What AluK does

AluK is a UK-based designer, engineer, and distributor of aluminium fenestration systems, operating under Luxembourg-domiciled parent Valfidus Group via AluK (GB) Limited. Its product range spans windows (C70S, 58BW HI series, 77IW/IWE), commercial and residential doors (GT55, 77ID, 58BD HI, Heritage), folding and sliding doors (BSF70, BSC94, IconiK, Luminia F82/SC156, S67, INFINIUM, S140), curtain walling (SL52, SG52) and ground floor treatments (GT55 GFT), with the recent AluFlam range adding certified fire resistance up to EI120. Core technology centres on polyamide thermal-break profiles, foam-insulated centre seals, patented systems (Quik Clip bead, AluK Groove locking), and an integrated UKAS-accredited testing rig at the Chepstow headquarters alongside an in-house Qualicoat-approved powder coating line (~700 m²/hour, 98% powder recovery) producing 4,500 tonnes of aluminium annually with 1,400 tonnes held in UK stock.

The company makes money primarily by selling aluminium profile systems to a network of fabricators (e.g. Alu-tec/Climatec Group, ~1,500 frames/week since 2012) who manufacture finished fenestration products for the construction market; an estimated £190m of installed value flows downstream through this channel each year. It layers in a dedicated commercial sales team engaging specifiers, architects, and developers directly on larger projects, supported by specification tools, NBS Chorus listings, the AluK Academy training centre, and a customer portal. End customers span fabricators, installers, architects/specifiers, property developers, and the education sector, with named flagship projects such as the £24m Torfaen Learning Zone, Escapade Silverstone villas, Chelsea Creek (St George/Berkeley Group), the £60m Chocolate Quarter (St Monica Trust), and a 158,000 sq ft logistics facility at Botany Bay for F1 Real Estate. Recent strategic activity centres on geographic expansion into Ireland (Country Manager appointed 2024) and India (AIS Glasxperts partnership, June 2026), tier extension through the AluFlam fire-rated range (April 2026) and INFINIUM ultra-premium slider, and commercial-team buildout under MD Russell Yates.

Name

AluK

Legal name

AluK SA

Website

https://uk.aluk.com

Company type

Private

Founded year

1949

Operating status

Operating

Headcount range

101–250 employees

Short description

AluK is a UK-based designer and distributor of aluminium window, door, sliding door, and curtain walling systems, supplying a fabricator and installer network across residential, commercial, education, and heritage construction markets.

Ownership category

akta.pro rank

Product category

Aluminium Building Systems

NAICS

Metal Window and Door Manufacturing (332321)

SIC

Metal Doors, Sash, Frames, Moldings & Trim (3442)

akta.pro primary industry

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

akta.pro secondary industries

Aluminum Fabrication & Finishing (Machining, Anodizing, Coating) (IMAKACAI), Aluminum Extrusion (IMAKACAG)

Keywords

• Aluminium window systems
• Aluminium door systems
• Curtain walling systems
• Bi-fold sliding doors
• Ground floor treatments

Headquarters

HQ city

Chepstow

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Aluminium Profile Systems Sales: AluK designs and manufactures aluminium window systems, door systems, folding/sliding doors, curtain walling, and ground floor treatment systems. Revenue is generated through the sale of aluminium profile systems to fabricators who use them to manufacture finished fenestration products. The company sells directly to fabricators through account managers and its customer portal.

Go-to-market motion2 records

Distribution channels4 records

Marketing channels5 records

Core offering

AluK designs, engineers, manufactures, and distributes aluminium profile systems for windows, doors, folding and sliding doors, curtain walling, and ground floor treatments. The company supplies these systems to a network of aluminium fabricators and installers across the UK, supported by in-house UKAS-accredited testing, a vertical powder coating line, and the AluK Academy training centre.

