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

A microchip cat flap is one of the best investments you can make for your cat and your home. Unlike traditional cat flaps that allow any animal to enter, a microchip cat flap only opens for your own cat by recognising their unique implanted microchip. This keeps unwanted cats, foxes and other animals outside while giving your pet the freedom to come and go whenever they choose.

Whether you're replacing an old manual cat flap or fitting one for the first time, choosing the right model can seem confusing. Different doors require different installation methods, some cat flaps offer more features than others, and it's important to select a model that's compatible with both your cat and your property.

At CatFlaps.co.uk, we've specialised in pet doors and cat flaps since 2003. We've supplied thousands of homeowners, builders, glaziers and installers across the UK, giving us the experience to help you choose the right microchip cat flap for virtually any installation.

What Is a Microchip Cat Flap?

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

When your cat approaches the flap, a scanner detects the unique identification number stored within the microchip. If the number has been programmed into the cat flap, the locking mechanism releases automatically, allowing your cat to enter.

If an unknown animal approaches, the flap remains securely locked.

The result is a simple but highly effective way of giving your pet freedom while protecting your home.

How Does a Microchip Cat Flap Work?

Every cat should be microchipped with a unique identification number.

Most microchip cat flaps are compatible with standard ISO 11784/11785 FDX-B microchips, which are used by the vast majority of UK veterinary practices.

Programming is straightforward.

Simply place the flap into learning mode, encourage your cat to use it once, and the flap stores the chip number permanently in its memory.

Many models can remember:

• One cat
• Two cats
• Four cats
• Up to 40 cats on premium models

This makes them suitable for both single-pet households and busy multi-cat homes.

Why Choose a Microchip Cat Flap?

The biggest advantage is security.

A standard cat flap allows any animal to enter.

That may include:

• Neighbourhood cats
• Stray cats
• Foxes
• Other wildlife

Unfortunately, unwanted visitors often:

• Eat your cat's food
• Spray inside your home
• Fight with resident pets
• Cause stress and anxiety
• Spread fleas and disease

A microchip cat flap prevents these problems by recognising only authorised pets.

Benefits of Microchip Cat Flaps

Greater Home Security

Only registered pets can unlock the flap.

Unknown animals remain outside.

No Collar Required

Unlike magnetic or infrared cat flaps, most microchip cat flaps use your cat's existing implanted microchip.

There are:

• No collars to lose
• No batteries in collars
• No hanging tags

Your cat already carries the identification permanently.

Ideal for Multiple Cats

Most models store multiple chip numbers.

Perfect for households with:

• Two cats
• Three cats
• Rescue homes
• Breeders

Every authorised pet can use the same flap.

Four-Way Locking

Most models include manual locking options:

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

This allows complete control whenever required.

Curfew Mode

Many premium models include programmable timers.

You can automatically:

• Keep cats indoors overnight
• Allow morning access
• Lock during fireworks
• Restrict access during veterinary recovery

No manual locking required.

Better Weather Protection

Modern microchip cat flaps feature:

• Brush seals
• Magnetic closing
• Improved insulation
• Weather-resistant materials

Helping reduce draughts and improve energy efficiency.

Are Microchip Cat Flaps Safe?

Yes.

Microchip cat flaps simply read the identification number already stored within your cat's implanted microchip.

They do not transmit electricity into the animal.

They do not alter the chip.

They simply recognise it.

Millions of cats worldwide use microchip-operated pet doors every day.

Which Doors Can They Be Installed Into?

One of the most common questions we receive is whether a microchip cat flap will fit a particular door.

The answer is usually yes.

Different installations simply require different accessories.

uPVC Doors

Most modern uPVC doors can accommodate a microchip cat flap.

Depending on the construction, you may need:

• A replacement panel
• Mounting adaptor
• Tunnel extension

We always recommend checking whether the panel contains steel reinforcement before cutting.

Composite Doors

Composite doors are thicker and stronger than standard uPVC panels.

Many microchip cat flaps can be fitted successfully, although installation often requires careful planning due to reinforcement and internal construction.

Timber Doors

Wooden doors remain one of the easiest installation options.

The flap is cut directly into the timber and secured with the supplied fixing screws.

Glass Doors

Microchip cat flaps can also be fitted into glass.

However, the hole must be manufactured into a new double-glazed unit before the glass is toughened.

Existing toughened glass cannot usually be cut afterwards.

If you're replacing glass, it's important to order the correct hole size for your chosen cat flap.

Walls

Wall installations are becoming increasingly popular.

A wall-mounted microchip cat flap provides excellent flexibility and allows doors to remain untouched.

These installations normally require:

• Tunnel extensions
• Wall liners
• External weather protection

Choosing the Right Size

Your cat should be able to walk through comfortably without squeezing.

Measure:

• Width
• Height
• Shoulder height
• Weight

Large breeds such as Maine Coons may require larger flap openings than standard domestic cats.

Some smaller dogs can also use larger microchip cat flaps.

Battery Life

Most microchip cat flaps operate using standard AA batteries.

Typical battery life ranges from:

• 6 months
• 9 months
• Up to 12 months

depending on:

• Usage
• Battery quality
• Temperature

Many models include low battery warning indicators.

Can They Work During a Power Cut?

Yes.

Most models are battery powered rather than mains powered.

This means they continue operating normally even during electrical outages.

