JUST Aluminium

What JUST Aluminium does

JUST Aluminium Limited is a privately held UK manufacturer of premium aluminium doors and windows operating on a supply-only basis from a single facility in Morley, near Leeds, Yorkshire. The company fabricates bifolding doors, sliding patio doors, aluminium windows, French doors, entrance doors, roof lights and lanterns, and interior glazed screens using imported profile systems from Alunet, Cortizo, Smart Systems, and Reynaers, with proprietary branded ranges JA-48 (48.5mm ultra-slim bifold) and JA-25 (25mm interlock sliding door) forming the marquee SKUs. Products carry PAS 24 security accreditation across most lines, with Secured by Design, British Standard Kitemark, and Qualicoat marine-grade powder coating on selected ranges.

The business model is direct-to-customer via a website-based instant quote configurator and 0800 phone line, with a trade partner programme for builders, developers, architects, and existing UPVC/timber fabricators. Pricing is per-panel/unit (e.g., JA-48 bifolds from £445/panel, JA-25 and Cortizo 4700 sliders from £650/panel) and includes UK mainland delivery; installation is not provided but bridged through a network of recommended FENSA-registered installers. Stock colours and roof stock sizes support 2-week and 7-10 working-day lead times respectively.

The company targets two primary segments (homeowners undertaking renovations/extensions and trade professionals needing reliable aluminium supply) with a secondary commercial segment (bars, cafés, restaurants). It is a bootstrapped micro-operator with 1-10 employees, no disclosed funding rounds, no M&A activity, and no public revenue reporting, generating one-time licence-style revenue on each unit sale across the UK mainland only.

Name

JUST Aluminium

Legal name

JUST Aluminium Limited

Website

https://justaluminium.com

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

JUST Aluminium is a UK-based, supply-only manufacturer of premium aluminium bifolding doors, sliding doors, windows, and roof systems, selling directly to homeowners and trade professionals across the UK mainland via an online configurator and phone sales.

Ownership category

akta.pro rank

Product category

Aluminium fenestration products

NAICS

Metal Window and Door Manufacturing (332321), Ornamental and Architectural Metal Work Manufacturing (332323)

SIC

Metal Doors, Sash, Frames, Moldings & Trim (3442), Sheet Metal Work (3444)

akta.pro primary industry

Aluminum Value-Added Components (Automotive, Aerospace, Packaging, Building Systems) (IMAKACAM)

Keywords

• Aluminium bifold doors
• Aluminium sliding doors
• Aluminium windows
• Aluminium roof lanterns
• Aluminium entrance doors

Headquarters

HQ city

Morley, England

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Marketing or Sales, Infrastructure, Technology or R&D

Revenue model

1. Aluminium Bifold Door Sales: One-time purchase of aluminium bifolding doors, priced per panel. Includes supply only - no installation. JA48 from £445 per panel, Cortizo from £495 per leaf. UK delivery included in pricing.
2. Aluminium Sliding Door Sales: One-time purchase of aluminium sliding patio doors. JA25 and Cortizo 4700 priced from £650 per panel (unglazed, inc UK delivery, inc cills). LowE glass available from £63psm.
3. Aluminium Window Sales: Supply only aluminium windows including Alitherm 300, Alunet ALUNA, Heritage 47, sliding sash, fixed frame and bifolding windows. Priced per specification.
4. Roof System Sales: Supply only roof lights and roof lanterns. Stock sizes available with 7-10 working day lead times. Custom sizes also available.
5. Entrance Door Sales: Supply only aluminium entrance doors including DA90N (quadruple glazed, Ud=0.66 w/m2K) and DA77N (triple glazed, Ud=0.8 w/m2K) models.
6. Internal Glass System Sales: Interior glazed doors and wall systems including hinged, pivot, and sliding glass door options with aluminium frames.
7. Integral Blind Sales: Magnetically operated integral blinds sealed within double-glazed glass units. Available in various colours including Black, White, Anthracite Grey, Cream, Rose Gold, Brown, Dark Brown, and Metallic Silver.

Pricing tiers

Go-to-market motion1 record

Distribution channels5 records

Marketing channels6 records

Core offering

JUST Aluminium is a UK-based fabricator and direct supplier (supply-only) of premium aluminium glazing products, including bifolding doors, sliding patio doors, aluminium casement and flush windows, French doors, Heritage doors, entrance doors and aluminium roof lanterns/roof lights. The company manufactures finished units using profile systems sourced from Smarts, Origin, Schüco and Cortizo, then sells them factory-direct to homeowners and trade professionals across UK mainland, supported by an online configurator, a Trade Partner Programme and a network of recommended installers.

Product overview

JUST Aluminium is a UK-based manufacturer and supplier of premium aluminium doors and windows operating on a supply-only basis. The product portfolio centers on three core categories: bifolding doors (JA-48, Cortizo, Smart Visofold 1000), sliding patio doors (JA-25 Ultra Slim, Cortizo 4700, Smart Visoglide Plus, Reynaers CP130), and aluminium windows (Alitherm 300, Alitherm Heritage 47, Alunet ACW81 ALUNA, Sliding Sash, Fixed, Bifolding). Supporting products include French doors, aluminium entrance doors, roof systems (lights and lanterns), and interior glass partitions. The company also offers integral blinds as an add-on for bifolding doors. Products are primarily supply-only with recommended local installer networks, serving both trade professionals and homeowners throughout UK mainland.

