Microchip Cat Flaps – The Complete Guide to Choosing the Right One

A microchip cat flap is one of the most effective ways to give your cat freedom while helping to keep unwanted animals outside. Unlike a standard cat flap, a microchip model reads your cat's implanted identification chip and unlocks for registered pets.

This makes microchip cat flaps particularly useful in homes where neighbouring cats, strays or other animals regularly enter through a conventional flap.

At CatFlaps.co.uk, we've specialised in cat flaps, dog doors and pet access products for many years. Our experience covers straightforward door installations as well as more complex applications involving uPVC panels, composite doors, glass and walls.

What Is a Microchip Cat Flap?

A microchip cat flap is an electronic pet door that reads the identification number stored within your cat's implanted microchip.

When a registered cat approaches, the reader detects the microchip and releases the locking mechanism. An unregistered animal does not receive the same authorised access.

Once programmed, normal operation is automatic and your cat can use the flap in much the same way as a conventional pet door.

How Does a Microchip Cat Flap Work?

Most modern microchip cat flaps are designed to work with common pet microchip formats used in the UK and Europe.

Programming is normally straightforward. The flap is placed into learning mode and the cat is introduced to the reader so the identification number can be stored in memory.

Many models can register multiple pets, making them suitable for households with more than one cat.

The number of stored microchips varies by model, so always check the individual product specifications if you have a larger multi-cat household.

Why Choose a Microchip Cat Flap?

The biggest advantage is selective entry. A conventional manual cat flap may be used by any suitably sized animal, while a microchip cat flap is designed to recognise authorised pets.

This can help reduce problems caused by unwanted visitors such as:

• Neighbouring cats entering your home
• Stray cats eating your pet's food
• Territorial spraying
• Fighting between cats
• Resident pets becoming stressed by intruders

Benefits of Microchip Cat Flaps

No Collar Required

Most models can use your cat's existing implanted microchip, so there is normally no need for a special collar key.

This avoids the inconvenience of lost collars or hanging electronic tags.

Suitable for Multiple Cats

Many microchip cat flaps can store several microchip numbers, allowing multiple authorised pets to use the same flap.

This makes them a practical choice for multi-cat households.

Selective Entry

The flap is designed to unlock for registered pets rather than remaining freely accessible to every animal outside.

4-Way Locking

Many models also include manual locking controls such as:

• In & Out
• In Only
• Out Only
• Fully Locked

The exact locking options vary by product.

Timer & Curfew Functions

Selected premium models include programmable timers or curfew functions that can automatically change the access setting at particular times.

This can be useful if you want your cat to have outdoor access during the day but remain indoors overnight.

Are Microchip Cat Flaps Safe?

Microchip cat flaps simply read the identification number stored within a compatible implanted pet microchip.

They do not alter the microchip or send electrical stimulation into the animal. The reader is used only to identify authorised pets and operate the locking mechanism.

Which Doors Can Microchip Cat Flaps Be Installed Into?

Microchip cat flaps can be installed into a wide range of doors and walls, although the fitting method depends on the construction of the property and the individual cat flap.

uPVC Doors

Many microchip cat flaps can be installed into suitable uPVC door panels.

Depending on the panel and product, you may need:

• A mounting adaptor
• A replacement door panel
• A tunnel extension

Always check the construction and thickness of the door panel before cutting.

Composite Doors

Composite doors can be thicker and more complex than simple uPVC panels. Many microchip cat flaps can still be fitted, but reinforcement and internal construction need to be considered carefully before cutting.

Timber Doors

Wooden doors are often one of the simplest installations. The required opening can normally be cut directly into suitable timber and the cat flap secured using the supplied fixings.

Glass Doors & Windows

Selected microchip cat flaps can be installed into glass using the correct mounting adaptor.

Existing toughened or double-glazed glass should not normally be cut after manufacture. A replacement glass unit usually needs to be ordered with the required opening already incorporated before toughening and assembly.

Always confirm the required hole diameter for your chosen cat flap before ordering replacement glass.

Walls

Many microchip cat flaps can also be installed through walls using compatible tunnel extensions or wall liners.

