Bifold Door FAQs
Everything You Need to Know About Our Bifold Doors
What makes a great bifold door?
Three things: how much glass you see, how easily it moves, and how solid it feels when closed. Our Versatali system wins on all three. The sightlines are slim, so a five-panel run is mostly glass. The panels ride on stainless steel rollers, so one finger moves the whole wall. And when you close it, multi-point locks clamp every panel to the frame — it feels, and tests, like a fixed wall.
How many panels do I need?
A rule of thumb: each panel is 700 mm to 1,200 mm wide. A 2-panel bifold suits openings from about 1.8 m. Three or four panels suit the typical 3 m rear opening. Five to seven panels build a full glass wall across a big extension. Odd numbers let one panel work as a traffic door — open it like a normal door for the school run without folding the whole run back.
Will it be cold in winter?
No. Every panel is thermally broken aluminium with argon-filled double glazing and warm-edge spacers. U-values start at 1.2 W/m²K — better than Building Regulations demand — and drop further with triple glazing. The triple gaskets and weather-brushed track keep draughts out even on exposed sites.
Is a bifold secure?
Ours are PAS 24 tested — the British break-in standard. You get multi-point shoot bolts on every panel, anti-lift rollers, internally beaded glass and key-locking handles. Add laminated glass for the highest spec.
Level threshold — no step, no trip
Choose a low aluminium threshold recessed into the floor and the inside flows into the garden with nothing to step over. It is Part M friendly for accessibility, safe for small children, and it makes the space feel twice the size when open.
Supply-only or fitted — your call
Homeowners usually choose supply-and-fit: our in-house team measures, installs, seals and hands over with a 10-year guarantee. Builders and installers buy supply-only at trade prices: frames arrive square, pre-gasketed, sized to the millimetre, with a full technical pack. Same doors, same guarantee, your choice.
Ready to fold the wall away?
Get your free, itemised bifold quote today. WhatsApp a photo of your opening to
+44 7538 781235 or use the form above — a written price comes back within 24 hours
GET MY BIFOLD PRICE
Your call
We can fit them for you - or your builder can
Full supply and fit
Our in-house installation team handles measuring, fitting and aftercare. One guarantee covers the lot. Perfect for homeowners who want a stress-free, white-glove experience - and most of our single-site residential work is done this way.
Supply only to trade
Builders, installers and main contractors get trade pricing, engineered drawings, a detailed technical pack and a dedicated phone number. Product arrives pre-gasketed, square and ready to fit. Used by dozens of builders across the Midlands every month.
Mixed delivery
Some main contractors choose us because we can switch between supply-only and supply-and-fit on the same job. That flexibility means no trade disputes about scope, and a single point of accountability.
The Range
Explore the Range
More glass, less frame, and a door that works as hard in January as it does in July. Here is what sets ours apart.
Decorative Glazing
Bevels, leads, bars and textured glass — privacy levels and patterns to make every pane yours.
Explore decorative glazing
Glass Internal Doors
Bifold, sliding or pivot internal glazing — open-plan when you want it, quiet when you don’t.
Styles
bifold/slide/pivot
Explore glass internal doors
Replacement Conservatory Roof
Tiled, glass or hybrid roofs — turn the hottest-coldest room in the house into the favourite one.
Options
tiled/glass/hybrid
Explore replacement conservatory roof
Kitchen Extensions
Full-build rear and side extensions with trusted partner builders — concept to keys.
Explore kitchen extensions
Flush Windows
Completely flat external face — sash level with frame for a pure minimalist elevation.
Explore flush windows
Stepped Windows
Sculpted stepped profiles create layered shadow lines and real architectural presence.
Explore stepped windows
GWS Hybrid
Deliberate mixed spec: aluminium at the front, uPVC behind — same colour, smaller bill.
Explore GWS hybrid
Blogs & guides
Free reading before you buy
New to aluminium doors and windows? The blog covers the most-asked questions we hear every week. How much does a bifold cost? Do I need Part L compliance on a conservatory? Astragal bars or Georgian bars? What is a thermal break? How to pick a front door panel. Read up and come back to us with sharp questions.
Read the blog
About Glazed Window Systems Ltd
One team, one guarantee, one mission - every UK home sealed in aluminium
Glazed Window Systems Ltd is a West Midlands aluminium door and window specialist. We were founded on a simple idea: the UK home deserves better glass. For too many years the default was chunky uPVC, swollen timber frames, and composite front doors that sag after a decade. We wanted to change the default - to make slim, secure, thermally excellent aluminium doors and windows the first choice for every self-builder, every extension, every full renovation, and every forward-looking developer.
