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Fitting Cat Flap in UPVC Door Panel
Cat flaps allow your pet to go in and out at their own pace, without having to let them in or out. They can also help stop your cat from urinating in the house.

Installing cat flap installers on the door panel made of upvc is much simpler than installing one in glass doors, however it will require some expertise and the right tools.

Measure the Door

Fitting a cat door in a front door can be difficult, but provided that the cat flap is of the correct one and you follow the directions, it shouldn't be too difficult. We will show you how to mark out the shape, then use a jigsaw to cut out the door's area and then finish off the job by fixing the cat flap to the door. This will ensure that the flap stays in position and protects the doors from damage caused by rain and wind.

To determine the size of the cat flap that you need, measure your pet's width. This will ensure that the flap is large enough to let your pet leave and enter the home without needing to open and close the door every time, but it is also small enough to stop them from going too far in either direction.

If your kit has an illustration of the location to drill then you can put it on the door, and then use a pencil around it. If your door has a sill or moulding at the bottom, make sure that you leave enough space between your cat and these elements.

Set a square to ensure that you're cutting correctly and ensure that the hole is a good rectangle shape. Once you are satisfied with this, you are able to begin removing the rest of the door material. If you own a square that you have cut, use it to check that you're cutting properly and to make sure the hole is a proper rectangular shape. Once you are satisfied with this 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 outside without worrying about unwanted visitors or unwanted gifts. It also stops draughts and helps to keep your home's temperature steady. However, putting the cat flap to your door could be an intimidating task for those who have never done it before, leading many people to call an expert joiner or carpenter to do the job. This is a viable option, however you can do it yourself if your tools are right and the instructions are followed.

This is much easier to accomplish on a wooden door, but it is still possible using uPVC. However it is important to be cautious not to damage the doors as this could invalidate your guarantee. First, you must examine the door's measurements to ensure that it can accommodate the new cat-flap. This should be simple enough when you have an ordinary uPVC door, but you might need to take more care if using a composite or other type of door as these are more difficult to cut than solid uPVC panels.

Next, you will need to determine the height of your belly for your cat. doors with cat flap is the distance from the floor to the underside of the cat's stomach and you will need to locate a place in the door where this measurement will fall within the range that your cat can comfortably pass through. Once you've figured out the measurements you'll have to mark the area with a spirit-level and a pencil, so that you are certain that the opening will fit your cat.

Once you've marked the area, it is time to make the hole. You will require the jigsaw, and it is crucial to take your time to ensure that the cuts are clean and smooth instead of rough and uneven, as it could cause damage to your door. Wear safety glasses and a dust mask when using the jigsaw. Inhaling sawdust is hazardous for your health. After you've finished the cutting, you will need to smooth out the edges of the hole with sandpaper, so that the cat flap can be fitted easily into place.

Cut a Hole

It isn't easy to put a cat flap into the door panel or double glazing unit. You might be tempted to tackle the task yourself, but unless you have a lot of experience with DIY, it's likely to be best to have a professional in to do the job for you. A faulty job can not only look ugly but also pose security risks. It could let cold air to enter when the cat is outdoors and hot air out when the cat is inside.


The first thing you have to do is mark out the location of the hole in the door using a pencil and an ax level. This will ensure that it is correctly positioned and that it runs flush with all the other parts of the door. Make sure you have sandpaper in your possession to smooth any rough edges.

Wear the safety equipment you need to work with a power tool. If you are concerned about the sound produced by the jigsaw, consider buying a cordless version which is much quieter and easier to use.

You should only remove the material that is required to fit the cat flap. A little bit of extra material is required to increase the thickness of the wall of the flap, but removing more than this can cause problems and even harm the frame of the door.

A door made of upvc could contain a metal frame or panel within it which could block the microchip cat flap and if this is the case you'll need to make an oversize hole so that the metal does not touch the the cat flap, if this is done it is important to fill in the oversize gap and seal it with water.

If you're planning to install a cat flap into an upvc door or a double glazed window with a metal frame then you will need to speak to a professional who can provide you with a new pane of glass with the hole for the cat flap premade inside. It is cheaper to do this than to attempt to fix the flap to an existing pane of glass that hasn't been designed specifically for the purpose.

Fit the Flap

Cat flaps give your pet the freedom to go and come whenever they want, allowing them to relax in the home whenever they like. However, if you have a uPVC door, it might be difficult to put in a cat flap, especially when you don't have a glass pane that can be cut to accommodate one. If you're willing to purchase and install a new half-glazed uPVC panel, it's possible to install an animal flap onto the doors. It's not as simple as simply cutting a hole through the door, however there are some things you'll need to take care of first to ensure it's safe.

A uPVC, GRP or composite door panel is typically made up of a flimsy plastic outer skin 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 usually includes a template which you can use as a reference to cut the hole in the door.

After you've marked the position of the hole in your door, it's time to put in the cat flap itself. You can choose from a variety of models, ranging from simple push-button models to ones that are microchip-activated and allow your pet in. Whatever kind of cat flap you pick, it's vital that your cat can use the flap without getting stuck in the rain.

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

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