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Fitting Cat Flap in UPVC Door Panel
Cat flaps let your pet move around as they please without needing to let them in or out. They can also help prevent your cat from urinating inside the home.

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

Measure the Door

Fitting a cat door in a front door can be difficult however, so long as the cat flap is of the correct one and you follow the directions, it shouldn't be too difficult. We will help you mark the shape and use an jigsaw to cut out the door's area. Then we will finish the job by affixing the cat flap. This will ensure that the flap stays in position and shields the doors from the damage caused by wind and rain.

To determine the size of the cat flap you require, take a measurement of the width of your pet. This will ensure that the flap is big enough to allow your pet to enter and leave the house without needing to open and close the door each time, but it is also small enough to prevent them from going too far in either direction.

Once you have the measurements, you can mark where on the door the template should be positioned, usually this is done with an X, however some kits include an illustration that outlines the location to drill, if yours does then stick it to the door and draw a line around it. If your door has a sill or moulding along the bottom edge then make sure you have enough space as this will keep your cat safe and will prevent them from getting access to your home.

Use a set square to make sure you're cutting properly and to make sure the hole is a good rectangle shape. Once you are satisfied with this, you can start removing the rest of the door material. If you have a square that you have cut, use it to check that you are cutting correctly and to ensure that the hole is in a rectangle. Once you are satisfied with the shape, you can begin to take off the rest of the door material.

Draw a Line

The cat flap lets you to let your pet go inside and out without worrying about unwanted visitors or unwanted gifts. It also helps prevent draughts and helps to keep your home's temperature stable. However, installing the cat flap to your door can seem like an intimidating task for those who have never done it before, leading many people to call a professional carpenter or joiner to do the job instead. It is an option, but you can do it yourself if your tools are in order and the steps are followed.

Although this is much simpler to accomplish when using a timber door it is still possible to do this in uPVC doors, though you must be cautious not to damage the doors, as this can end the warranty. First, you need to measure the door to make sure it will accommodate the new cat-flap. If you have an ordinary uPVC panel it should be a breeze. However in the case of made of composite or another kind of door, you might need to be more careful.

The next step is to determine the belly height of your cat. This is the distance between the floor and the underside of your cat's stomach. You'll need to locate a space on the door that will allow your pet to comfortably pass through. Once you've got the information you'll have to mark the area with a spirit level and a pencil so you know the opening will fit your cat.

Once you've marked the area, it's time to cut the hole. It is crucial to be patient and use a jigsaw in order to ensure that the cuts are smooth and clean, not rough and uneven. This could damage your door. Wear safety glasses and a dust mask when working with the jigsaw. Inhaling sawdust can be harmful for your health. Once you have completed the cutting, you will have to smooth out the edges of the hole with sandpaper, so that the cat flap can be fitted easily in place.

Cut a Hole

It can be difficult to install the cat flap onto a door panel or a sealed double glazing unit. If you're not proficient in DIY, it's recommended to hire a professional to do the job for you. A faulty job can not only be unsightly but also pose security risks. It could allow cold air in when the cat is outside and hot air to escape when inside.

The first thing you have to do is mark the position of the hole in the door with a pencil and a spirit level. This will ensure that it is properly positioned and that it runs flush with all the other components of the door. upvc door panel cat flap should make sure you have an sandpaper piece on hand to smooth any edges.

After the line is drawn, you can cut the hole with the jigsaw. Remember to wear the appropriate safety gear for working with a power tool. If you're concerned about the noise, you can buy a cordless jigsaw which is quieter and easier.

It is important that you only remove the material required to fit the cat flap. It is important to leave some extra material to make the wall thickness of the cat flap. However, removing too much can cause issues or even damage the frame of the door.

A upvc door may include a metal frame, or panel that could interfere with the microchip cat flap if this is the case, you will need to cut an oversize hole so that the metal does not get in contact with the wall of the cat flap. If read this is the case, it is important to fill in the oversize gap and seal it with water.

If you want to install a cat flap inside a upvc or double-glazed window with metal frames you'll need to talk to a specialist. They can provide you with a brand new piece of glass that has the hole already pre-made for the cat flap. It is cheaper to get this done rather than trying to fix the flap to an existing glass pane that was not designed specifically for the purpose.

Place the Flap

Cat flaps give your pet the freedom to come and go whenever they like and allow them to be comfortable at home whenever they like. If you have an uPVC front door, it might be hard to install a cat flap. This is particularly true in the event that you don't own glass panels which can be cut. If you're looking to install a half-glazed uPVC replacement panel, it is possible to add an additional cat flap. It's not just a matter of drilling a hole into the door. You'll also need to take a few steps to ensure that it is secure.

A composite, uPVC, or GRP door panel usually has an flimsy plastic outer layer joined to a soft insulating polystyrene core. The material is fairly fragile and care must be taken when cutting through it to avoid damaging. This type of door typically has a template that you can use as a reference to cut the hole in the door.

After you have carved out the opening in your front door, it's time to put in the cat flap. You can purchase and install various models, from basic push-button operated ones to microchip activated units that only let in your pet. Whatever type of cat flaps you choose it's essential that your cat can use the flap comfortably without getting stuck outside in bad weather.


It is a good idea to select a circular fitting rather than one that is square, since circles are more securely cut into door glass. It's because square holes are more likely to break the glass when they're drilled. It's also a safer choice to use since you're not at risk of drilling into toughened glass that may break and injure your pet or family members. This is particularly important if there are elderly or children living in your home that could be hurt by glass shards.

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