Measure the total wall thickness before ordering and check how much depth is provided by the flap itself and by each extension section.

Choosing the Right Size

Your cat should be able to pass through the opening comfortably without squeezing.

Before ordering, check:

• Your cat's body width
• Shoulder height
• Overall flap opening size
• Required installation height

Large breeds such as Maine Coons may require a larger flap opening than an average domestic cat.

Some larger microchip pet doors may also be suitable for selected small dogs.

Battery Life

Most microchip cat flaps are battery powered rather than connected to the mains.

Battery life depends on the individual product, the quality of the batteries, usage and environmental conditions.

Many models include a low-battery warning so you can replace the batteries before normal operation is affected.

Will a Microchip Cat Flap Work During a Power Cut?

Most microchip cat flaps use replaceable batteries, so they are not normally dependent on your home's mains electricity supply.

Always check the power requirements of the individual model before ordering.

Can More Than One Cat Use the Same Flap?

Yes. Many microchip cat flaps are designed to store multiple microchip numbers.

This allows several authorised cats to use the same pet door while unregistered animals remain restricted.

Microchip Cat Flap or Magnetic Cat Flap?

Both systems offer more controlled access than a conventional manual flap, but they work differently.

Magnetic Cat Flaps

• Usually lower purchase price
• Operate using a magnetic collar key
• No implanted microchip required
• Simple mechanical operation

Microchip Cat Flaps

• Normally use your cat's implanted microchip
• No special collar usually required
• Can store several authorised pets
• Selected models offer timers and more advanced controls
• Provide individual identification rather than relying on a generic magnet

If unwanted cats entering your home is the main problem, a microchip cat flap is generally the more advanced selective-entry option.

Microchip Cat Flap or Manual Cat Flap?

If you simply want your cat to come and go and unwanted animals are not a problem, a manual cat flap may be all you need.

If you want the flap to recognise authorised pets before unlocking, choose a microchip model.

Common Questions

Will a microchip cat flap work with my cat's chip?

Most current models support common pet microchip formats, but compatibility varies. Always check the specification of the individual cat flap if you are unsure.

What if my cat isn't microchipped?

Some models can also work with a compatible RFID collar tag. Check the individual product description for availability.

Will a microchip cat flap keep other cats out?

It is designed to restrict normal entry to registered pets. As with any pet door, it should not be considered an absolute security barrier against every possible animal or situation.

Can kittens use a microchip cat flap?

Yes, provided the kitten has a compatible microchip and is large enough to use the flap safely and comfortably.

Do microchip cat flaps need maintenance?

Very little, but regular basic care is worthwhile.

• Replace batteries when required
• Keep the microchip reader area clean
• Remove dirt and pet hair from seals and moving parts
• Check the flap movement periodically

Why Buy from CatFlaps.co.uk?

Choosing the correct microchip cat flap is about more than simply comparing prices. The size of your pet, the construction of the door and the type of access control you need all matter.

CatFlaps.co.uk specialises in cat flaps, dog doors and pet access products and can help with:

• uPVC door installations
• Composite doors
• Timber doors
• Glass installations
• Wall installations
• Replacement flaps and accessories
• Choosing between manual, magnetic and microchip models

If you're unsure which model is right for your home, contact us and we'll be happy to help.

Find the Right Microchip Cat Flap

Browse our range of microchip cat flaps and electronic cat doors below. Compare opening sizes, access controls, installation requirements and available accessories to find the most suitable model for your cat and your home.

Popular Microchip Cat Flap Installations

Microchip Cat Flaps for uPVC & Composite Doors

Browse suitable microchip cat flaps for door and panel installations. Check panel thickness and any adaptor requirements before cutting.

Microchip Cat Flaps for Glass

Glass installations require a correctly manufactured opening in a replacement glass unit. Check the required diameter and adaptor before ordering the glazing.

Microchip Cat Flaps for Walls

Wall installations normally use compatible tunnel extensions to bridge the depth between the inside and outside sections of the cat flap.

Read our guide to cat flap options for glass panels.