Notes

Fitting a Cat Flap in a UPVC Door
Allowing your cat to come and go out of the home at its own pace is a good idea to keep it physically and mentally stimulated. A flap can reduce accidents with toilets by making it easier for your cat to leave the house if required.

Take a look at the Door

A cat flap allows your pet to come and go whenever they want without having to open the door for them. This is a great method to keep your pet safe in the house when you're away or at home. It also helps prevent unwanted pests from getting into your.

It is essential to measure the door prior to when you buy a cat flap as there are a variety of sizes available. You can then ensure that the cat flap is the proper size for your door made of upvc. In the event that it is not, it could be too large or small and your cat may have trouble using it.

Take a ruler, and measure the width at several points along the edge of the door. Also, take measurements of the door's height in a few spots. This is because a door that is too high will cause your cat to perform an exercise routine like a gymnast every time they need to use the flap!

Ask a glazier for help when you're unsure of how to measure the door. They should be able to assist you in determining whether not your door is suitable for a cat flap and provide you with the appropriate size of flap to buy.

Draw the outline of the hole on your door after you have taken the measurements. This will provide you with an idea of how to cutting the hole and will prevent you from making a mistake that could cost you money in the future!

Make sure that you put the hole in the right position. If you're fitting an apex flap to a patio door it is important that the hole does not get too close to the hinges. This could result in leakage or problems with the seal.

If you have glass doors it is best to let this job to a glazier. It may be difficult to install a cat-flap within an existing pane. It is also possible that it cracks and loses its weatherproof seal.

Measure the Cat

A cat flap allows your pet to move around as they want without you having to leave him alone. It can also stop draughts from entering your house, which aren't bad for you or your cat!

However, if you own a uPVC or composite door it can seem tricky to fit the cat flap. These types of doors are often made from different materials than traditional wooden or uPVC doors and the process of installing them is different, too. Before you consider fitting an egress flap to your uPVC or composite door, be sure that it is compatible and you have checked with the manufacturer because alterations could affect any warranties.


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

You'll need to take their height in order to make sure they pass through the door. It's easier to measure their height when they are calm or asleep, so they don't sway around. Once you have their height and weight, you can determine 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 location on the door.

If your composite or uPVC door is made of metal (either aluminium or steel), you'll need to be very careful when cutting it using power tools. The drilling process can make cracks, particularly if the area is made of toughened glass. It is recommended to hire an expert glass installer when putting in the cat flap inside the pane. This will stop the glass from shattering or becoming hard. Glaziers can also provide you with a circular hole for the cat flap, which will be less likely to break and is safer for your cat to use.

Cut the Hole

A good quality cat flap should come with a drawing template that you can use to mark the location on your door where the hole needs to go. If it doesn't, create your own by using a thin sheet of paper (tracing papers are great). Once the shape has been drawn in pencil on the door, you can then use your spirit level to ensure that the shape is 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 marked on the door. Make sure that you're using a blade that is suitable for use on uPVC doors - usually it will be marked accordingly however, if not, ask the staff at the DIY store for guidance. Once you have the hole cut out and the flap section is in place, put it against it and push it out to ensure that the flap's movement is smooth. If it is bound at any point, you can use the filer or the rasp to fix this.

Also, make sure whether there are any electric cables or gas pipes inside the door that you will be cutting through since they could be damaged by your Jigsaw. Also, be aware of any handles or other fixtures on the door that will have to be removed in order to fit the cat flap. Be careful not to harm them during this process.

Most people who install a cat flap on their own have an ordinary solid uPVC front door, so they won't be faced with these problems. If your door is constructed of wood or has a decorative piece that cannot be removed, this can make the job.

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

Fit the Flap

After you've made the hole drilled, place the flap on to check whether it will fit and can be opened easily. If you find any points which catch or stick, use a hand file or sandpaper to file them down until they fit properly and can be opened without issue. Make sure the flap is flush with the door too.

If your kit doesn't include an example, you could use thin paper like tracing or acetate. Place the paper against the door and draw an area on which you'll want to position the flap (this will serve as your cutting guide). Draw four screw holes at every corner of the flap with the pencil marks you traced on the door. These will be the screws you'll need to use to fix it in place.

The majority of uPVC doors are sturdy and easy to cut. If your door is constructed of GRP or composite however, it could be more difficult. If you're not familiar with this then it may be wise to get an expert to complete the job for you. They can also tell you if your door is suitable to install a cat flap.

You can install the cat flap onto composite doors, but it is important to verify with the manufacturer or a professional joiner first as any alterations to these doors may invalidate the warranty. If you decide to complete the work yourself, keep in mind that it can be a messy job and may even be hazardous.

You'll need to use a grinder or saw to cut through composite doors rather than just the GRP. Be aware that this could be extremely dangerous work and you'll need to take extreme care not to damage the door or yourself, as it is very fragile. It's worth noting that it's more difficult to create a hole in a door glass than a uPVC door or a solid wood doors.

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