Fitting a Cat Flap in a UPVC Door Allowing your cat to enter and go from the house at their own pace is a good idea to keep it physically and mentally active. A flap can help reduce toileting incidents by making it easier for the cat to leave the house if necessary.

Measure the Door

A cat flap allows your pet to go and come whenever they want without opening the door for them. This is a great way to keep your pet inside the home when you are away or at home. It also helps prevent unwanted pests from getting into your.

You should examine the door's measurements to ensure you get the correct size cat flap. There are various sizes available. You can then ensure that the cat flap is the proper size for your door made of upvc. Otherwise, it may be too large or too small, and your cat could be unable to use it.

Before you do anything however, you should use a ruler to take measurements of the length of the door in a variety of places along its edge. Also, you should take measurements of the door's height in a few spots. A door that is too tall will make your cat do an acrobatics routine each time it is tempted to use the flap.

Ask a glazier for help if you aren't sure what to measure for the door. They'll be able to determine if your door is suitable for cat flaps and give you advice on the right size flap to buy.

Draw the outline of the hole on the door after you have taken the measurements. This will give you an idea of how to cutting the hole out and will stop you from making mistakes that could cost you money in the long run!

You should also make sure that the hole you're creating is placed in the right spot. For instance, if installing the cat flap on a patio door, you must ensure that the hole isn't too close to any hinges, since this could cause leakage and damage to the seal.

It is best to delegate the task of installing a cat flap on glass doors to an experienced glazier. It may be difficult to fit a cat-flap into an existing pane. You might also discover that it breaks and loses its weatherproof seal.

Measure the Cat

A cat flap allows your pet to leave and come back whenever they want, without needing to leave him on his own. It can also stop draughts entering your home, which isn't good for your cat as well as you.

However, if you have a uPVC or composite door, it can seem tricky to fit the cat flap. These kinds of doors are typically made of different materials than standard wooden or uPVC doors, and the installation process is different as well. Make sure you check with the manufacturer to see if it is compatible before you install an uPVC cat flap on your uPVC composite or uPVC door. Alterations may cause warranty issues.

In general, these kinds of doors are made to be tough and durable 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. Consult a professional before installing a cat flap onto the uPVC door or composite.

You'll need to take the height of your child to ensure they fit through the door. This will be easiest if they are asleep or calm so that they don't move around too often. Once you have their height, you can measure the distance from their stomach to the floor in order to determine the position of the flap's bottom. This location can be marked on the door.

If your composite or uPVC door is made from metal (either aluminium or steel) you'll need be extra cautious when cutting it using power tools. The process of drilling into metal could cause cracks, especially when the area is made of toughened glass. It is highly recommended to employ a glass installer when installing an e-cat flap on a pane. This will prevent the glass from breaking or becoming fragile. A Glazier is also able to provide you with a circular cat flap hole that is less likely to break and is safer for your cat to use.

Cut the Hole

If not then you can create one yourself using a sheet of paper (tracing paper is the best choice). If it doesn't, you can create one by using the thin paper (tracing paper is a good choice). Once the shape has been drawn on the door, you can then use a spirit level to make sure that the shape is completely horizontal. This will ensure that the cat flap is positioned correctly in the door, and it will not open or close.

Next, use your jigsaw and cut the shape that has been drawn on the door. Use a blade that is specifically designed specifically for uPVC doors. It will typically be labeled with this information. If not you can ask the staff at the DIY store for assistance. Once the hole is cut and the flap is placed against it and then open it to ensure that the flap moves easily. If it is bound on any points then make use of a file or a rasp to fix this.

Also, make sure that there are no electric cables or gas pipes within the door you will be cutting through, because they could be damaged by the jigsaw. Additionally, you should be aware of any handles or other fixtures on the door that need to be removed to make room for the cat flap. You should be careful not to damage them during the process.

Most people who install a cat flap on their own will have a standard solid uPVC door, and therefore will not be dealing with any of these issues. But, if your door is made from wood or has decorative panels that cannot be removed then this will make it more difficult to complete the job.

For these types of jobs, it's recommended to seek out expert advice from a cat-flap fitter. It is essential to complete the job correctly to avoid future problems. It is essential to do it right because doing it wrong can damage the door and invalidate the warranty.

Install the Flap

Once you've made your hole, put the flap to check if it opens and fits well. If you find any points that catch or stick to the door, smooth them out using an sandpaper or hand file until it fits correctly and opens with no issues. Make sure that the flap is in line with the door.

Some kits include an example of this, however, even if yours does not, you can use a piece or thin paper instead - something similar to tracing paper. Lay the paper against the door and draw a line where you will need to place the flap (this will serve as your cutting guide). Mark four screw holes at each corner of the flap with the pencil marks you created on the door. These are the screw points that you'll need to use to fix the flap to the door.


Most uPVC doors are strong and therefore quite straightforward to cut into. But, if your door is made of GRP or a composite then this can be more complicated. If you're not experienced in this area, it might be beneficial to engage a professional to do the work for you. They will also be able tell you if your door is suitable for installing an animal flap.

You can install the cat flap onto composite doors. However, it's essential to consult with the manufacturer or a professional joiner prior to making any changes as any alterations to these types of doors could invalidate the warranty. If you decide to do the work yourself, be aware that this could be a messy and potentially hazardous task.

With composite doors, you'll generally need to use the aid of a saw or grinder to cut through the door's panel rather than simply through the GRP. This is a risky job, and you'll need to take extra care to ensure that the door is not damaged. upvc door panel replacement cat flap 's also worth noting that cutting a hole into any type of glass for a door is a lot more difficult than making the same change in a uPVC or solid wood door.