Fitting a Cat Flap It can be difficult to install the flap for your cat however, with the proper instructions it's not that hard. First, determine the height you want the flap to be (on average, belly height). Note this on the door, and use the template provided as a guideline to drill.

If you have a kitten that is still a newborn then gently prop the door slightly open and encourage it to go through. Reward it when it goes through.

Take you can try this out of the door

A cat flap is a great way to allow your pet to move into and out of your home as it wants. This can help keep your cat healthy as it will ensure that it is exercising regularly and also be able to return inside if it is trapped in the elements during bad weather. This will cut down on the time you allow your cat go in and out and also make your home safe by letting you know when it's gone.

However, it is essential that the flap on your cat is fitted correctly to prevent your pet from escaping through it or be pushed through by other animals (e.g. dogs). You should measure the height of your pet's belly as well as the height of the doorway in your home to ensure that the flap is at the correct height. You can adjust the position of your flap if your cat is taller or less than the average.

The next step is to make use of a spirit level to mark the center of the door where you will put the flap. Then, using the markings as an indication, cut out the contour of the flap with the aid of a jigsaw. After you have cut the flap then sand the edges to create smooth surfaces. Drill any holes you need to.

The installation of a cat flap should not take more than two hours. The process is a bit more difficult if you have to install it in the form of a uPVC door or composite one. This is because these doors come in various thicknesses, which can impact the way that holes are cut. We recommend to consult with a professional for your first experience working with glass.

Measure Your Cat

You can save yourself hours of listening to the cat's meows to be let in or out. This is especially useful for cats that are inside during the winter months while you are at work.


If you want to fit a cat flap in your door, it is crucial that you measure your cat before attempting the task. While it may seem to be a simple task, it is essential to measure the right way or your cat will find it difficult to use.

First of all, make sure that your cat is calm and not feeling stressed prior to taking the measurements. You will have to hold your cat in a place in which they cannot move. Also, make sure that the measuring tape is flat and not curved against their body. Holding the measuring tape or ruler against their body from their head to the base of their tail can allow you to get an precise measurement.

Once you've determined your cat's measurements then you can examine the door to determine where to put the flap. It is advisable to position the flap at the height of your cat's stomach as this will help them to pass through it without too much effort. This will also stop the flap from making lots of noise when it swings open and closed.

It is also important to consider the thickness and structure of the uPVC door or composite. While timber doors are of a similar thickness, uPVC and composite doors may differ in their overall structure and this can make the installation of a cat flap more complicated since you have to make sure the hole you make is the proper size for your pet.

You can make use of the template included in the instructions to mark the position of the opening on the door. This will enable you to determine where the hole should be placed and ensure that the template is placed precisely on the door. It is also helpful to utilize a spirit-level to make sure that the template is placed flush against the door.

Cut the Flap

You'll need to cut an opening in the door panel to install your cat flap prior to you can attach it. It's a challenging job, so it's recommended that you hire a professional to assist you if you do not have the skills or experience. You can also consult the instructions that come with the kit to learn how to do it right.

To do this, you will need to take a measurement of the height of your cat or kitten's belly. Use this as an indication point. A good rule of thumb is to place the cat flap about 10-15 centimeters off the ground, as this is approximately the average belly height for cats. This will allow your cat to move through the flap with ease and make it more difficult for other cats or naughty neighbours to enter or exit.

The position of the cat flap on the door with a pencil. If your kit has the template, place it over the door. Utilize the markings on the template to drill holes at every corner. Then, you should be able to cut out the shape of the template and replace it with your cat flap.

You can install your cat flap yourself inside a wood or uPVC door if you are confident using the use of a jigsaw. Be careful not to cut into the vertical rails or mullions of your door. You can use a jigsaw cut the panel into a square or circle, depending on the design of your cat flap. Make sure to take your time and don't make the jigsaw cut faster.

Once the hole is cut then carefully insert the flap of cat food into its new location and make sure that it is securely fixed. If the flap is fitted with screw caps, push them onto the protruding bolts. Once the screws are in place, you can sand any rough edges of the cut and then apply sealant to any gaps to ensure that there are no draughts coming into your home.

Place the Flap

If you have a standard cat flap, you can help your pet to use it by placing a small amount of cat food on the outside of the door. Alternatively you can try pushing the cat through with your hands or a stick. Once your cat is comfortable moving through the flap, it will be capable of walking through the flap whenever it wants. This lets you let it in and out whenever it's wanted.

You can fit an animal flap inside a UPVC or glass door but it's not exactly the same as fitting one into a wood external door since the UPVC doors and some glass doors don't have the same thickness. This could affect the way you cut the opening for the flap and will also affect whether the flap is fitted correctly after it has installed.

The mounting kit may contain a template that outlines where to drill holes. If the kit does not come with a template, you can create one on your own. It's important to not push the jigsaw too hard when cutting, so that it doesn't create a larger than needed hole in your door.

Most cat flaps are rectangular or square in shape, but there are also some which are circular, and they are usually more difficult to install. If you have a circular flap it's essential to make sure the hole is in the right position on your door because if it's not, the cat will not be able to use the flap and could be left in the open all day (or even at night).

Certain cat flaps come with locks that allow you to regulate when your cat enters and leaves. These can be very useful when you're worried about your cat going out at night and then coming back in the darkness, or if you're working all day. Certain locks can be used to lock access or exit, and others can be locked both ways. This is beneficial for sick or older cats who do not want to go outside in bad weather.