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Do you have a cat that likes to be outside but is annoyed by the constant opening of the door?
It is often tedious to keep getting up to let your cat in and out.

A cat flap in the glass door can be the ideal solution to make life easier for you and your cat.
In this blog post, you will learn everything about installing a cat flap in glass doors, what you need to consider and which products are particularly recommended.

Instructions for installing a cat flap in a glass door

Hands installing a cat flap in a glass door, tools and installation material visible, focus on the hands and the flap, interior, daylight, photography, closeup with natural lighting.

Installing a cat flap in a glass door is a practical solution to allow your cat freedom without having to constantly open the door. The first step is to carefully measure the door to determine the right size cat flap. You need to measure the glass precisely and mark the position of the flap with a pencil. Make sure to choose the height so that your cat can comfortably go through the flap.

After you have marked the position of the cat flap, the next step is to cut out the opening in the glass. For this you will need a jigsaw with a special glass cutting blade. To protect the glass, you should tape it around the marked area with masking tape. Then carefully cut along the markings to create the opening for the cat flap. It is extremely important to work slowly and precisely so as not to damage the glass.

Once the opening is ready, you can start assembling the cat flap. Insert the flap and check that it fits perfectly. Then attach the flap to the glass using the screws provided. Finally, you should seal the edges with silicone to keep out drafts and water. Now your cat flap is ready for use and your four-legged friend can enjoy his new freedom!

Materials required for installation

To install a cat flap in a glass door, you will need some special materials and tools. First of all, you will obviously need a suitable cat flap that is suitable for installation in glass. You will also need a glass cutter or a jigsaw with a glass cutting blade to cut the opening in the glass door.

You will also need a tape measure to measure the door, a pencil to mark the position of the cat flap, painter's tape to protect the glass when cutting and special glass glue or screws to attach the flap. To complete the installation, silicone is needed to seal the flap and protect it from the weather.

Cost overview for cat flap and installation

The cost of a cat flap and its installation in a glass door can vary, depending on the type of flap and the complexity of the installation. A simple cat flap can cost between €16 and €140, while installation by a professional can cost an additional €100 to €400.

A detailed cost overview could look like this: The price for the cat flap itself is between €60 and €250, depending on the model and functions. Added to this are the costs for installation, which can be between €100 and €400, depending on the effort involved and the specialist. So, overall, you should expect total costs of between €160 and €650.

Cat flap in a rented apartment: What should you consider?

If you live in a rented property and want to install a cat flap in the glass door, there are a few important things to consider. First, you need to get your landlord's permission . Since installing a cat flap is often seen as a structural change, it's important to cover yourself in advance to avoid problems later.

To get your landlord's approval, you should be well prepared and clearly explain the benefits of a cat flap. Here are some points you could raise:

  • Explain how a cat flap reduces noise and disturbance because the cat can go in and out independently.
  • Offer to cover all costs for installation and any dismantling work .
  • Suggest making a written agreement that outlines all the details and terms.

It's also wise to take any concerns the landlord may have seriously and be proactive in offering solutions. Landlords may be concerned about issues such as safety and insulation. Show that you are willing to take steps to address these concerns, such as using safety-approved cat flaps and properly sealing the installation locations.

Burglar security of cat flaps in glass doors

A close up of a secure cat flap in a glass door with visible locks and reinforced edges showing the security features, in a well lit home environment, photographic, photography with sharp focus and detailed texture.

While cat flaps in glass doors offer convenience, they can also pose a security risk if not properly secured. To minimize the risk of break-ins, choose a cat flap that is specifically designed for high security. Look for models with robust materials and built-in security features such as locks or alarms that are activated if unauthorized access is attempted.

In addition to choosing a secure cat flap, you can take further measures to further protect your glass door:

  • Do not install the cat flap near door or window handles to make it more difficult for burglars to reach them.
  • Use safety glass or an additional security film on the glass to further reduce the risk of a break-in.
  • Consider installing an electronic cat flap that only allows access to your cat through its microchip or collar tag.

Removing a cat flap from the glass door

A cat reaches up to touch a person's hand.

If you need to remove your cat flap from the glass door, perhaps because you are moving house or your landlord requires it, dismantling it is quite simple. First, you should carefully remove all the screws that hold the cat flap in place. Be careful not to damage the glass by working slowly and carefully. It is important that you completely remove all parts of the flap, including the frames and seals.

After the cat flap has been removed, you need to clean the glass and check for damage. If the glass was damaged during dismantling, you should have it repaired or replaced by a professional. To close the opening in the glass door, you can either replace the original glass or have a suitable glass panel fitted. This will ensure that your glass door is fully functional and safe again.

Discover Flappies innovative cat flaps for your glass door

Flappie offers an innovative solution for cat flaps in glass doors that makes life much easier for cat owners. With selective access control and prey detection through camera and AI technology, your home stays clean and safe.

The advantages of this technology are clear:

  • Instant notifications via the Flappie app when your cat tries to come home with prey.
  • Ability to conveniently control settings and access rules via the app.
  • Insight into your cat's nighttime behavior through the camera, which also works in the dark.

Frequently Asked Questions

How much does it cost to install a cat flap in a glass door?

The cost of installing a cat flap in a glass door can vary. A basic cat flap costs between €16 and €140, and having a professional install it can cost an additional €100 to €400. So, in total, you can expect to pay between €160 and €650.

Can you install a cat flap in a pane of glass?

Yes, you can install a cat flap in a pane of glass. To do this, you first need to carefully measure the glass door and mark the position of the cat flap. Then, using a jigsaw and a special glass cutting blade, cut out the opening and install the cat flap.

Can you install a cat flap in a balcony door?

Yes, you can install a cat flap in a balcony door as long as it is a glass door. The installation process is similar to other glass doors: measure, mark, cut and mount the cat flap.

Which craftsman installs a cat flap?

Installing a cat flap in a glass door should ideally be carried out by a professional who has experience working on glass. This could be a glazier or a specialist tradesman who is familiar with fitting cat flaps in glass doors.