Modern aluminium bifold doors on a contemporary building
Trade & Private Supply

Premium Aluminium Windows & Doors

AJO Windows and Doors supplies high-performance aluminium windows, doors and glazing systems to trade professionals and private homeowners alike. From bifold doors to commercial shopfronts — quality you can rely on, delivered when you need it.

Supplying high-performance aluminium windows and doors for homeowners, developers, architects, and trade professionals across the UK.

Commercial Projects
New Build
Residential
Refurbishment
UK
Trade & Private
CAD
Bespoke Design Drawings
8–10
Weeks Delivery Time
100%
Customer Satisfaction
Aluminium window frame glazing detail close up

Engineering & performance

Technical Specifications

T5 powder coat · Thermal value 1.2 W/m²K · High-end ironmongery as standard · Double & triple glazing available

Thermal Performance

Double Glazed Unit

Advanced thermal design for energy efficiency, comfort and year-round performance.

THERMAL ANALYSIS

26.817.88.8-0.3-9.3-18.3°C
◄ EXTERIORINTERIOR ►28mm IGU
T5 Powder Coat
Aluminium Extrusion
Polyamide Thermal Break
Toughened Glass
Warm-edge Spacer Bar

THERMAL ANALYSIS

U-VALUE1.2 W/m²·K
GLASS MAKE-UP6mm Low-E / 14 / 6mm Low-E
GAS FILLArgon 90%
POWDER COATT5 – any RAL
IRONMONGERYHigh-end as standard

Thermal Performance

Triple Glazed Unit

Maximum thermal insulation for superior comfort and outstanding energy savings.

THERMAL ANALYSIS

26.817.88.8-0.3-9.3-18.3°C
◄ EXTERIORINTERIOR ►44mm TGU
T5 Powder Coat
Aluminium Extrusion
Polyamide Thermal Break
Toughened Glass
Warm-edge Spacer Bar

THERMAL ANALYSIS

U-VALUE0.7 W/m²·K
GLASS MAKE-UP4 / 16 / 4 / 16 / 4 mm
GAS FILLArgon – both cavities
POWDER COATT5 – any RAL
IRONMONGERYHigh-end as standard
AJO

Windows & Doors

About us

Trusted aluminium glazing supplier to trade and private clients across London & the South East

AJO Windows and Doors was founded with one goal: to be the supplier that professionals and homeowners can genuinely rely on. We source and supply premium aluminium products for commercial, new build, residential and refurbishment projects across the UK — from slim-sightline bifold doors and sliding patio systems to roof lanterns, flat rooflights and commercial shopfronts. Whether you're a builder, architect, installer or a private homeowner, every product we supply is built to perform, backed by real technical knowledge and delivered with the service your project deserves.

CommercialNew BuildResidentialRefurbishment

Ready to discuss your next project?

Whether you're pricing a new build, planning a renovation or specifying a commercial fit-out, our team is ready to help.

Common questions

Frequently asked questions

What areas do you supply aluminium windows and doors to?

We supply across London, Essex, Hertfordshire, Kent, Surrey and the wider South East of England. Whether you are a homeowner, architect, developer or main contractor, we can deliver bespoke aluminium glazing systems to your site.

Do you supply both double and triple glazing?

Yes. All our aluminium window and door systems are available with argon-filled double glazed units (DGU) achieving U-values of 1.2 W/m²K, or triple glazed units (TGU) achieving U-values as low as 0.7 W/m²K for maximum thermal performance.

Can I specify any RAL colour?

Absolutely. Every system in our range is finished in T5 powder coat and is available in any RAL colour — satin, gloss or matt finish. Standard colours include black, white, grey and anthracite, but we can match virtually any shade.

What is the lead time for bespoke aluminium windows and doors?

Our standard lead time is 8–10 weeks from order confirmation. All products are bespoke to your exact dimensions and specification, and we provide CAD design drawings before manufacture.

Do you supply to the trade as well as private homeowners?

Yes — we supply to both trade professionals (architects, builders, developers, main contractors) and private homeowners. We are experienced in both residential and commercial glazing projects of all scales.

Are your aluminium systems CE marked?

Yes. All our aluminium window and door systems are CE marked to EN 14351-1, confirming compliance with European performance standards for weather resistance, structural integrity and safety.

Contact us

Speak directly with our team