Differentiator

Problem solved

Functional benefit

Brands

• JA-48: The company's proprietary bifold door system developed based on the Alunet slimline system, offering 48.5mm frame width and ultra-slim 107mm sightline.
• JA-25

Products and services

• Aluminium bifold doors Factory-fabricated aluminium bifolding doors with thermally broken polyamide profiles, multi-chamber construction, low-E double or triple glazing and secure multipoint locking; supplied direct to homeowners and trade professionals across UK mainland, configurable online by size, colour and hardware.
• Aluminium sliding patio doors Large-format aluminium sliding patio doors using thermally broken aluminium profile systems, designed for residential extensions and new-build projects; supplied direct from the factory with online configuration of size, colour, glazing and hardware.
• Aluminium windows (casement and flush) Aluminium casement and flush windows fabricated from Smarts, Origin, Schüco or Cortizo profile systems, with thermally broken profiles, multi-chamber construction, low-E glazing and secure locking; intended for residential and light-commercial projects and supplied direct across UK mainland.
• Aluminium Heritage and French doors Aluminium Heritage doors and aluminium French doors styled for traditional and period properties, combining classic aesthetics with modern thermally broken aluminium construction; supplied direct to homeowners and trade customers.
• Aluminium entrance doors Aluminium entrance/front doors fabricated in thermally broken aluminium profiles, supplied as a supply-only direct-sale product to homeowners and trade customers across UK mainland, configurable online.
• Aluminium roof lanterns and roof lights Aluminium roof lanterns and flat roof lights fabricated for residential extensions and orangeries, supplied direct via online configuration with options for size, glass specification and frame colour.
• Trade Partner Programme Structured trade account offering for UK fabricators, installers, builders and other trade buyers, providing trade pricing, a dedicated account manager, marketing and lead-referral support, and access to the company's full range of fabricated aluminium products.
• Recommended Installers network referral Curated referral service connecting supply-only homeowner customers with vetted local installers for fitting of the company's aluminium glazing products.

Quantifiable outcome

• U-values as low as 1.4 W/m²K with double glazing, reducing energy bills
• +6 more outcomes

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Nine partnerships are on record, tiered core and secondary.

• Alunet SystemscoreTechnology or IntegrationAlunet is the UK's fastest growing system supplier of bifolding and sliding doors. Their ultra-slim Bifold Door System is incorporated into JUST Aluminium's proprietary JA48 bifold door. Alunet systems are recognised for quality, slim profiles, energy efficiency and sustainability. JUST Aluminium fabricates their bifold systems using Alunet profiles.
• CortizocoreTechnology or IntegrationCortizo is a leading manufacturer of aluminium profiles for doors and windows. JUST Aluminium uses Cortizo profiles for their bifolding doors (Cortizo bifold) and sliding patio doors (Cortizo 4700). Cortizo products are known for slim sightlines, durability, and thermal efficiency. Products are tested to stringent standards before release.
• Smart Systems (Visofold 1000)coreTechnology or IntegrationSmart Systems is a leading UK systems company for aluminium windows and doors. Their Visofold 1000 bifold system is available from JUST Aluminium at trade prices. The system features polyamide thermal break, EPDM gaskets, and multi-point locks meeting Building Regulations Document L 2010.
• ReynaerssecondaryTechnology or IntegrationReynaers is a premium aluminium systems company. JUST Aluminium supplies the Reynaers CP130 sliding patio door - a premium lift & slide solution balancing price, performance and design. Features include Uf 1.9 W/m²K thermal insulation and PAS 24 accreditation.
• Smart Systems (Visoglide Plus)secondaryTechnology or IntegrationSmart Visoglide Plus sliding door system offered by JUST Aluminium. Features extended polyamide thermal break achieving U Value of 1.6 W/m²K. British Standard Kitemarked system achieving KM 530838 PAS 24:2012. Suitable for large apertures with stunning unimpeded views.
• Alitherm (Smart Systems)secondaryTechnology or IntegrationAlitherm 300 casement windows from Smart Systems offered by JUST Aluminium. Features polyamide thermal break technology, achieves maximum U Value of 1.6, and earns A rating on Window Energy Rating with U value as low as 1.5W/m²K.
• Alunet (ACW81 ALUNA Window)secondaryTechnology or IntegrationAlunet ACW81 ALUNA window system with ultra-slim sash offering minimal sightline for maximised views. PAS24:2022 certified, exceeds Part L compliance with WER rating of A. 73mm profile seamlessly matches JA48 bifold system.
• Alitherm Heritage 47secondaryTechnology or IntegrationAlitherm Heritage 47 range engineered specifically to replace existing steel and Crittall windows. Ideal for heritage applications, listed building renovations and projects where planning constraints apply. U values as low as 1.5W/m²K.
• BCB UK (Integral Blinds)secondaryTechnology or IntegrationBCB UK Notan Magnetic integral blinds for bifolding doors and sliding doors. Blinds are sealed within double-glazed glass units, maintenance-free with 10 year guarantee. Magnetically operated with smooth gliding movement. Tested on 10,000 repetitive cycles.

Scale indicators3 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• Express Bi-folding Doors: UK-based supply-only aluminium bifolding door specialist serving both homeowners and trade. Directly competes on online configurator pricing, fast lead times, and slimline aluminium systems from comparable European profile brands.
• AluFold Direct: UK supply-only aluminium bifold and sliding door manufacturer operating on a similar direct-to-customer, online-configurator model. Comparable product breadth (bifolds, sliders, windows, entrance doors) and trade partner programme makes it the closest head-to-head competitor to JUST Aluminium.
• Origin (Origin Global):

Market position

Strengths4 records

Weaknesses1 record

Competitive moat4 records

Key risks2 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/justaluminiumltd
• Instagraminstagram.com/justaluminium
• LinkedInlinkedin.com/company/just-aluminium

Compliance15 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about JUST Aluminium