• Custom-made in glass dog door for sliding glass doors, French doors, and sidelights (Recommend professional glazier for measurement and installation  )
• Dual-pane, argon gas-filled glass with pre-installed Endura Flap for energy efficiency
• Maintains existing lock and security system for added peace of mind
• Professional appearance for a seamless integration with your home's design
• Four sizes available to accommodate cats, small dogs, and large dogs
• Maximum glass size is 34" wide x 92" high 
• Item only available in the lower 48 United States
• We'll need more information to complete your order.  In your Order Confirmation email, there is an button with "."  Click on it to answer questions about your existing glass and pet(s).

• Innovative solution: Replaces one panel of your dual-pane glass door with a custom-made unit featuring a built-in pet door
  
• Energy efficiency: The dual-pane, argon gas-filled glass and insulating Endura Flap help reduce energy costs by providing superior insulation
• Security without compromise: This pet door solution allows you to keep your existing lock and security system, ensuring the safety of your home
• Perfect integration: The professionally designed appearance of the sliding glass pet door system provides a cleaner finish compared to traditional pet door inserts
• Versatile sizing: Choose from four different flap sizes and variable magnet strength to fit cats, small dogs, and large dogs comfortably
• Customizable options: Select from clear glass or Low-E glass for increased insulation, based on your needs;
• Simple installation: Easy-to-follow ordering and installation process, requiring assistance from a professional glazier for precise measurements and glass replacement
• Durable materials: The pet door frame is made of vinyl, with a clear, flexible, insulated Engage Polyolefin flap for long-lasting use
• Award-winning design: The Endura Flap pet door system has been recognized for its innovative design and superior sealing and wind resistance properties
• Warranty and support: The pet door comes with a 15-year flap warranty and a 10-year warranty period for your peace of mind

Ordering Instructions

Step 1: Prior to proceeding, thoroughly read the contents of this product listing and complete rough measurement estimates of your glass pane and pets to ensure this glass replacement with pet door will be the correct solution for your home and pets (short-legged pets may find the step-over too tall as the step-over will elevate your pet door 3 ¾ inches more off the ground).  If you have any questions about sizing, please reach out to our Customer Service at  or by phone (800) 826-2871.

Step 2: Hire a glazier to measure the width, height, and thickness of the entire pane of glass that the custom-made unit will replace.  They should review the for more specific instructions. Ask your glazier to determine if you have Low-E, clear glass, or tinted glass.  They may be able to help you fill out the order form.

Note: It is crucial that these dimensions are accurate since there are no standard sizes.  All Pet Door Guys In the Glass units are custom-made which means they are not returnable and are non-refundable.

Warning: Thermo-Tru brand sliding glass doors require a specialized glazier for installation. Make sure you do not have a Therma-Tru pet door before purchasing. 

Step 3: Place your order on the website and pay for your pet door.  Exact pane dimensions are not entered when you are choosing from the dropdown options on the website.  Standard glass is up to 34" wide x 76" tall and oversize glass is up to 34" wide and from 76” to 92" tall.  Once you place your order, you’ll receive an order confirmation email with an orange "Finish Your Order" button to take you to the to provide the exact measurements from your glazier (explained in the next step).

Step 4: Complete the order form.

A. Clearly write or type the shipping address in the desginated space.  Standard size glass (up to 34" wide x 76" high) can be shipped to a residence and oversize glass (up to 34" wide and from 76 to 92" high) must be shipped to a business (non-residential) address.  

B. Write in the Quantity. Based on the glass information provided by your glazier, complete the Glass sections.  Select Glass Thickness.  Clearly write or type in the Width and Height of your actual glass (not visible glass) and lastly, select the Glass Type for your custom pane.

Note:  The minimum glass size allowed can be determined by your desired flap size:  add 6" to your desired flap size’s width and add 7” to it’s height.

C. Complete the remaining sections of the form.  Select flap size (reference this ), frame color, and Pet Door Opening. For the Pet Door Opening review the .  The ‘X’ represents where the pet door is placed as if you are standing outside your home and looking inside. 

Note: Due to the pet door frame thickness, if the sliding glass door slides inside the fixed/non-operational panel, the pet door must be installed on the sliding glass door.  If the slider slides outside the fixed/non-operational panel, the pet door must be placed on the fixed piece of glass.  

D. Email the to [email protected]. Your order will be on hold until we receive this information. Please refer to our full set of. 

Please note that this door may take 4-5 weeks to build once the order form is approved. Additionally, allow transit time for delivery.  You will receive a tracking number and carrier information once your new pet door ships so you can schedule the installation.

Step 5: Once the door has arrived, schedule the glazier who took the initial measurements to come back for installation. They will remove the original pane and install the new In the Glass pet door into the sliding glass door frame.

We recommend keeping your sliding glass doors original glass should you choose to reverse the process in the future. You can reuse the box your new unit shipped in to store the original piece of glass.

Important Information

• All orders are final sale, non-returnable.
• Can only be shipped within the lower 48 United States. No international, AK, or HI shipping is available.
• Allow 4 weeks plus transit time for delivery.  
• You are responsible for payment to the glass shop for the measurement and installation. This cost can range from about $120-$200.
• Uses your existing sliding glass door frame  by replacing one of the panes of glass with one that has a doggy door.  
• Does not offer the double flap option for the Endura Flap, only the single flap.
• Approximate your actual glass size right now by measuring the "daylight" dimension (just what you can see) and adding 3/4" in both dimensions.
• Minimum glass size allowed  can be determined by flap size: width plus 6" and flap height plus 7".
• Manufactured near sea level. If you live in a higher elevation (above 2,000 feet), capillary tubes can be installed. We recommend that you consult with a glazier. Please let us know if you need these to be added.