Fitting a Cat Flap in a UPVC Door

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

The freedom to let your cat move around the house whenever it wants is an excellent way to keep your pet active and mentally engaged. A flap can aid in reducing the frequency of accidents due to toilets, making it easier for cats to leave the house if required.

Measure the Door

A cat flap lets your pet leave and come back whenever they want without you having to open the door. This makes it perfect for keeping them in when you're at home or away, and helps keep unwanted pests out of the home too!

It is essential to take measurements of the door to ensure you get the correct size cat flap. There are various sizes available. You should then make sure that the cat flap is the right size for your door made of upvc. In the event that it is not, it could be too big or small, and your cat could be unable to use it.

Get a ruler and determine the width at several points along the edge of the door. Also, you should take measurements of the door's height in a couple of places. A door that is too tall will cause your cat to do an acrobatics routine each time it is tempted to use the flap.

If you're not sure of how to measure a door, it might be a good idea to seek help from a glazier or someone who performs this kind of work often. They will be able to assist you in determining whether the door you have is suitable for a cat flap and provide you with the appropriate size of flap to purchase.

When you've got your measurements, the next step to do is to draw the outline of the hole on the door. This will give you an idea of how to cutting the hole and will prevent you from making mistakes that could cost you money in the end!

It is also important to ensure that the hole you're creating is placed in the right spot. If  cat flap installer near me repairmywindowsanddoors  fitting a cat flap to an outdoor door, it's vital that the hole does not reach too close to the hinges. This could cause leakage or problems with the seal.

If you have a glass door, it might be best to let this job to a glazier. It isn't easy to install a cat-flap within an existing pane. You might also discover that it breaks and loses its weatherproof seal.

Measure the Cat

A cat flap lets your pet leave and come back whenever they wish without needing to leave him alone. It can also help to keep draughts out of your home, which isn't bad for you or your cat!

If you have a uPVC door or composite door, it could be difficult to install a cat flap. These doors are constructed of different materials and the process of installing them is different. Before you consider fitting a cat flap in your uPVC or composite door, make sure that it's compatible and that you've checked with the manufacturer because alterations could cause the warranty to be invalidated.

In general, these kinds of doors are made to be durable and tough with insulation included. This makes them more resistant to the elements of weather than other types of doors, but they may be difficult to fit an animal flap. If you're uncertain about whether your uPVC or composite door can accommodate a cat flap, consult with a professional jointer prior to starting.

You'll have to measure the height of your child to ensure they pass through the door. It's easiest to measure their height when they are calm or asleep, so that they aren't moving around. Once you know their height you can measure the distance between their stomachs and the floor in order to determine the position of the bottom of the flap. Then, you can mark this position on the door.

When using power tools to cut your composite or uPVC door, you will need be extra cautious. Drilling into metal can cause cracks, particularly if the area is composed 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 becoming fragile or shattering. Glaziers can also provide you with a circular hole 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


A good quality cat flap will come with a template drawing that can be used to mark the area on your door where the hole will be. If it doesn't, you can make one yourself using the thin paper (tracing paper is a good choice). After the shape is drawn in pencil on the door, you can then use a spirit level to ensure that the shape is completely horizontal. This will allow your cat's flap to properly fit into the opening and stop it from being capable of sliding open or close.

Next, use your jigsaw and cut the design that was drawn on the door. Use a blade that is specifically designed for uPVC doors. It will typically be labeled with this information. If not then ask the staff at your DIY store for help. After the hole has been cut and the flap is placed against it and open it to ensure that the flap is moving smoothly. If it becomes stuck on any point, then you can use a file or a sandpaper to correct this.

Make sure there aren't any gas or electric pipes inside the door you're going to cut into. Your jigsaw could damage them. Also, be aware of any handles or other door fixtures that will have to be removed to make room for the cat flap. Be careful not to damage them during the process.

Most people who fit a cat flap themselves will have an ordinary solid uPVC door and won't have to deal with any of these problems. However, if your door is made of wood or has decorative panels that cannot be removed then this will make it more difficult to complete the job.

It is always advisable to seek assistance from an expert cat flap fitter when it comes to these types of jobs because it is crucial to get the job done correctly to avoid potential issues in the future. Getting it wrong can result in the door becoming damaged and may make it impossible to honor the warranty.

Install the Flap

After you've cut your hole, you can place the flap to check if it opens and fits. If you find any points that stick or catch to the door, smooth them out using a hand file or sandpaper until it fits properly and opens without any problems. Make sure the flap is perfectly flush with the door.

If your kit doesn't have templates, you can make use of thin paper such as 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 a cutting guide). Draw four screw holes on each corner of the flap with the pencil marks you made on the door. These will be the screws will be used to secure it in place.

Most uPVC doors are strong and easy to cut. However, if your door is made of GRP or a composite material, this may be more difficult. If you're not familiar in this area, it might be beneficial to engage a professional to do the work for you. They will also be able to inform you if the door is suitable to install a cat flap.

You can fit a cat flap into composite doors, but it is important to verify with the manufacturer or a professional joiner prior to making any changes as any alterations to these doors could invalidate the warranty. If you decide to complete the work yourself, keep in mind that it can be messy and could be dangerous.

You'll require a grinder or saw to cut through composite doors more than just the GRP. Be aware that this could be very dangerous and you'll need to take great care not to harm the door or yourself, as it is very fragile. It's worth noting that it's much more difficult to make the door glass than a uPVC door or a solid wood doors.