Fitting a Cat Flap in a UPVC Door

· 6 min read
Fitting a Cat Flap in a UPVC Door

Allowing your cat to come and go out of the house at their own pace is a good idea to keep it mentally and physically engaged. A flap can aid in reducing accidents with toilets by making it easier for your cat to leave the house when needed.

Measure the Door

A cat flap lets your pet to move around whenever they want without opening the door for them. This is a great method to keep your pet in the house when you're away or at home. It also helps to keep unwanted pests out of your.

It is important to examine the door's measurements to ensure that you have the right size cat flap. There are various sizes available. This ensures you get the right size to fit into your door made of upvc otherwise, it could be too small or too large and your cat will have trouble using it.

Use a ruler to take measurements of the width at various places along the edges of the door. Also, you should measure the height of the door in a few places. A door that is too tall can cause your cat to perform a gymnast routine every time it uses the flap.

Ask a glazier for assistance in case you're not sure what to measure for the door. They'll be able assist you in determining whether or the door you have is suitable for a cat flap and help you decide on the best size of flap you should purchase.

Mark out the shape of the hole on the door after you have taken your measurements. This will give you a guide when it comes to cutting the hole and will prevent you from making a mistake that could cost you money in the future!

You should also make sure that the hole you're creating is in the correct place. For instance, if you're fitting the cat flap in the patio door, you must ensure that the hole is not too close to any hinges, since this could cause leakage and issues with the seal.

It is best to leave the job of installing the cat flap onto a glass door to an experienced glazier. It can be a challenge to install a cat flap into an existing pane of glass, and you may find that the process causes it to break and lose its weatherproof seal.

Measure the Cat

A cat flap allows your pet to move around whenever they like without having to leave them home to themselves. It can also prevent draughts entering your home, which isn't good for your cat as well as you.

If  cat flap installation near me  have a uPVC door or composite, it may be difficult to install the cat flap. These doors are made from different materials, and the way they are installed is different. Make sure to inquire with the manufacturer if the door is compatible prior to installing an uPVC cat flap on your uPVC composite or uPVC door. Modifications can invalidate warranties.

They are designed to be durable and tough, with insulation. They are more resistant to elements than other kinds of door, but it can be difficult to install a cat flap. Get advice from a professional before installing a cat flap on the uPVC door or composite.

You'll have to measure their height to ensure they pass through the door. This is easiest when they're asleep or calm, so that they don't move around too often. Once you've established their height, measure the distance between their stomachs and the floor to determine where the bottom of the cat flap should go. You can then mark this spot on the door.

If you are using power tools to cut your uPVC door or composite door, you need be cautious. The drilling process can make it crack, especially when the area is composed of toughened glass. It is highly recommended to employ an expert glass installer when putting in the cat flap inside the pane. This will stop the glass from becoming fragile or shattering. A glazier will also provide you with a circular hole to use for the flap for your cat. This will be less likely to break and is more secure for your cat to use.

Cut the Hole

If it does not, you can make one yourself with a sheet of paper that is thin (tracing paper is the best choice). If it doesn't, you can make one yourself using a sheet of thin paper (tracing paper is a good choice). After the shape has been drawn on the door, use your spirit level to make sure it's horizontal. This will allow your cat's flap to properly fit into the door and prevent it from being able to slide open or close.

Next, use your jigsaw, and cut the shape that has been written on the door. Make sure that you are using a blade suitable for use on uPVC doors - usually it will be labelled accordingly If not, ask the staff at your DIY store for assistance. Once the hole is made then place the flap against it and then open it, making sure that the flap moves smoothly. If it binds at any point, you can use a filer or a rasp to fix this.

Verify that there aren't gas or electric pipes inside the door you're planning to cut into. The jigsaw may damage them. Also, be aware of any handles or other fixtures that are in the door, which must be removed in order to install the cat flap. Be careful not to scratch these objects while cutting.

Most people who install a cat flap themselves will have the standard solid uPVC door and so will not be dealing with any of these issues. However, if your door is made from wood or has decorative panels that cannot be removed, this could increase the difficulty of the task.

For these kinds of jobs, it's recommended to seek out expert advice from a cat-flap fitter. It is important to perform them correctly to avoid problems in the future. It is important to get it right, as getting it wrong could damage the door and void the warranty.

Fit the Flap

Once you have cut your hole, you can place the flap to check whether it opens and fits. If you notice any spots that catch or stick to the door, smooth them out using the aid of a hand file or sandpaper until it fits properly and opens without any problems. Make sure the flap is in a flush position with the door.

If your tool doesn't have a template, you can use thin paper like tracing or Acetate. Place the paper on the door and draw a line to show where the flap should be placed (this will serve as a cutting guide). Draw four screw holes on every corner of the flap with the pencil marks you made on the door. These will be the screw points that will be used to secure the flap to the door.

Most uPVC doors are solid and therefore simple to cut into. If your door is made of GRP or composite however, it could be more difficult. If you're not familiar in this area, it might be wise to get a professional to handle the job for you. They will also be able to tell you if your door is suitable for installing an animal flap.


You can fit an opening for a cat flap in composite doors, but it is important to check with the manufacturers or a professional joiner before you do so since any modifications to these types of doors could invalidate the warranty. If you decide to tackle the work yourself, keep in mind that this can be a messy job and may even be hazardous.

When you have composite doors, you'll typically need to use a saw or grinder to cut through the door's frame rather than just through the GRP. This is a risky job, and you'll need to take extra care to avoid damaging the door. It's important to remember that cutting a hole into any type of door glass is far more difficult than making the same modification in the case of a uPVC or solid wooden door.