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Fitting Cat Flap in UPVC Door Panel
Cat flaps allow your pet to go in and out as they please without you having to let them in or out. They can also help stop your cat from urinating in the house.

It is easier to install the cat flap on a Upvc panel than a glass one however, you'll need some skills and the appropriate tools.

Take a look at the Door

Fitting a cat flap in the door can be a challenge but if you select the right kind of cat flap, take your time and follow the directions provided, it should not prove to be a problem. We will show you how to draw the shape, then use the jigsaw to slice the door's area and then finish off the job by securing the flap to the door. This will ensure that the flap stays in position and shields the doors from the damage caused by rain and wind.


To determine the size of the cat flap that you require, measure your pet's width. This will ensure that the flap is big enough to let your pet leave and enter the home without having to open and close the door each time, yet small enough to stop them from moving too far either way.

If your kit has a drawing showing where to drill, then put it on the door and then draw around it. If your door has a moulding or sill on the bottom edge of it then make sure you have enough space as this will ensure your cat's safety and prevent them gaining access to your home.

Then put on your eye protection and dust mask. Then using a jigsaw, begin to cut according to the lines you have pencilled in, but don't press the blade too hard as this will cause it to cut more quickly than you'd like it to. If you have a set square then make use of it to verify that you're cutting properly and also to ensure that the hole is a proper rectangle. Once you are happy with this you can begin to take off the rest of the door material.

Draw a Line

The cat flap is a great way to let your pet in and out without having to worry about them being a nuisance to a visitor, or leaving unwelcome gifts in the house. It also stops draughts and helps to keep your home's temperature steady. However, fitting an animal flap on your door can seem like an intimidating task for those who've never done it before, which is why many people to seek out an expert joiner or carpenter to do the job. This is a viable option, however you can do it yourself, provided the tools are right and the steps are adhered to.

This is much simpler to do with wooden doors, but it is still possible using uPVC. However it is important to be cautious not to harm the doors because this will invalidate your guarantee. First, you must examine the door's measurements to ensure it will accommodate the new cat-flap. This isn't too difficult for the standard uPVC door, but you may require more care if using an alternative type of door since these can be more difficult to cut into than solid uPVC panels.

The next step is to determine the height of your cat's belly. This is the measurement from the floor to the underside of the cat's stomach and you will need to find a place on the door where this measurement will fall within the range your cat is able to comfortably walk through. Once you have this information, you will be required to mark the area using pencil and a spirit level so that you can be sure that the hole you will make will be suitable for your cat.

After you've marked the area, it's time to cut the hole. You will need to use the jigsaw, and it is crucial to be patient to ensure that the cuts are clean and smooth rather than uneven and rough, since this could damage your door. It is also important to wear safety glasses and a dust mask when using the jigsaw, as inhaling the sawdust can be dangerous to your health. After you have finished cutting the hole, you will need sandpaper to smooth the edges so that the cat flap can be easily fitted into place.

Cut a hole

The process of fitting a cat flap into an existing door panel or double glazing sealed unit is quite difficult. You may be tempted to tackle the task yourself, but unless have plenty of expertise in DIY, it's likely to be best to have a professional in to do the task for you. A mistake could not only be unsightly but also pose a security threat. It could allow cold air to enter when the cat is outside and hot air to escape when inside.

Mark the hole's position on the door using an eraser and a spirit level. This will ensure that it is properly positioned and aligns with the door's other parts. It is important to have a piece of sandpaper at hand for any rough edges.

After the line is drawn, you can cut the hole using a jigsaw. Be sure to wear any necessary safety equipment for working with a power tool. If you are concerned about the noise of the jigsaw, you can purchase an electric version that is quieter and simpler to use.

It is important that you only remove the material required for the fitment of the cat flap. It is important to leave a little extra material to cover the wall of the flap. However, removing too much can cause issues or even damage to the frame of the door.

A door made of upvc may include a metal frame, or panel 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 doesn't come into contact with the wall of the cat flap, if this is done it is crucial to fill in the gap and render it watertight.

If you're looking to install a cat flap into a double-glazed or upvc window with metal frames you'll need to talk to a specialist. They will provide you with a brand new piece of glass that has the hole already made for the cat flap. This will be cheaper than trying to install a cat flap in an existing pane of glass that was not made for this purpose.

Place the Flap

Cat flaps allow your pet the freedom to go and come anytime they want and allow them to be comfortable in the house when they like. If you have a uPVC front door, it can be hard to install the cat flap. This is particularly true in the event that you don't own an glass panel that is cut. If you are willing to install a half-glazed uPVC replacement panel, it is possible to add an additional cat flap. It's not as easy as just cutting a hole through the door though and there are a few things you'll need to take care of first to ensure that it's safe.

window with cat flap , uPVC, or GRP door panel usually has a flimsy plastic outer skin bonded to a soft polystyrene core that is insulating. The material is fairly fragile and care must be taken when cutting into it to avoid damaging. This type of door comes with a template that you can use to make the hole.

After you have marked out the hole in your front door, it is time to put in the cat flap. You can pick from a range of models, ranging from simple push-button flaps to microchip activated ones that allow your pet in. But, regardless of the type of cat flap you choose it's crucial to ensure that your cat can comfortably use the flap without getting trapped outside in bad weather.

It's a good idea select circular fittings instead of one that is square, since circles can be more securely cut into the door glass. This is because square holes are more likely to break the glass when they are drilled. It's also a much safer option as you don't risk having to drill into toughened glass that might break and hurt your pet or family members. This is particularly important if there are elderly or children at home who could be injured by glass shattering.

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