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Fitting Cat Flap in UPVC Door Panel
Cat flaps allow your pet leave and come at their own pace without you having to let him in or out. They can also help keep your cat from having to go to the bathroom inside the house.

Installing a cat flap into the door panel made of upvc is a lot easier than glass doors, however it will require some expertise and the right tools.

Take a measurement of the door

Fitting a cat flap in the door can be a challenge however, as long as you use the correct type of cat flap, take your time and follow the directions provided, it should not prove to be a problem. We will be showing you how to draw the shape, then use the jigsaw to slice the door's area and then finish off the job by securing the cat flap to the door. This will ensure that the flap is in place and also protects the doors from the damage caused by rain and wind.

To determine the size of the cat flap you require, measure your pet's width. This will ensure that the flap is big enough to let your pet enter and leave the house without needing to open and close the door every time, yet small enough to stop the pet from straying too far either way.

Once you have the measurements, you can mark where on the door the template should be placed, typically this is done using an X, however some kits include drawings that show where to drill, if you have one, then attach it to the door and draw a line around the door. If your door has a sill or moulding at the bottom, be sure you leave plenty of space between your cat and these elements.

Use a set square to check that you are cutting correctly and to make sure the hole is in a rectangle shape. Once you are satisfied with the result, you can start removing the rest of the door material. Set the square with a ruler to ensure that you're cutting the material in a proper manner and that the hole is a rectangle shape. Once you are satisfied with the result, you can take the door material off.

Draw a Line

The cat flap is a great way to allow your pet to go out and in without having to worry about them being a nuisance to a visitor, or leaving unwanted gifts in the house. It also prevents draughts, and keeps your home's temperature in check. Fitting a cat flap to your door might seem difficult to those who haven't done it before. Many people call a professional carpenter or joiner to complete the work. While this is definitely an option, it is possible to do the work yourself if you own the appropriate tools and follow the instructions with care.

While this is far simpler to accomplish when using a timber door it is still feasible in uPVC doors, but you must be cautious not to damage the doors since this could end your warranty. The first step in the process is to measure the door, ensuring that it will be able to accommodate the new cat flap. This should be simple enough for the standard uPVC door, but you may require more care if you have an alternative type of door as these can be more difficult to cut into than solid uPVC panels.

The next step is to determine the belly height of your cat. This is the height between the floor and the bottom of your cat's stomach. You'll need to find an area on the door that allows your cat to pass through comfortably. Once you know this, you will need to mark out the area with pencil and a spirit level so that you can ensure that the hole you will make will be a good fit for your cat.

After you have marked the area, it's now time to cut the hole. It is important to be patient and use a jigsaw to ensure that the cuts are smooth and clean, not rough and uneven. This could damage your door. Be sure to wear safety glasses and a dust-proof mask when using the jigsaw, since breathing in the dust could be harmful to your health. Once you have completed the cutting, you'll have to smooth the edges of the hole using sandpaper so that your cat flap will fit easily.

Cut a hole

Installing a cat flap to an existing door panel or double glazing sealed unit is quite difficult. If you are not very proficient in DIY, it is best to hire a professional to do the work for you. A shoddy job might not just be ugly, but also an enigma for security and also allow cold air to enter when the cat is outside, and hot air to escape once inside.

The first thing to do is mark out the location of the hole in the door using an eraser and a spirit level, this will ensure that it is properly placed and runs flush with all the other parts of the door. Make sure to have sandpaper on hand to smooth out any rough edges.

Once the line has been drawn, you can cut the hole with a jigsaw, remember to wear any necessary safety equipment when working with the power tool. If you are worried about the sound produced by the jigsaw, you can purchase a cordless version which is quieter and simpler to use.

You should only remove the material needed to fit the cat flap. A little bit of extra material will be needed to cover the thickness of the the flap but removing more than that can cause problems or damage the doors frame.


A door made of upvc could contain a metal frame or panel that will interfere with the microchip cat flap if this is the case you will need to cut an oversize hole to ensure the metal doesn't come into contact with the wall of the cat flap. If this is done it is important to fill in the oversize gap and render it watertight.

If you are fitting the cat flap onto the frame of a double glazed windows with a metal frame, you will need to speak to a specialist who can provide you with a new glass pane that already has the hole for the cat flap in it. It will be much cheaper to get this done rather than trying to fix the cat flap onto an existing glass pane that was not designed specifically for the purpose.

Install the Flap

Cat flaps allow your pet the freedom to go and come whenever they want and let them relax in the house when they like. If you have a uPVC front door, it may be hard to install a cat flap. This is especially true in the event that you don't own an glass panel that is cut. If you're looking to install a half-glazed uPVC replacement panel, it's possible to add a cat flap. It's not a matter of slicing holes in the door. You'll also need to take a few steps to ensure that it is secure.

A composite door panel typically comprises an flimsy plastic outer layer that is bonded to a soft, insulating polystyrene core. It is essential to be cautious when cutting the material. This kind of door typically includes a template that you can use as a reference for cutting the hole in the door.

After you've marked the position of the hole in your door, it's now time to install the flap itself. You can choose from a range of options, from simple push-button flaps to ones that are microchip-activated and allow only your pet to enter. Whatever type of cat flap you pick it's essential that your cat is able to use the flap without getting stuck outside in the rain.

A circular fitting is superior than a square because circles can be cut more securely into glass. This is because square holes make the glass more susceptible to cracking when a drill is used on it. This is also a safer option, as you won't have to drill into the toughened glass, which could shatter and harm your pet or family members. This is particularly crucial if you have a young or elderly person at home who could be injured by shards of glass.

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