Cat Doors For Windows

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There are many cases where you’d like to install a cat flap in glass or some other thin, weak material. Think of windows, sidelights, sliding glass doors and French doors.

A cat door window insert is a simple, easy way to make a kitty door for window installation to allow them the freedom to go in and out, without compromising your energy bill.

Cat door for window installation (in a sash or a side sliding window) is a more preferred method if you are not as handy or on a limited budget.  Window doors will typically have an adjustment piece on one or both sides that allows it to vary in tracks it will accommodate. They are held in by tension and take no or minimal tools to install, making them easy to remove if you need.  If you need a cat door for side sliding window installation they install the same way, but will only have one adjustment at the top. Cat windows are also great options to let them in and out of an exterior catio set up. This type of installation can be found in the higher end Thermo Sash or the more economical cat flap for window installation the Ideal Cat Sash

They cat flaps for windows are offered with manual flaps and electronic types to keep out all those unwanted critters!

Cat door for window tracks are also perfect if you are renting since there are no holes to drill!

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. But, you almost certainly have tempered glass and you cannot cut that to install a pet 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.

If you’re more handy-man 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’ve seen it in thick, bullet-proof windows at your bank. While it 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 insuring that the adjustment range is narrow enough to fit the material you’ve chosen.

We have also had customers make their own window pet door for cats by getting a piece of plywood or lexan, making a hole in that and installing a cat door. So they basically fabricated their own panel to put into the track of the sash or side sliding window.