Fitting a Cat Flap in a UPVC Door

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

The freedom to let your cat go in and out of the house whenever it wants is an excellent way to keep your pet active and mentally stimulated. A flap can help reduce accidents with toilets by making it easier for the cat to leave the home when required.

Measure the Door

A cat flap allows your pet to come and go whenever they want without you having to open the door. This is a great method to keep your pet safe in the home when you are away or at home. It also helps to keep unwanted pests out of your.

It's important to measure the door before you buy a cat flap since there are a variety of sizes available. You should then make sure that the cat flap is the right size for your upvc doors. Otherwise, it could be too large or small and your cat might have difficulty using it.

Take a ruler, and determine the width at several places along the edges of the door. You should also determine the door's height in a few spots. This is because the door that is too high will cause your cat to perform an exercise routine like a gymnast every time they want to use the flap!

If you're not sure how to measure a door, it might be a good idea to seek help from a glazier or someone who is familiar with this kind of work frequently. They can determine whether your door is suitable for cat flaps and give you advice on the right size flap to buy.

Draw the shape of your hole on the door once you have the measurements. This will assist you when cutting the hole and will save you money!

You should also make sure that the hole you're making is in the right place. If you're fitting the cat flap onto an outdoor door, it's important that the hole doesn't be too close to hinges. This could lead to leakage or problems with the seal.

It is recommended to leave the job of installing a cat flap on glass doors to an experienced glazier. It may be difficult to install a cat-flap within an existing pane. You might also discover that it cracks and loses its weatherproof seal.

Measure the Cat

A cat flap allows your pet to leave and come back whenever they wish without having to leave him alone. It also helps stop the draughts from entering your home, which isn't good for you or your cat!

If you own a uPVC door or composite, it might be difficult to install a cat flap. These doors are constructed of different materials and the installation is different. Before you consider fitting an egress flap to your uPVC or composite door, make sure that it's compatible, and that you have consulted the manufacturer because alterations could affect any warranties.

In general, these kinds of doors are designed to be durable and tough with insulation included. They are more resistant to the elements than other kinds of doors, however it isn't always easy 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 the height of your child to make sure they pass through the door. It is easiest to measure their height when they are calm or asleep, so they don't sway around. Once you have their height you can measure the distance from their stomach to the floor to determine the position of the bottom of the flap. You can then mark this spot on the door.


When using power tools to cut your composite or uPVC door, you will need be extra cautious. The process of drilling into metal could cause cracks, particularly if the area is toughened glass. This is the reason it's advisable to hire an experienced glazier when putting your cat flap in the glass pane. This will stop the glass from shattering or becoming brittle. A glazier will also be capable of providing you with a cat flap that is less likely to break and is safer for your cat to use.

Cut the Hole

A high-quality cat flap will come with a template drawing that you can use to mark the spot on your door where the hole will go. If it doesn't, create your own using a thin piece of paper (tracing papers are perfect). After the shape is pencilled in on the door, then use a spirit level to ensure that the design is horizontal. This will ensure that your cat flap is positioned correctly in the door, and it will not slide open or close.

Then, you can use your jigsaw and cut the design that was marked on the door. Make sure that you are using a blade suitable for use on uPVC doors. Usually, it will be marked as such If not, ask the staff at your DIY store for advice. Once you have the hole cut out and the flap section is in place, put it up against it and push it open to ensure that the flap's movement is smooth. If it becomes stuck on any point, then you can use a file or a sandpaper to fix this.

Verify that there aren't electric or gas pipes within the door you plan to cut into. Your jigsaw could damage them. Also, be aware of any handles or other fixtures on the door which will need to be removed in order to make room for the cat flap and be careful not to harm them during the process.

Most people who install a cat flap on their own will have a standard solid uPVC front door, so they won't be faced with these issues. If your door is made of wood or has decorative panels that cannot be removed, this could increase the difficulty of the job.

For these types of jobs, it's important to get advice from a cat flap fitter. It is crucial to complete the job correctly to avoid future problems. It is crucial to get it right, as getting it wrong could damage the door and void the warranty.

Place the Flap

After you've made your hole cut, put the flap on to see if it fits and is able to open easily. If you find any points that stick or catch or stick, you can file them down using a hand file or sandpaper until it fits properly and opens without issue. Be sure that the flap is flush 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 in order to indicate the location where the flap is placed (this will serve as your cutting guide). Mark four screw holes on every corner of the flap using the pencil marks you traced on the door.  cat flap glass door installation near me  are the screws you'll need to use to fix it in place.

Most uPVC doors are sturdy and easy to cut. But, if your door is made of GRP or a composite then it can be more challenging. If you're not familiar in this area, it might be wise to get an expert to complete the work for you. They will also be able to determine if your door is suitable for the installation of the cat flap.

If you're planning to install a cat flap on composite doors, it is important to first confirm the manufacturer or a professional joiner. Any changes made to these doors may cause the warranty to be void. If you decide to complete the work yourself, keep in mind that it could be a messy job and even dangerous.

With 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 potentially dangerous job, and you will need to take extra care to not damage the door. It's important to remember that it's more difficult to make the door glass than it is for a uPVC door or a solid wood doors.