offer height extensions that will add 3/4” to the top of the panel that you slide into the channel at the top. These are made from the same aluminum as the panel so you can match the color.
You can also make your own extension out of nominal 1” wood (which is 3/4” thick), such as a 1x3, if you need more than 3/4" in height. Cut it to the same width as the panel and slide it into the channel at the top. Paint the wood to match your frame color. If the extension makes the panel feel unstable, you can secure it with screws.
What if the panel is wobbling slightly back and forth?
If your track is wider than 1” you can use small wooden shims or extra weather-stripping to fill in the gap inside the top and bottom tracks. By placing the material inside the tracks you won't be able to see it, but it will stabilize the panel.
FAQ
|
What's the difference between the single flap and the double flap? The double flap dragon option provides increased insulation against the cold. Both dog door for sliding glass door options have magnets on the flap to keep the door sealed in wind. |
|
I want to get the large pet door for my dog, but I am concerned about a person fitting through it. All Dragon sliding glass dog door inserts come with a locking cover. This cover can be used to keep you doggy in. It also can be used to keep intruders from entering your home. It slides into the interior frame. |
|
How do I know what size to get for my pet? The best sliding glass dog door size depends on your dog's height and width. Here's a pet measurement guide to help you out. When installing the pet door you want it to clear the top of your dog's back by 1-2 inches, minimum. Make sure the step-over is less than 1/3 of your dog's height. Lastly, you want the width of the door to be big enough to allow your pet to go through without touching the sides, about an inch extra. |
|
Are replacement flaps available? Yes, you can buy Dragon replacement flaps. |
|
Is this dog door for sliding glass door good for a rental home? Yes, the Dragon aluminum sliding door panel is an excellent temporary dog door sliding door option. |
|
How thick does my track need to be? To install the Dragon aluminum sliding patio doors, your track needs to be at least 1" thick. Most aluminum sliding doors have a track right around 1" thick. Make sure to measure to ensure the proper fit. |
Warranty
Dragon Pet Doors One Year Warranty
Dragon Pet Doors have a one-year warranty for normal wear and tear and manufacturing defects.
United StatesCustom made for you (staff review)
Can't find a pet door panel to fit your sliding glass door track? With Dragon you can have one custom made to fit your sliding glass door. The double Dragon pet door flaps helps with insulation.
United StatesAnother Great Custom Pet Door Option (Staff Review)
Before this panel, anyone with a usual slider height had to fork out the money for a luxury pet door like the Endura Flap. With this option from Dragon Pet Door, you can now have a well-fitting pet door without overspending for more than you need. The double flap door also offers more insulation against cold weather than the single flap.
Double Flaps Improve Insulation (Staff Review)
This is a great door for more moderate climates. The double flaps add some nice insulation value and the panel is super easy to install. Nice to have custom height options to accommodate sliders of varying heights.
