U-values from 1.2 W/m²K as standard on every product.
Any RAL Colour
Matt, gloss, textured, dual-colour - no surcharge.
UK-Wide Delivery
Birmingham base, nationwide trade and retail delivery.
The Range
Seven product ranges, one expert team
Bifolds, front doors, windows, internal glass, roofs and full extensions — every product Part L compliant, PAS 24 secure and covered by a 10-year guarantee.
Versatali Bifold Doors
Slim aluminium folding doors, huge glass spans, Part L ready. Supply or fit.
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Why choose us
Ten reasons homeowners, builders and architects pick Glazed Window Systems
1
Aluminium only
We have chosen to specialise. We live and breathe aluminium systems, not a catch-all uPVC plus timber plus aluminium shop.
2
Part L as standard
Every product ships Part L compliant. You never have to ask for upgraded glass to pass building control.
3
PAS 24 security
Every external door is independently tested against break-in - insurance-ready on day one.
4
Any RAL colour
Over 200 standard finishes including textured and dual-colour - no surcharge on normal colours.
5
Trade supply-only
Builders and installers get trade pricing, technical packs and a dedicated phone line.
6
Full-fit service
Our in-house installers handle measure, install and aftercare - one guarantee covers everything.
7
Fixed-price quotes
What we quote is what you pay. No end-of-job "extras" invoice.
8
10-year guarantee
Frames, hardware and gaskets covered for a decade, tested to 25+ years of service life.
9
UK-wide delivery
Birmingham base, trade and retail delivery nationwide. WhatsApp, phone or email.
10
Real portfolio
50+ recent builds to show you on the visit. No stock photos, real jobs with real clients.
Residential or Commercial
Homes, developments, offices and public buildings
On the residential side we supply and fit one-off homeowner projects (a front door, a single extension, a set of replacement windows) and full self-build packages with hundreds of m² of glazing. On the commercial side we work with main contractors and specialist subcontractors on apartment blocks, offices, schools, hotels, care homes and retail refurbishments. Aluminium carries the spans, survives the footfall, and gives developers the kerb appeal that shifts units.
If you are a commercial buyer, ask about the commercial account set-up. Extended credit terms, dedicated account manager, full CPD lunch-and-learn for your design team, and engineering calculations on demand. We also offer curtain walling systems and structural glazing for large spans and full glass elevations.
Full glass elevations for modern homes and commercial builds
Curtain walling lets you put a whole wall of glass on a building - floor to ceiling, with no structural brickwork in the elevation. The aluminium carries the load, the glass does the work. We fabricate stick-system and unitised curtain walling to any height, any module size, any glass make-up. Thermally broken, Part L compliant, and designed for decades of service. Perfect for full-height atriums, double-height rear extensions, and commercial entrance lobbies.
Our online visualiser lets you try out different frame colours and finishes against a photo of a real home. Upload a photo of your house and our tool swaps your window and door frames to any RAL colour so you can compare Anthracite Grey against Jet Black, or Heritage Green against Moss Green, on your actual elevation. It takes 30 seconds and it saves hours of second-guessing.
Once you have decided, send the visualisation with your quote enquiry. We will price the exact specification and schedule the survey.
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.
Our process
How a project runs - from first call to final clean
1
Enquiry
Phone, WhatsApp or the quote form. Share photos, plans or just a rough idea of what you need.
2
Site visit
Free no-obligation visit. We measure, look at the detail and show you our portfolio on the iPad.
3
Written quote
Fixed-price quote within 24 hours of the visit. Line-by-line, no hidden extras.
4
Order and pay deposit
Staged payments against milestones. Small deposit, then payments as materials and work are delivered.
5
Manufacture
Your frames are fabricated in the UK. Typical lead time 4 to 6 weeks. Priority service available for urgent jobs.
6
Install and sign-off
Fitting day - our team arrives, installs, tests, adjusts, cleans up and hands over. 10-year guarantee issued.
Customer Reviews
What Our Customers Say
"GWS transformed our kitchen with a 5-metre bifold. Install was tidy, finish is beautiful, and the price was fair. Worth every penny."
Priya D.
Homeowner, Solihull
"Supply-only from GWS is my default. Square frames, pre-gasketed, full technical pack. Makes my job easy."
Matt H.
MH Installations, West Midlands
"The full extension with GWS was a masterclass in project management. Concept to keys in 14 weeks. Flawless."
Emma & Tom D.
Homeowner, Harborne
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.
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.
If you are reading this on the homepage, welcome. Have a click through the range above. Every page has a quick quote form near the top. You can also WhatsApp us on +44 7538 781235 - send a photo of your opening and we can often ballpark a price within an hour.
Ready to transform your home or project?
Quick quote, free site visit, written quote in 24 hours. Home owners and trade both welcome.
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.
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.
Colour Range
Over 200 colours — powder-coated, textured & gloss
Hover over any swatch to see its RAL code. We finish every frame to order — matt, gloss, metallic or textured. Can't see your shade? Any RAL is available.
Anthracite Grey
RAL 7016M
Deep Black
RAL 9005T
HIPCA White
RAL 9910HG
Pastel Green
RAL 6019
Agate Grey
RAL 7038
Jet Black
RAL 9005M
Slate Grey
RAL 7015
Basalt Grey
RAL 7012
Light Grey
RAL 7035
Silver Grey
RAL 7001
Fir Green
RAL 6009
Moss Green
RAL 6005
Chocolate Brown
RAL 8017
Oxide Red
RAL 3009
Sapphire Blue
RAL 5003
Steel Blue
RAL 5011
Cream
RAL 9001
Sand Beige
RAL 1011
Anthracite Textured
RAL 7016 Matt T
Jet Black Textured
RAL 9005 T
Brushed Silver (Tex)
DB 701 T
Pewter (Textured)
RAL 7037 T
Brushed Bronze
DB 703 T
Olive Bronze
DB 604 T
Gold Metallic
AY 1050
Brushed Aluminium
AY 2050
Graphite Pearl
AY 900 M
Any RAL or BS colour available to order — just ask. Dual-colour (different inside / outside) supported on all ranges.
Explore the Range
More ways we transform homes & builds
Versatali Bifold Doors
Slim aluminium folding doors, huge glass spans, Part L ready. Supply or fit.
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Glazed Window Systems
About Us
We specialise in premium glazed doors and windows, combining modern design with lasting durability to enhance residential and commercial spaces across the UK. Crafted with precision and built to perform, our products bring light, style, and value to every project.
