Fitting a Cat Flap

· 6 min read
Fitting a Cat Flap

Getting a cat flap fitted inside your home can be a major step for any pet owner. There are numerous options to you, regardless of whether your cat is getting older and needs extra security, or you have kittens who need to be vetted.

It can be a bit daunting for people who aren't experts in installing a cat flap, but with the proper guidelines, it's easy. Preparation, planning and accuracy are the key to success.

Select the Right Door, or Windows

There are a myriad of kinds of cat flaps, some of which have locks that can be used to stop your pet from going out or in, while others have modern features such as microchips or a door entry system. It's important to think about how easy it will be to teach your cat to use the flap, before you purchase and install one.

Depending on the design of your home, it's generally best to put the cat flap in the form of a door or window that opens to a sheltered area of the garden, so that your cat will feel secure going into and out of the house. If possible this will also allow them a route back in case they are chased by a cat or by humans who are intent to hurt them.

You can install an egress flap inside a uPVC door or glass window however it's not as easy as putting one in the door made of wood. It's because uPVC or composite doors are available in different thicknesses. This could affect the how holes are cut and the material you put into.

To avoid costly mistakes It is recommended that you consult a professional glazier prior to installing the flap on a glass-fronted doors. If you're installing the flap on a wooden door, start by introducing your cat to it before you fit it, so that they get used to its shape and size, and explore it from every angle.

Measure Your Cat's Belly

In order to install the right cat flap that's suitable for your pet, you'll need to measure your cat. This will allow you to ensure that the cat flap is placed at the right height on the window or door, and also that it's large enough for him to get in and out easily.

Place your pet on its back and gently move your fingers along their belly. Look for any squishy fat pads which may be visible around their lower back, face or limbs. The extra padding offers your pet with protection and allows them to move more easily, particularly when performing the many acrobatics that felines are known for.

You can also make use of your pet's weight to gauge how big an opening you require. If your cat weighs up to 5Kg in weight for instance that's a 14x12cm cat flap opening is advised.

Measure your windows or doors

As the name suggests the cat flap is designed to be affixed to the door, and offers a way for your pet to go in or out at any time it wishes. They are usually made of aluminum or plastic and sit in the centre of the door. They have the possibility of a swinging door that opens by pressing lightly on either side. They are available with locking options that offer added security, so your cat cannot simply traverse the door from outside.

A window is a common location for a cat's flap, and they're easy enough to fit, although they usually need to be placed high up as it's difficult for cats and dogs to reach them otherwise. If the window is too high to be used as a cat flap, ramps, steps, or specially constructed stairs can be used to aid the animal in accessing it.

cat flap installation cost Repair My Windows And Doors  is possible to insert the cat flap onto the brick wall, however it is not recommended for people who aren't experienced in brickwork. This could weaken the structure of the wall. It is essential to ensure that there aren't any cables and pipes within the wall before you begin. If they are, a hole needs to be made for them. This is something that you should always seek professional advice on. Wearing protective glasses or a dust mask can ensure that you don't breathe in the sawdust that is created when cutting through your walls.

Choose the Cat Flap that is right for you.

There are numerous cat flaps on the market and they all have different features. Some have security options such as magnetic locks or microchip recognition to stop unauthorized entry and prevent your pet from allowing pets or friends into the home. Some have insulation as well as weatherproof seals to keep out draughts and moisture.

There are different sizes available depending on the breed and size of your pet. Certain cat flaps are available in rectangular shapes, whereas others are square or circular. The best type of cat flap is determined by the space you have available and the type of window or door you want to attach it to.

Also, think about the opening mechanism that your cat flap is likely to have. A simple plastic or aluminium swing-out door is one alternative and is usually the cheapest. But, it will not keep other animals or cats from entering and you may let draughts through as well.

It's time to install your cat flap. Begin by marking the belly height on the door using your ruler. Use a spirit level to make sure that the line is straight against the door and not too low. Utilize your spirit level to draw a template for the flap for cats. Then, use a saw to cut out the outline of the door. Once you are satisfied with the result finish sanding the edges and drill through the pencil markings to make holes for screws.

Make the Tools

It's important to have the right tools when doing any DIY project. The most essential things you'll need are the cat flap as well as a tape measure, a decent pencil and a spirit level drill, file and the Jigsaw (depending on the window or door type).

Contact the manufacturer prior to making any changes to a door made of composite. This could invalidate the warranty, or cause the weathertight seal to be broken. In this scenario, it's likely that you'll need to replace the glass with a fresh piece of toughened glass.

You'll require a jigsaw to cut out your cat flap from a wooden or uPVC door. Follow the directions provided by the manufacture. Make use of a template to mark out the size hole you require.

After you've made the hole, you should then sand down the edges of the opening to smooth them. This will stop any water damage or rust from occurring in the future. It is also recommended to seal the holes in your window or door and the back of the flap to keep out rain and wind. After the sealant has dried it is time to install your new cat-flap!

Install the Flap

Installing a flap allows your cat to go and come whenever it wishes. It's a simple procedure that most people can complete by themselves, though you will likely require the help of an expert for installing the flap in the form of a glass door or another type of uPVC door.

Take a look at the instructions that came with your cat flap. There is an illustration of the template. This will give you an idea of where the holes for the flap have to be drilled in the door. Mark the areas you will need to drill in with a pencil.


Once you have marked out the door's area, use a jigsaw to cut out the shape of the cat flap. It's a relatively easy task however, you'll need to be comfortable using a saw. Many companies will do this work for you at a reasonable price if you are hesitant to tackle it yourself.

Then, screw the inner part of the door to the hole in your door. It might be necessary to seal the flap before you do this in order to keep it waterproof and weatherproof. You can then put the outer portion of the cat flap on top of the fixing bolts, and tighten the bolts all together. It is recommended that you test the flap with your cat to make sure that it is working properly and that they can enter and leave easily through it.