Cat Doors For Sliding Glass Doors

A sliding glass door cat flap allows for easy installation of a sliding glass pet door, allowing your cat the freedom to come and go as they please. Most often, a sliding glass cat door will be a patio panel insert with a pre-installed cat door that sits in your sliding door track. Sliding glass pet door cat flaps come in manual and electronic door flap designs, depending on what works best for you. The Pet Door Guys "In the Glass" cat door is another option for a sliding door cat door that mates with your existing lock. This door panel replaces the existing sliding glass door panel from the door frame with a new one that has an energy-efficient Endura Flap Pet Door pre-installed.

Another great product for a pet patio door with an Endura Flap is the Thermo Panel 3e cat door. It features low-E, dual-pane glass, and a sturdy aluminum frame for maximum energy efficiency. This pet door panel comes with a small flap size perfect for cats. This could potentially be used as a dog and cat door for small dogs and cats sharing, just make sure to measure your pet to double-check that the size.

Because cat flaps tend to be less expensive than doggie door flaps, they allow for a less expensive patio pet door. The Ideal Pet Products Fast Fit cat door insert is a great cost-effective option with a four-way locking system that eliminates the need to keep track of a separate closing panel. The rigid, magnetic closure flaps also maintain their sealing values better than most flexible flap pet doors. However, while a rigid flap has good sealing value, staying shut in wind better than a light, flexible flap, doesn't necessarily indicate high insulation value, which has more to do with the quality of the flap material. For extreme weather, the Endura Flap is going to provide the best sealing and insulation value for your home.

Cat patio doors are also available in electronic options to keep critters out. There are magnetic, RFID, and microchip sliding cat doors depending on what works best for your situation. 

Note: For cat sliding glass pet door insert installations shorter than about 75" or taller than about 96", please see "Custom-Unusual -> Custom Dimension Pet Doors" for more choices.

How to install a cat door in a sliding glass door

1. Place the panel of the cat door onto your sliding glass door track and adjust its spring-loaded top along with the thumbscrews.
2. Push it against the interior wall and tighten up the thumbscrews.
3. Now apply weather stripping to provide a seal between the cat door and the sliding glass door.
4. Drill a hole to mount the locking pin on the edge of the sliding door. Also, deep drilling is not advised in order to prevent the glass or the glass seal from damage

Cat Doors For Sliding Glass Doors FAQs

What options do I have for a cat door or a glass door?

If your glass is tempered you will need to replace the glass and have a hole for the cat door cut before the glass is tempered, or you can install a Pet Door Guys "In the Glass" replacement glass unit. These options will require the hiring of a glazier or glass company.

What is the difference between dog doors and cat doors?

Some cat doors have extra features, making them more suitable for cats. These include microchip integration. Lots of times, patio panel pet doors and window pet doors are meant for cats, but can still be used by small dogs. The biggest difference is that doggy doors will be in large sizes to accommodate extra-large breeds. You will not likely find cat doors in x-large sizes.

Are these doors big enough for a dog?

Most likely not. If you still want an electronic option, we recommend the High Tech Pet Door for sliding glass.