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Fitting a Cat Flap
Getting a cat flap fitted in to your home can be a major step for any pet owner. Whether your cat is old and requires extra security, or you have a new kitten who require a vet check There are a lot of options there to choose from.

Installing a cat flap may be intimidating for people who aren't professionals, but with the right instructions, it's not hard to complete. The key is preparation, planning and accuracy.

Choose the Right Door or Windows

There are a variety of cat flaps, some with locks that can be used to stop your pet from getting out or in, while others have high tech features like microchip door entry system. It is important to consider the ease of your cat to train to use the flap prior to making a purchase and fit one.

Depending on the style of your house, it's usually best to situate the cat flap inside a window or door that opens to an area that is protected from the garden so your cat is secure when entering and leaving the home. If you can this will also allow them a way back should they be chased by a cat or by humans intent to harm them.


It is possible to install an egress flap inside a uPVC door or glass window however it's not as straightforward as fitting one into wooden doors. This is due to the fact that uPVC and composite doors come in various thicknesses, and this can impact the way holes are cut as well as the materials you're fixing them into.

If you're installing the flap on the glass of a door it is recommended that you find a glazier who is experienced in such work to avoid costly errors. If you're fitting the flap to an old wooden door, begin by introduction of your cat to it prior to fitting it to allow them to get used to its size and shape and explore it from every angle.

Find out the size of your cat's belly

To install a cat flap that's a good fit for your cat, you'll need to measure your cat. This will enable you to make sure that the flap is at the right height on the door or window, and also that it's large enough for him to enter and exit easily.

Place your pet on its back and gently run your fingers across their belly. Feel for any fat pads that are squishy which may be visible around their lower back, face, and the limbs. The extra padding shields your pet and allows it to move more freely, especially when performing feline Acrobatics.

You can also consider the weight of your pet to determine how large an opening you require. If your cat weighs more than 5Kg, for example the suggested flap size is 14x12cm.

Measure your windows or doors

As the name suggests, this type of cat flap is designed to be affixed to the door, and offers a way for your pet to enter or leave as it pleases. These flaps are made of plastic or aluminum and are placed in the middle of the door. They feature a two-way swinging opening that can be opened by lightly pushing on either side. The flaps can be locked that offer added security, so that your cat is not able to enter the door from outside.

A window is a common location for a cat flap and these are easy enough to install, though they usually need to be set up high as it is difficult for cats and dogs to reach them otherwise. If the window is too high to use a cat flap then steps, ramps or purpose built stairs can be used to aid the animal in accessing it.

Cat flaps can be installed into a brick wall, however this is not recommended unless skilled in masonry work as it could weaken the wall's structure. It is important to make sure there are no cables and pipes inside the wall before you begin. It is recommended to consult an expert when you need to cut a hole in the wall for pipes and cables. Wearing protective goggles or a dust mask will help you avoid inhaling the sawdust that is created when you cut into your walls.

Choose the Cat Flap that is right for you.

There are numerous cat flaps available on the market, and they have various features. Some have security options like magnetic locks or microchip recognition to prevent unauthorized entry and also stop your pet allowing pets or friends into the house. Some have insulation as well as weatherproof seals to block draughts and moisture.

There is also a choice of sizes based on the size and breed of your pet. Some cat flaps come in rectangular shapes, whereas others are square or circular. The best type of cat flap will be determined by the space you have available and the type of door or window you want to attach it to.

Last but not least, consider the type of opening mechanism your cat flap will use. The cheapest option is a simple swing-out aluminium or plastic door. However, it won't stop other pets or cats from entering and you may let draughts through as well.

After you've chosen the appropriate cat flap and measured your door or window and window, it's now time to put it in place it. Begin by marking the belly's 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 jigsaw to cut out the door's outline. When you're satisfied with the results sand down the edges and drill through the pencil lines to make holes for screws.

Prepare the Tools

Like all DIY tasks, it's recommended to have the right tools for the job. The most essential things you'll need are the cat flap along with a tape measure, a decent pencil and a spirit level drill, file, and an Jigsaw (depending on the window or door type).

Check with the manufacturer prior to making any changes to a composite door. This could invalidate the warranty or cause the weathertight seal to become broken. In this instance, you'll probably have to install an entirely new pane of toughened glass instead.

For wooden or uPVC doors will require cutting out the design of your cat flap using the jigsaw and follow the instructions given by the manufacturer. If possible, you can use a template to help you identify the size of hole you'll have to cut.

After you've cut the hole, you will need to sand the edges of the opening. This will prevent any water damage or rust from occurring in the future. Also, you should apply any sealant that is needed to the rear of the cat flap as well as to the holes in the door or window to keep out the elements of wind and rain. Once the sealant is dry, you're ready to install your new cat flap !

Install the Flap

Fitting a flap will allow your cat to move around whenever it wishes. This is a straightforward process that most people can accomplish themselves, although you'll likely require the help of a professional if you are installing the flap in a glass door or other type of uPVC door.

Take a look at the instructions included with your cat flap. There is a template drawing. This will provide you with an idea of where the holes for the flap need to be drilled in the door. Then, mark the places that you'll must drill using the pencil.

After you've marked the door's area then use a jigsaw cut out the design of the cat flap. This is a fairly simple job, but you'll require a good understanding of a jigsaw. Many companies will complete this for you at a reasonable cost in case you're hesitant to tackle it yourself.

Then, attach the outer part to the hole of your door. It is possible to seal the flap prior to you do this in order to keep it waterproof and weatherproof. The outer part of your cat flap may be placed on the bolts' tops and then tightened together. It is recommended to test the flap using your cat to ensure that it is working properly and that they are able to enter and leave easily through it.

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