Cat Flap Co.

    Bi-Fold Door Cat Flap Fitting

    Cat flaps fitted into aluminium and uPVC bi-fold doors using a brand-new toughened glass unit with the aperture pre-cut — your frame, track and folding action stay exactly as they were.

    How a Bi-Fold Install Works

    1. 1. Survey. We identify the best leaf — usually the fixed or traffic panel — and measure the sealed unit, glass spec and spacer colour.
    2. 2. Manufacture. A new toughened double-glazed unit is made to match, with the cat flap hole cut before toughening.
    3. 3. Fit. We remove the old unit, bed in the new one, fit the flap and re-check the fold, lock and drainage.
    • Aluminium, uPVC and composite bi-folds
    • Matched glass spec, low-E coating & spacer colour
    • Track, rollers and hardware untouched
    • Weathertight, factory-standard finish
    • Round-adaptor flaps (Pet-Tek, SureFlap) recommended
    • From £280 including the new toughened pane
    Grey round cat flap fitted into a new toughened glass panel in an anthracite bi-fold door

    Bi-Fold Cat Flap FAQs

    Our Installation Services

    Glass Door Cat Flap FittingUPvc Door Cat Flap FittingComposite Door Cat Flap FittingWooden Door Cat Flap FittingAluminium Door Cat Flap FittingWindow Cat Flap FittingPatio Door Cat Flap FittingFrench Door Cat Flap FittingDog Door FittingMicrochip Dog Door FittingAI & Prey Detection Cat FlapsConservatory Cat Flaps

    Areas We Cover

    ManchesterLiverpoolChesterWarringtonStockportCreweMacclesfieldWirralWrexhamStoke-on-TrentStaffordHuddersfieldBradfordLeedsView all areas →

    Bi-Fold & Glass Guides

    Installation Guides

    Cat Flap in a Bi-Fold Door: Yes — Here's How (UK Installer's Guide)

    Bi-fold doors look stunning — and yes, you can fit a cat flap in them. Here's how professional installers do it: a new toughened glass unit with the aperture pre-cut, fitted discreetly in the corner of the panel. Pet-Tek works beautifully.

    How-To Guides

    How to Install a Pet Door in a Glass Door (UK Step-by-Step Guide)

    Installing a pet door in a glass door is not a DIY job — toughened glass can't be cut on-site. Here's exactly how professional UK installers do it, what you'll pay, and how long it takes.

    Buyer's Guides

    Do I Need FENSA to Replace a Glass Unit With a Cat Flap? (UK Guide)

    FENSA certificates are for replacement windows and doors — not for swapping a sealed glass unit. Fitting a cat flap into a new toughened pane is classed as a repair and falls outside FENSA's remit. Here's exactly what FENSA's own website says, and what you actually need instead.

    How-to Guides

    Why 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 Bi-Fold Cat Flap Quote

    Send a photo of your bi-folds and we'll confirm the best panel and price within 24 hours.

    Request Your Free Quote Call 07764 442054