Cat Flap in a Glass Door — Specialist Fitting
Want a cat flap in your glass door? We're the UK specialists. Because toughened glass can't be cut, we supply a brand-new toughened glass panel with the cat flap aperture pre-cut and pre-toughened, then fit it into your existing patio, French, sliding or bi-fold door frame. Fixed-price quotes from £280, fully guaranteed.
How a Cat Flap in a Glass Door Is Fitted
Existing toughened glass can't be cut — it would shatter. So fitting a cat flap in a glass door means replacing the affected pane with a new toughened panel that has the cat flap aperture cut before it's toughened. We measure your existing glass, order a like-for-like replacement, then swap the panel and install your chosen cat flap with a fully weatherproof seal.
- New toughened glass panel supplied & fitted
- Single, double or triple glazed sealed units
- Patio, French, sliding, bi-fold & side panels
- Cat flap hole pre-cut before toughening
- SureFlap, Pet-Tek, PetSafe & Closer Pets compatible
- Weatherproof seal + 3-year workmanship guarantee
Which Glass Doors We Fit
We fit cat flaps in every common glass door type in the UK: patio doors (sliding and hinged), French doors, bi-fold doors, conservatory doors, glass side panels, and fully glazed back doors. Whether your glass is single, double or triple glazed, the method is the same — a brand-new sealed unit, manufactured with the hole already in it.
Pricing starts from £280. For a detailed breakdown read our glass door cost guide.
Cat Flap in Glass Door — FAQs
Our Installation Services
Glass Door Guides
Can You Put a Cat Flap in a Sliding Patio Door?
Sliding patio doors are trickier than standard French doors, but a cat flap is absolutely possible. Here's how we do it and what your options are.
Buyer's GuidesCan You Put a Dog Flap in a Glass Door? (UK Guide 2026)
The short answer is yes — and it's more common than you think. Here's how a dog flap is fitted into a glass patio or French door in the UK, which brands work best, and what to budget.
Buyer's GuidesCan You Put a Cat Flap in a Glass Door? (UK Guide 2026)
The short answer is yes — but not by cutting your existing glass. Here's how a cat flap in a glass door is actually fitted in the UK, what it costs, and how long it takes.
How-to GuidesWhy Toughened Glass Cannot Be Cut for a Cat Flap (And What We Do Instead)
Every week we get asked 'can't you just cut a hole in our existing glass?'. The honest answer is no — and here's the materials-science reason why, with what we do instead.
Get a Free Cat Flap in Glass Door Quote
Send us a photo of your glass door and we'll provide a fixed-price quote within 24 hours.