We operate from a dedicated fabrication and distribution base in Birmingham, delivering right across the UK. We supply builders and installers on supply-only terms with trade pricing. We also run an in-house install team for homeowners who want a stress-free start-to-finish job. And we partner with a hand-picked network of builders for full kitchen extensions, side-return builds, two-storey extensions, and conservatory roof replacements - projects where glazing is the hero feature.
Everything we sell is Part L compliant. Every door is PAS 24 secure. Every frame is powder coated for a 25-year life. Every installation carries a 10-year guarantee. Those are the basics and we never compromise on them. Beyond the basics we compete on detail - concealed 3D-adjustable hinges, triple gaskets, flush thresholds, astragal bar bonding, soft-close dampers, ekey fingerprint options on front doors. The fiddly details are where a good door beats a cheap door.
Whether you're replacing a single front door, opening up your home with bifold doors, or planning a full extension, our approach is the same: honest advice, quality products, precise installation and no high-pressure sales tactics. We help homeowners, builders and developers choose glazing that looks better, performs better and is built to last.
Handles, Hinges & Locks
Premium hardware, colour-matched to every frame
Each door and window is finished with market-leading hardware multi-point locking, TS007 3-star anti-snap cylinders, stainless-steel running gear, concealed hinges, and a full range of lever, pull and key-operated handles. Hover any handle to see it enlarge. Mix and match to suit your home or project.
Lever - Anthracite
Smooth ergonomic lever in Anthracite Grey (RAL 7016M) - our most-specified door handle.
Lever - Matt Black
Matt Black lever for contemporary, architectural looks. Pairs with any frame colour.
Lever - White
Bright White lever for classic, clean interiors and traditional homes.
Lever - Polished Chrome
Polished Chrome lever - a timeless shine that suits modern and classic doors alike.
Lever - Satin Silver
Satin Silver lever for a soft brushed finish that hides fingerprints.
Lever - Brushed Gold
Brushed Gold lever for a warm, premium statement. Gorgeous with Anthracite frames.
Quadra - Anthracite
Square-edge contemporary lever in Anthracite Grey - clean architectural lines.
Quadra - Matte Black
Matte Black square-edge lever - the ultimate modern door handle.
Quadra - Matte White
Matte White square-edge lever - fresh, bright, contemporary.
Quadra - Polished Chrome
Polished Chrome square-edge lever for a mirror finish that lifts any door.
Quadra - Satin Silver
Satin Silver square-edge - subtle brushed sheen, easy care.
Quadra - Brushed Gold
Brushed Gold square-edge lever - on-trend warm metal tone.
Window - Anthracite
Espagnolette window handle in Anthracite Grey. Key-lockable option.
Window - Black
Black inline window handle - sleek and timeless. Child-safety key option.
Window - White
White window handle for traditional and modern casements alike.
Window - Polished Chrome
Polished Chrome window handle - a classic finish for any room.
Window - Satin Silver
Satin Silver window handle - a calm, practical, brushed finish.
Window - Brushed Gold
Brushed Gold window handle - a beautiful accent on heritage windows.
Lift & Turn - White
White lift-and-turn handle - simple, strong, classic.
Lift & Turn - Chrome
Chrome lift-and-turn handle - glossy, durable, easy clean.
Lift & Turn - Satin Silver
Satin Silver lift-and-turn handle - brushed finish for a modern look.
Lift & Turn - Brushed Gold
Brushed Gold lift-and-turn handle - a warm luxury statement.
Lift & Turn - Anthracite
Heavy-duty lift-and-turn handle for patio sliders and bifold traffic leaves.
Lift & Turn — Black
Black lift-and-turn handle - gym-grade multi-point gearing.
Lift & Turn — Jet Black
Deep matt black lift-and-turn for sliders and bifold traffic leaves.
Lift & Turn — Brushed Gold
Warm metallic statement handle for premium sliding doors.
Lift & Turn - Satin black
Soft-sheen black that hides fingerprints on busy doors.
Lift & Turn — Anthracite Grey
Colour-matched to RAL 7016 frames for a seamless look.
Rondo keyed handle
Child-safe keyed window handle - ideal for upstairs bedrooms and rentals.
Pull handle suite
Matching pull handle and escutcheon for entrance doors - bold or minimalist.
Concealed 3D hinges
Hidden when closed — adjustable in three planes for a perfect reveal for life.
Multi-point locking
Anti-snap TS007 3-star cylinders, hook bolts and deadlocks on every door as standard.
Anthracite Grey
RAL 7016M
Anthracite Textured
RAL 7016 Matt T
Jet Black Textured
RAL 9005 T
Brushed Silver (Tex)
DB 701 T
Pewter (Textured)
RAL 7037 T
Brushed Aluminium
AY 2050
Any RAL or BS colour available to order — just ask. Dual-colour (different inside / outside) supported on all ranges.
