Cat Doors For Windows

Cat doors for windows are the perfect solution to installing a cat flap without cutting into your door or wall. Give your cat the ultimate freedom to come and go, freeing up your time spent playing 'doorman' to them. Select from a wide range of brands and pet door styles to match your insulation, security, and price range needs.

Cat Door Window Inserts

A cat door window insert is a simple, easy way to get a kitty door in your window and allow them the freedom to go in and out. Sash windows slide up and down, while horizontal windows slide left and right. We have options for both!

A sash window pet door installation is a more preferred method if you are not as handy or on a limited budget. Sash window doors will typically have an adjustment range on one or both sides that allows it to fit into a variety of tracks. They are held in by tension and take little or no tools to install, making them easy to remove if you need to. This kind of installation can be found in the higher-end Thermo Sash or the more economical cat flap for window installation the Ideal Cat Sash from Ideal Pet Products.

If you need a cat door for horizontal sliding window installation, they install the same way, but will only have one adjustment at the top. Like the sashes, horizontal window cat doors can be found in the higher-end Thermo Panel and the more economical Whiskers & Windows or PetSafe.

Our wide selection of cat flaps for windows features high-quality manual flaps and even extra-large cat doors! A cat door for windows is also perfect if you are renting since there are no holes to drill and all panels are easy installation!

Creative Alternatives

If you’re more DIY inclined, you might consider replacing the glass yourself with a thin piece of plywood or, better, Lexan (generic name polycarbonate) which looks just like glass. You may have seen it in thick, bullet-proof windows at your bank. While it still looks like glass, you can drill or saw it like wood. Note that if you take the plywood or polycarbonate approach, you’ll probably want to choose from the cat flaps for doors page just to ensure that the adjustment range is narrow enough to fit the material you’ve chosen.

We have also had customers make their own pet door insert for cats by getting a piece of plywood or Lexan, making a hole in that and installing a cat door that way. So they basically fabricated their own panel to put into the track of the sash or side sliding window. If you go this route, be sure to include some weather stripping for extra insulation!

Wondering if a dog can use the window cat door? Maybe a very small dog could use one of these flaps, but we recommend getting a pet door or dog door based off the largest size pet! Take a look at our larger selection of pet doors for windows.

How to install a Cat Door through glass

It’s true that if you have plate glass, you can simply cut a hole (a circle, actually) and install a number of the cat doors in this section through that hole. They’re designed to spread the forces out to avoid breaking the glass. However, most windows are tempered glass and you cannot cut that to install a window door. If you try, it will shatter! However, your local glass shop can remove the piece of glass in question and replace it with a new piece that has the hole pre-cut prior to tempering. Then it’s a simple matter to install the cat flap.

1. Consult with a local glazier to make sure your window can be cut. This is especially important if your window contains either a dual-pane or tempered glass.
2. Measure your cat from feet to shoulder to get a correct flap size.
3. Choose from cat flap doors that have the ability to be installed directly into a window. You can contact our pet door experts for help!
4. Order the desired cat door with PetDoors.com
5. If your window has a plate glass, then you can simply cut a hole (a circle, actually) and install a cat door yourself. But in the case of tempered glass, a local glass shop can provide you with a new piece that has the hole pre-cut prior to tempering, which makes it easy to install the cat flap.

Read our blog post if you are looking to Install a Cat Door in a Hollow Core Door.

Can I put a cat door in a window?

Yes, you can put a cat door in a window. An adjustable cat door for window is a great option, because you can adjust the panel with a built-in pet door to fit the exact width or height of your window.

Can you put a pet door in a window? For both dogs and cats?

Yes, you can put a pet door in a window. An adjustable cat door for the window is a great option because you can adjust the panel with a built-in pet door to fit the exact width or height of your window.

How do you lock a window with a cat door?

To lock a window with an adjustable cat door for window, a Charley bar or a wooden dowel in the track are both great options.

How do you make a cat door in a window?

An adjustable cat door for window is made by installing a pet door into an aluminum or vinyl panel that can be inserted into your window track.