Cat Flaps Explained — How to Choose the Right Cat Flap for Your Home

Walk into any hardware store and you'll find a shelf full of cat flaps. Walk onto any glazing supplier's website and you'll find dozens more. The problem isn't choice — it's knowing what actually matters. This guide cuts through the noise and explains exactly what a cat flap is, what the key differences are between types, and how to choose the right one for your cat and your home.

What Is a Cat Flap?

A cat flap — also called a cat door or cat door flap — is a small opening fitted into a door, wall, or glass panel that allows a cat to pass through independently without needing a human to open the door. The flap swings open when pushed by the cat and closes again automatically.

Modern cat flaps are significantly more sophisticated than the simple hinged holes of previous decades. Today's best models use aircraft-grade polycarbonate flaps, brush seals, magnetic closures, and selective entry systems — delivering genuine insulation, security, and selective access in a single compact unit.

The Main Types of Cat Flap

There are four main types of cat flap available — each suited to different situations, budgets, and requirements:

Pet-Tek manufactures the standard manual flap and multi-magnetic options in both glass fitting and wood fitting configurations — engineered to a higher standard than anything else in their class.

Glass Fitting vs Wood Fitting — Which Do You Need?

Before choosing a specific model the most important decision is where the cat flap will be installed. This determines whether you need a glass fitting or wood fitting model.

What Makes a Good Cat Flap — The Features That Matter

Not all cat flaps are equal. These are the features that separate a quality cat flap from a cheap one:

Flap Material

The flap itself is the most important component. Cheap cat flaps use thin, flexible plastic that warps under UV, rattles in wind, and degrades rapidly. Quality cat flaps use rigid polycarbonate — ideally Bayer Makrolon®, the same material used in aircraft windows. A rigid flap holds its shape, holds its seal, and lasts for years without yellowing or cracking.

Brush Seals

Brush seals line the flap opening and trap air to prevent drafts. A cat flap without brush seals is essentially a permanent hole in your wall — especially in winter. All Pet-Tek Catwalk® models include dense brush seals on all four sides of the flap opening.

Magnetic Closure

A magnetic closure pulls the flap firmly shut after each use, ensuring it seats fully against the brush seals. Without magnetic closure, flaps can sit slightly ajar in wind — letting in cold air and noise.

4-Way Manual Lock

A 4-way lock gives you full control: open both ways, in only, out only, or fully locked. This is essential for keeping your cat in overnight, controlling access during bad weather, or fully securing the door when you're away.

UV Resistance

In New Zealand, Australia, and the UK, UV exposure is a major factor in cat flap degradation. UV-stabilised polycarbonate retains its clarity and structural integrity for years. Non-stabilised plastic yellows, clouds, and becomes brittle — and a degraded flap cannot seal properly.

The Pet-Tek Catwalk® Range — Models at a Glance

The Catwalk® range covers glass fitting, wood fitting and multi-magnetic options across multiple sizes and colours. Here's a quick overview of the key models:

Common Cat Flap Problems — and How to Avoid Them

Most cat flap problems come down to choosing the wrong type, the wrong size, or the wrong quality. Here are the most common issues and how to avoid them:

• Cat won't use the flap — usually a size issue (too small) or a material issue (flexible flap feels strange on their back). Polycarbonate rigid flaps are much better accepted by cats than soft vinyl flaps.
• Drafts and rattling — caused by no brush seals, no magnetic closure, or a warped flap. All three are solved by choosing a quality model with proper sealing.
• Other cats getting in — the only permanent solution is a multi-magnetic cat door. Manual locking only works when you are home to manage it.
• Flap yellowing or cracking — caused by UV degradation of cheap plastic. UV-stabilised polycarbonate does not yellow or crack.
• Poor fit in double glazing — always check the glass thickness compatibility before purchasing. Pet-Tek glass fitting models cover 3mm to 32mm — see our cat flaps in double glazed glass guide for full details.

Frequently Asked Questions

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