Cat & Dog Flaps for Internal Doors

Give your pets the freedom to move between rooms with our range of cat and dog flaps for internal doors. An indoor pet door can provide convenient access to bedrooms, utility rooms, kitchens and other areas of the home without having to leave the complete door open.

Whether you need a simple opening for a cat, a small dog door or a lockable internal pet flap, choosing the right design depends on your pet's size, the thickness of the door and whether you want unrestricted or controlled access.

Why Fit a Pet Flap in an Internal Door?

An internal cat flap or dog flap allows your pet to move independently around the home while still allowing you to close individual doors.

This can be particularly useful for providing access to:

• Utility rooms
• Kitchens
• Bedrooms
• Hallways
• Rooms containing food, water or litter trays
• Separate areas used for sleeping

It can also mean you don't have to continually open doors for a cat or dog that likes moving between different parts of the house.

Choosing the Right Internal Cat or Dog Flap

There are several ways of providing pet access through an internal door. The best choice depends on how you use the room and whether you need to control your pet's movements.

Open Internal Pet Doors

A simple open pet doorway provides unrestricted access between rooms. With no moving flap for your pet to push, this can be particularly useful for cats, puppies, smaller dogs and pets that are nervous about using a conventional flap.

Closing Pet Flaps

A conventional flap closes behind your pet after they pass through. This can be useful in older properties or rooms where you want to keep the main door closed and help reduce the movement of draughts between different areas of the home.

Lockable Internal Cat & Dog Flaps

A lockable pet flap gives you greater control. Depending on the individual model, you can close or lock the flap when you don't want your pet entering a particular room.

This can be useful overnight or when temporarily separating pets from particular areas of the house.

Check Your Internal Door Before Ordering

Internal doors vary considerably in their construction and thickness. Some lightweight hollow or panel doors may only have thin facing material, while solid timber doors can be considerably thicker.

Before ordering an internal pet door, check:

• Door Thickness – Make sure the pet flap is suitable for the thickness of your door.
• Pet Size – Measure your cat or dog rather than relying solely on breed.
• Opening Size – Check the actual flap or passage dimensions.
• Door Construction – Establish whether the door is hollow, panelled or solid.
• Locking Requirements – Decide whether you need unrestricted access or the ability to close the pet door.

Cat Flaps for Internal Doors

An internal cat flap can be particularly useful when your cat's food, bed or litter tray is kept in a separate room.

Instead of leaving the main door permanently open, your cat can move between rooms independently while you retain the ability to close the door.

For cats that are reluctant to push a conventional flap, an open internal pet doorway can provide an especially simple solution.

Dog Flaps for Internal Doors

Internal pet doors aren't just for cats. We also offer options suitable for small and medium dogs, allowing them to move between suitable areas of the home without requiring someone to continually open the door.

Always measure your dog carefully and compare their dimensions with the opening size shown on the individual product before ordering.

Installing a Pet Flap in an Internal Door

Fitting a pet flap into many internal doors is a straightforward DIY project, although the installation method depends on the construction of the door.

Before cutting, carefully check the position of any panels, framing or internal reinforcement. Measure the required cut-out accurately and follow the installation instructions supplied with your chosen pet door.

Find the Right Indoor Pet Door

Browse our range of cat flaps and dog flaps for internal doors below. You'll find simple pet openings together with closing and lockable options designed to make it easier for your pets to move around the home.

Check the dimensions and recommended door thickness on each product before ordering. If you're unsure which pet flap will work with your internal door, contact CatFlaps.co.uk and we'll be happy to help.