Can More Than One Cat Use the Same Flap?

Absolutely.

Many models store:

• 20 microchips
• 30 microchips
• Up to 40 microchips

Ideal for multi-pet households.

Are Microchip Cat Flaps Better Than Magnetic Cat Flaps?

Both have advantages.

Magnetic Cat Flaps

• Lower purchase price
• Collar operated
• Good basic security

Microchip Cat Flaps

• No collar required
• Better security
• More reliable identification
• Curfew options
• Multiple cat memory
• Advanced locking

For most households, microchip cat flaps provide the best long-term solution.

Common Questions

Will it work with my cat's microchip?

Most modern cat flaps work with standard ISO microchips used throughout the UK.

Always check compatibility before purchasing.

What if my cat isn't microchipped?

Some manufacturers offer RFID collar tags that can be programmed instead.

However, we strongly recommend microchipping for permanent identification.

Will it stop foxes?

Yes.

Unless the fox carries one of the programmed microchips, the flap remains locked.

Can kittens use them?

Yes.

Once a kitten has been microchipped, they can normally be programmed into the flap immediately.

Do they need maintenance?

Very little.

Simply:

• Replace batteries when required.
• Keep the scanner clean.
• Remove dirt from the seals occasionally.
• Check moving parts periodically.

Why Buy from CatFlaps.co.uk?

Since 2003, we've specialised exclusively in cat flaps, dog doors and pet access solutions.

Our experience covers everything from straightforward DIY installations to complex projects involving glass, walls, composite doors and commercial buildings.

When you buy from us, you benefit from:

• Over 20 years of specialist knowledge.
• A carefully selected range from trusted manufacturers.
• Advice for timber, uPVC, composite, glass and wall installations.
• Genuine UK products.
• Fast nationwide delivery.
• Friendly expert support before and after your purchase.

Whether you're fitting your first microchip cat flap or replacing an older model, we're here to help you choose the right solution for your home, your door and your cat.

Browse our range of microchip cat flaps today and enjoy the peace of mind that comes with secure, selective pet access.

What Is a Microchip Cat Flap?

A microchip cat flap uses radio frequency identification (RFID) technology to scan your cat’s implanted microchip. When your cat approaches, the flap unlocks automatically. If the microchip isn’t recognised, the flap stays securely locked.

This means:

• No more stray cats entering your home
• No need for collars or tags
• Greater security and peace of mind

Key Benefits of Microchip Cat Flaps

• Selective Entry: Only your registered pets can enter
• Multi-Pet Friendly: Store multiple microchip IDs
• No Collar Required: Works with your cat’s existing chip
• Improved Security: Keeps out unwanted animals
• Low Maintenance: Battery-operated with long life

Best Microchip Cat Flap for Your Needs

Choosing the right microchip cat flap depends on where you’re installing it and how your pet uses it.

For UPVC & Composite Doors

Most standard microchip cat flaps fit directly into UPVC panels. For reinforced or slatted panels, additional adaptors may be required.

For Glass Doors & Windows

Installation into glass requires a pre-cut hole in a new double-glazed unit. We recommend checking the hole size requirements before ordering.

For Walls

Wall installations require extension tunnels to bridge the thickness. This is ideal if you want to keep doors intact or improve insulation.

Microchip vs Magnetic Cat Flaps

Verdict: Microchip cat flaps are the best choice for most homes due to their reliability and security.

Best Microchip Cat Flap for Each Situation”

• For UPVC doors
• For glass (new unit required)
• For walls (tunnel kits)
• For multiple cats

Installation Advice

We supply microchip cat flaps suitable for:

• UPVC doors
• Composite doors
• Wooden doors
• Glass panels (new unit required)
• Walls (with tunnel extensions)

If you're unsure which product is right, our team can help you choose the correct model based on your setup.

What are the catflap options to go into the glass panels

Why Buy From Catflaps.co.uk?

• Established UK supplier since 2003
• Trusted by homeowners and trade professionals
• Wide range of leading brands and models
• Expert advice on installation and compatibility
• Fast UK delivery available

Frequently Asked Questions

Can a microchip cat flap read all microchips?

Most models support the common UK and EU microchip formats (FDX-B). Always check compatibility if unsure.

How many cats can be programmed?

Most microchip cat flaps can store multiple pets, typically between 20 and 40 microchip IDs.

Do microchip cat flaps need power?

Yes, they are battery-operated. Battery life typically lasts several months, depending on usage.

Can they be fitted into existing glass?

No — a new double-glazed unit with a pre-cut hole is required.

Do microchip cat flaps work with all cats?

They work with cats that have a compatible implanted microchip. If your cat is not microchipped, some models may work with a separate collar tag, depending on the product.

Will a microchip cat flap stop other cats from coming in?

Yes. Once programmed, the flap should only unlock for registered pets and remain closed to unknown cats.

Can I fit a microchip cat flap myself?

Many door installations can be handled by a competent DIY user. Glass and wall installations are usually better handled by a professional installer.

Do microchip cat flaps need batteries?

Yes. Most microchip cat flaps are battery-powered. Battery life varies depending on the model, usage and number of pets.

Find the Right Microchip Cat Flap Today

Browse our full range of microchip cat flaps below, with options to suit every door type and budget. If you need help choosing, contact our team for expert advice.