Product overview

AluK is a leading aluminium building systems company offering a comprehensive portfolio of window, door, and curtain walling systems for the UK residential and commercial construction markets. The product range spans multiple tiers including the Optio value brand (58BW, BSF70, BSC94, S67), Luminia premium brand (F82 Plus, SC156), and INFINIUM ultra-premium brand, along with commercial-focused GT55 systems and specialist Heritage heritage-style products. AluK has recently expanded into fire-rated products under the AluFlam brand (A+ windows, AF88 doors, AW50 façades) offering EI60/EI90/EI120 fire resistance. All systems share common elements (gaskets, beads, outer frames, ancillaries) allowing simplified stockholding. The company operates UK manufacturing facilities in Chepstow with in-house testing rigs, powder coating, and the AluK Academy for training. AluK's products serve fabricators, installers, specifiers, and developers across education, commercial, residential, and retail sectors.

Differentiator

Problem solved

Functional benefit

Brands

• Optio: Core residential product range including windows, doors, and sliding systems.
• Luminia
• INFINIUM
• IconiK
• AluFlam
• Quik Clip

Products and services

• C70S Window Standard aluminium casement window engineered to UK standards delivering class-leading performance with U-values of 1.3 W/m²K, advanced water tightness, and configurations including top hung, side hung, tilt & turn and fixed light. For fabricators and installers serving residential and commercial construction.
• 58BW Casement HI Window High-performance aluminium casement window built to UK standards with clean lines and advanced functionality, offering U-values of 1.4 Uw (double glazing) and 1.2 Uw (triple glazing). Part of the Optio range for residential and commercial applications.
• 58BW TBT HI Window Tilt-before-turn aluminium window offering exceptional child safety and seamless operation, with U-values of 1.4 Uw (double glazing) and 1.2 Uw (triple glazing). For residential projects requiring child-safe opening mechanisms.
• 58BW ST HI Steel Replacement Window Steel replacement aluminium window providing the look of steel with aluminium benefits, featuring U-values of 1.5 Uw (double glazing) and 1.2 Uw (triple glazing) and narrow sightlines replicating steel windows. For heritage and contemporary projects.
• 77IW Open-In Window Modern contemporary inward-opening aluminium window with high thermal performance using polyamides, insulated centre seals and foam insertions, achieving U-values of 1.2 Uw (double glazing) and 0.8 Uw (triple glazing). For high-performance residential and commercial applications.
• 77IWE Open-Out Window High-performance outward-opening aluminium window with multi chamber polyamide thermal breaks, insulated centre seals and foam insertions, achieving U-values of 1.2 Uw (double glazing) and 0.8 Uw (triple glazing). Features patented AluK Groove locking system.
• AluFlam A+ EI60 Inward Fire-Rated Window Inward opening fire-rated window with 54mm sightline achieving EI60 fire resistance from both internal and external sides, with turn and tilt functionality for ventilation. Part of the AluFlam fire-rated range for life safety and regulatory compliance projects.
• AluFlam A+ EI60 Outward Fire-Rated Window Outward opening fire-rated window with 54mm sightline achieving EI60 fire resistance, compatible with curtain wall and façade systems, available with manual or automatic opening. For commercial, public buildings, transport hubs, and healthcare facilities.

Quantifiable outcome

• Thermal performance as low as 0.8 Uw with triple glazing on 77IWE windows
• +4 more outcomes

Named customers8 records

Segments6 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Six partnerships are on record, tiered core.

