Pet-Tek Cat Flap — Glass Door Specialist, Supplied & Fitted
The only cat flap purpose-built for glass doors. Pet-Tek's transparent, circular design blends almost invisibly into patio doors, French doors and side panels — no ugly rectangular plastic panel disrupting your view. We supply and fit every Pet-Tek model, including the new toughened glass panel with the aperture pre-cut. Compare with SureFlap or PetSafe microchip options, or see our glass door fitting page for more.
Why Choose Pet-Tek?
Pet-Tek is a specialist manufacturer of pet doors designed specifically for glass installations. Unlike brands like SureFlap and PetSafe — whose flaps are primarily designed for solid doors and adapted for glass — Pet-Tek starts with glass as the primary material and engineers everything around it.
Their transparent, round-profile design sits flush within the glass panel, creating a seamless look. The flaps are manufactured from high-impact polycarbonate — the same grade used in aircraft windows and riot shields — making them virtually indestructible. Available in a range of sizes for cats and small to medium dogs.
Important note: Pet-Tek flaps are manual (non-microchip). They use a 4-way locking mechanism but don't have selective entry based on microchip. If you need microchip security, we'd recommend SureFlap or PetSafe instead — we fit all brands into glass doors.
- Designed specifically for glass doors — not adapted, purpose-built
- Transparent round-profile — almost invisible in glass
- High-impact polycarbonate — virtually indestructible
- Range of sizes for cats & small-medium dogs
- Weather-sealed with magnetic closure
- Flush-mount design minimises gaps & draughts
- Compatible with double & single glazing
- 4-way manual locking: in, out, both or locked
- UV-stabilised — won't yellow or cloud over time
Ideal For Glass Doors
Pet-Tek flaps are our most popular choice for glass door installations where microchip security isn't needed. The transparent design means the flap blends seamlessly with your glass panel, and the round profile provides excellent weather sealing. We supply and fit Pet-Tek in a brand-new toughened glass panel with the aperture pre-cut at the factory.
Transparent Design
Clear polycarbonate flap blends into your glass — no opaque plastic panel disrupting the view through your door.
Weather Sealed
Magnetic closure, flexible seal and flush-mount fitting combine to keep rain, wind and draughts outside where they belong.
Multiple Sizes
From standard cat flaps to medium dog doors — there's a Pet-Tek model for virtually every pet size.
Request a Callback
Prefer to talk? Leave your name and number and we'll call you back — usually within a few hours.
Pet-Tek Models Compared
Pet-Tek offers a range of sizes to suit cats and dogs. Here's what we install most often:
G-SDDW Cat Flap
Best for: Standard cats & small dogs
Opening: ~165mm diameter
RRP: From ~£45
- Transparent polycarbonate flap
- 4-way manual lock
- Magnetic weather seal
- Fits single & double glazing
- High-impact construction
G-SDDB Medium Dog Door
Best for: Medium dogs & large cats
Opening: ~215mm diameter
RRP: From ~£65
- Larger round opening
- Same transparent design
- 4-way manual lock
- Reinforced hinge
- Fits single & double glazing
G-SDDL Large Dog Door
Best for: Large dogs
Opening: ~285mm diameter
RRP: From ~£85
- Maximum opening size
- Heavy-duty polycarbonate
- 4-way manual lock
- Extra-strong magnetic seal
- Fits single & double glazing
Door Types We Fit Pet-Tek Into
Pet-Tek excels in glass but can be fitted into most door types. Here's what's involved:
Glass Patio & French Doors
Pet-Tek's natural home. We replace one glass panel with a brand-new toughened safety glass unit, pre-cut with the exact circular aperture for your chosen Pet-Tek model. Your existing frame stays in place. This is our most popular Pet-Tek installation.
Typical install time: 1–2 hours
Learn more →UPvc Doors
Possible with an adapter plate, though most UPvc customers prefer a rectangular flap like SureFlap or PetSafe for a cleaner look. We assess the panel thickness and advise on-site.
Typical install time: 45–90 minutes
Learn more →Composite Doors
Similar to UPvc — doable with the right adapter, but rectangular flaps generally integrate better with the flat GRP skin. We can show you both options during a free quote visit.
Typical install time: 45–90 minutes
Learn more →Wooden Doors
Wooden doors are the simplest installation. We cut a clean circular aperture with a hole saw and router, then mount the Pet-Tek flush with the surface. Both solid timber and hollow-core doors are suitable.
Typical install time: 30–60 minutes
Learn more →How We Install Pet-Tek in Glass Doors
Our glass door Pet-Tek installation is a clean, professional process:
- 1
Measure & Quote
Send us a photo of your glass door and we'll measure up and provide a fixed-price quote. We need the glass panel dimensions and your pet's size to specify the correct Pet-Tek model. Use our [cost calculator](/cost-calculator) for a quick estimate.
- 2
Order Glass
We order a brand-new toughened safety glass panel with the circular Pet-Tek aperture pre-cut at the factory. This typically takes 5–10 working days.
- 3
Swap the Panel
On installation day, we carefully remove your existing glass panel from the frame and fit the new pre-cut panel in its place. Your door frame isn't touched or modified.
- 4
Fit the Pet-Tek
The Pet-Tek flap assembly is mounted into the pre-cut aperture and sealed. We test the 4-way lock, check the magnetic closure and ensure a weather-tight seal.
- 5
Dispose & Clean Up
We safely dispose of your old glass panel, clean the new glass and leave your home spotless. The whole process typically takes 1–2 hours.
Pet-Tek vs SureFlap vs PetSafe — Which Should You Choose?
This depends on your door type and priorities. Pet-Tek is unbeatable for glass door aesthetics — the transparent circular design is purpose-built and virtually invisible. SureFlap is the UK market leader for microchip security, with higher ratings and app-controlled options. PetSafe offers the best value, with manual flaps from just £15 and microchip models cheaper than SureFlap.
Our recommendation: For glass doors where looks matter and you don't need microchip control, go Pet-Tek. For microchip security in any door, go SureFlap. For budget-conscious buyers, go PetSafe. Either way, we supply and fit all brands — just request a quote and we'll help you choose.
Pet-Tek Installation FAQs
Request a Callback
Prefer to talk? Leave your name and number and we'll call you back — usually within a few hours.
Get a Free Pet-Tek Installation Quote
Send us a photo of your glass door and we'll provide a fixed-price quote — no obligation, no call-out fees.