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“In the Glass” Sliding Pet Door vs Patio Panel Pet Doors

Sliding door dog doors are becoming increasingly popular among pet owners who want to give their dog the freedom to come and go without making permanent modifications to their home.

Sometimes, a sliding glass door is the only place in your home where you can install a pet door. The tool-free installation makes the process quick and easy so your dog can get straight to using their new door.

border collie running through sliding glass pet door

But not all sliding door dog doors are the same! Here are two different sliding pet door styles for your home:

Patio Panel Sliding Door Pet Door:

A patio panel pet door is an insert with a pre-installed pet door that takes up space in your sliding door track. They install in a matter of minutes and are a great option for a non-permanent installation. There are both aluminum and vinyl frame panels available to match your existing slider.

“In the Glass” Sliding Pet Door:

For a permanent option that mates with your existing sliding door lock, the “In the Glass” pet door replaces an entire slider from your door with a new one that has an Endura Flap pet door pre-installed.

We’re here to walk you through the differences between these two sliding pet door options so you can decide which one is best for you.

Patio Panel Pet Doors


dog walking through sliding door pet door

Quick Installation:

Installing a sliding door dog door insert takes only a few minutes. All you need to do is place the panel in your sliding door track and loosen the screws at the top of the panel to raise it into the upper track. The adjustable height ranges allow for installation in many different track heights (you can purchase a height extension piece for taller sliding doors). Patio panels can be removed just as quickly, making them the perfect option for rental and vacation homes, or to easily take with you if you move.

If you have a monorail sliding door track, check out the monorail adapter for a seamless installation.

Weather Resistance:

The Endura Flap Thermo Panel 3e is the best patio panel pet door with dual-pane, Lo-E glass, and a sturdy aluminum frame for superior insulation. Read about dual-pane vs single-pane glass to learn more.You can also install the Draft Stopper, an adhesive weather-strip that improves insulation for any sliding pet door make and model.

For a super-insulated dog door for sliding glass doors check out the Severe Weather Vinyl Sliding Glass Dog Door, featuring a double flap for added weather resistance. This panel is made to fit perfectly into a vinyl-framed sliding door track.

Take a look at our full list of sliding glass pet door patio panels for more options.


One concern that comes up with patio panels is security. A patio pet door for sliding glass doors can’t be removed from the outside, and every purchase comes with a track lock or pin lock to secure the panel into the sliding door track. You can also add a C-Clamp lock or Charley Bar for added security. If you would like a dog door for sliding glass doors that mates with your existing lock, the Pet Door Guys “In the Glass” option would be best for you!

Pet Door Guys “In the Glass”


beagle looking out sliding glass pet door

Secure Installation:

The Pet Door Guys In Glass Pet Door features the same insulating Endura Flap Pet Door as the patio panels, but instead of a single panel, you get an entire pane of glass to replace half of your slider. The installation process is similar to having a shattered pane of glass replaced, only the new pane will have a pet door pre-installed!

You’ll need to contact your local glazier to measure your sliding glass door. Once you have those measurements you’ll fill out an “In the Glass” order form so the manufacturer can get to work making your completely customized sliding glass dog door.

Maximum Weather Resistance:

Since the “In the Glass” pet door replaces an existing pane of glass, there are no gaps to let heat and cold into your home. The Endura Flap pet door is also the best on the market for weather resistance and will stay sealed in extreme heat, wind, and cold.


The “In the Glass” pet door functions with your existing sliding door lock, so it is the most secure sliding door pet door option.

This sliding glass door with a dog door built in also allows you to maintain full use of your slider. Whereas the width of a patio panel cuts into the width of the door track—reducing the space left when the slider is opened—the “In the Glass” door maintains the look and feel of your original sliding door.

pet door guys in the glass pet door


To summarize, patio panels are the way to go for a quick, non-permanent installation. For a sliding pet door that mates with your existing lock and provides maximum insulation, the “In the Glass” pet door is the perfect option. Replacing the entire pane of glass with the dual-pane “In the Glass” piece also ensures maximum weather resistance, no need for patio panel weather stripping.

Once you’ve decided on the perfect sliding glass pet door for your home, check out our pet measurement guide to choose the perfect size for your furry friend!

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