• AIS GlasxpertscoreStrategic or Co-development Partner · 8 June 2026Non-exclusive collaboration announced in June 2026 for AIS Glasxperts to supply AluK aluminium window systems, door systems, and facade systems across India's premium residential market. The partnership combines AIS Glasxperts' in-house manufacturing infrastructure, pan-India execution network, and technical advisory capabilities with AluK's aluminium window systems to deliver integrated solutions to property developers, architects, and individual homebuyers. The agreement excludes joint product development, and clients retain the option to engage directly with AluK. AluK primarily gains access to AIS Glasxperts' execution network and managed customer base in India.
• BM TradacoreTechnology or IntegrationCollaboration with testing, inspection and certification specialists BM Trada, through which the vast majority of AluK products are certified under the Q-Mark scheme. Customers can join Q-Mark for themselves and access the scope of AluK's long-term testing regimes.
• AkzoNobel (Interpon)coreTechnology or IntegrationAluK uses only AkzoNobel Interpon powder coatings, specially designed for the architectural and construction industry and proven in use for 40 years. Interpon powder coatings provide excellent combination of exterior durability and colour/gloss retention.
• QualicoatcoreTechnology or IntegrationAluK's powder coating process is approved by Qualicoat, an international quality label organisation for paint, powder coating and anodising on aluminium. Both pre-treatment and powder coating are tightly controlled to meet specific parameters for weathering ability, UV fading resistance, and temperature/humidity impact.
• GSB InternationalcoreTechnology or IntegrationAluK's powder coating process is also approved by GSB International, which works in conjunction with Qualicoat to ensure consistent quality standards for architectural powder coatings on aluminium.
• Council for Aluminium in Building (CAB)coreStrategic or Co-development PartnerAluK's Managing Director Russell Yates serves as President of the Council for Aluminium in Building (CAB). AluK has also joined CAB's Closed Loop Recycling Scheme, supporting the organisation's mission to embed closed loop recycling at the heart of the aluminium supply chain.

Scale indicators9 records

Recent moves6 records

Expansion highlights7 records

Regional players

• Cortizo: Spanish vertically integrated aluminium systems producer (extrusion through finished window/door/curtain wall systems). Comparable manufacturing depth and product portfolio but primarily Iberian market focus, with growing international expansion.
• Aluprof: Polish aluminium systems brand offering windows, doors, sliding systems and curtain walls to fabricators, with growing UK distribution. Comparable systems and tier-brand approach to AluK but centred on Central/Eastern Europe.

Direct peers

• Technal (Hydro): Hydro-owned aluminium building systems brand supplying windows, doors and curtain walls to fabricators across Europe. Comparable systems catalogue, premium positioning and channel-led distribution model make it a direct comparable to AluK.
• Reynaers Aluminium: Belgian-headquartered aluminium systems company designing and supplying window, door, sliding and curtain wall profile systems to fabricators across Europe — almost identical business model to AluK, including channel-led sales, training academies and sustainability-led positioning.
• Senior Architectural Systems: UK-based aluminium fenestration systems manufacturer offering comparable windows, doors, curtain walls and ground floor treatments to fabricators. Closest UK-native direct competitor to AluK with overlapping product depth and a similar channel-driven go-to-market.
• Origin (Global Windows): UK-focused manufacturer of premium aluminium windows and doors (bi-folds, sliding, residential) selling through installer and fabricator partners. Highly comparable to AluK's Luminia/INFINIUM premium tiers and competing head-to-head on UK residential specifications.

Broad incumbents

• Sapa (Hydro Building Systems): Hydro's secondary aluminium systems brand alongside Technal, covering windows, doors and façades across Northern Europe. Broad incumbent in the same aluminium fenestration category with overlapping channel-driven distribution into UK commercial projects.
• Kawneer (Alcoa/Arconic): Established global aluminium architectural products brand with deep UK/EU presence in curtain walls, windows and entrances. Overlaps with AluK's commercial and façade ranges but with a heavier tilt toward large commercial projects and global accounts.
• Schüco: German global leader in aluminium (and steel/PVC-U) window, door and façade systems with a much larger portfolio and geographic reach. Overlaps with AluK across windows, sliding doors and curtain walls but operates at meaningfully larger scale and broader scope.

Emerging players

• Aluminium Architectural Systems (AAS): Smaller UK aluminium systems supplier providing window, door and curtain wall profile systems to fabricators. Operates in the same channel ecosystem as AluK with overlapping customer profiles (UK fabricators, installers, specifiers) but at narrower scale and product depth.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/AluK_GB
• Facebookfacebook.com/Aluk.GB.Ltd
• LinkedInlinkedin.com/company/aluk-gb-ltd

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles14 records

Subsidiaries1 record

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 AluK