What Sunflex UK does

Sunflex UK is a Norwich-headquartered manufacturer of premium aluminium glazing systems, established around 1999-2000 and operating under the registered name Sunflex UK (Companies House registration 03989844). The company designs and produces bifold doors (SF55, SF55i, SF75), sliding doors (SVG20 with 20mm sightlines, SVG30 with 30mm sightlines, SVG83, SF80 high-performance, corner and pocket variants), heritage Art Deco-inspired doors, front doors, aluminium windows (SEF and SAL series), internal glass partitions, glass roofs (lean-to, lanterns, flat rooflights, patio terrace roofs), and commercial doors. Technical differentiation centres on ultra-slim sightlines (20mm-115mm depending on product line), 44mm multi-chambered thermal breaks, 900Pa water tightness, 600Pa air permeability, 2,600Pa wind load resistance, DDA-compliant low-threshold flush tracks, and unique open-corner configurations integrating bifold windows into corner bifold door systems. The company holds PAS24 security accreditation, Made in Britain certification, and Build It Awards recognition, and has been featured on Channel 4 Grand Designs and cited in RIBA award-winning projects.

The business operates exclusively through a B2B2C distribution model, selling only to a nationwide network of accredited glazing trade distributors rather than directly to end customers. Distributors receive installation training, detailed technical advice, and in-house product design support from Sunflex UK, and handle measurement, installation, and after-sales service for end customers. Prospective buyers use a postcode-based locator on the Sunflex UK website to identify their nearest authorised distributor. Revenue is generated through one-time bespoke product sales with no disclosed subscription or recurring component; pricing is handled privately through the distributor network with no public consumer pricing. An online trade portal (online.sunflexuk.co.uk) supports order management for trade customers.

Customer segments span residential homeowners (primary, served indirectly), commercial properties, glazing trade distributors (direct B2B customers), and architects and specifiers. The product portfolio includes over 40 SKUs. Beyond residential glazing, Sunflex UK has expanded into marine applications through an OEM partnership with Haines Marine (SF35 sliding turn doors on 32 Sedan and 32 Offshore boat models) and into modular garden buildings through a partnership with Modulr Space Ltd. The company is privately held with no disclosed external investment, ownership structure, or institutional investors in the source material.

Name

Sunflex UK

Legal name

Sunflex UK

Website

https://sunflexuk.co.uk

Company type

Private

Founded year

1999

Operating status

Operating

Headcount range

101–250 employees

Short description

Sunflex UK manufactures premium aluminium glazing systems — bifold doors, sliding doors, heritage doors, windows, glass roofs, and partitions — selling exclusively through a nationwide network of accredited UK trade distributors serving residential, commercial, marine, and modular building customers.

Ownership category

akta.pro rank

Headquarters

HQ city

Norwich

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, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. Aluminium Door and Window Systems Sales: Sunflex UK manufactures and sells aluminium bifold doors, sliding doors, heritage doors, front doors, windows, glass roofs, and commercial glazing products exclusively through a network of UK distributors. End customers purchase and install through accredited distributors who handle measurement, installation, and after-sales service.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

Sunflex UK manufactures bespoke aluminium glazing systems including bifold doors, sliding doors, heritage doors, front doors, aluminium windows, glass roofs, internal glass partitions, and commercial doors. All products are custom-made to individual project requirements with proprietary ultra-slim sightlines, multi-chambered thermal breaks, PAS24 security accreditation, and DDA-compliant flush thresholds. The company supplies exclusively to accredited glazing trade distributors across the UK rather than selling directly to end customers.

Product overview

SUNFLEX UK is a manufacturer of award-winning aluminium glazing systems, offering bifold doors and sliding doors as the core product lines, supplemented by heritage doors, front doors, aluminium windows, glass roofs, internal glass partitions, and commercial doors. The product portfolio includes multiple door series: the SF55/SF55i and SF75 bifold doors for residential applications, the SVG20/SVG30/SVG83 ultra-slim sliding doors featuring sightlines from 20mm, the SF35 sliding turn doors for marine use, and heritage Art Deco-inspired doors. Glass roof products encompass lean-to roofs, lanterns, flat rooflights, and patio terrace roofs. All products are custom-made to individual project requirements with a range of designs, configurations, colours, hardware and finishing options. The company operates through a network of accredited distributors across the UK who receive installation training and technical support from SUNFLEX UK.

Differentiator

Problem solved

Functional benefit

Products and services

• SF55 Aluminium Bifold Doors

Quantifiable outcome

• 900Pa water tightness, 600Pa air permeability, 2,600Pa wind load resistance on SF75 systems
• +2 more outcomes

Named customers6 records

Segments4 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

Eleven partnerships are on record, tiered core and minor.

• HBD SystemscoreChannel Partner/ Reseller/ DistributorHBD Systems is a SUNFLEX UK Platinum distributor with over 25 years experience and 100+ years combined team experience. Serving South East England including London, St Albans, Hemel Hempstead, Stevenage, Oxford, and Watford. Established as G&N Windows, then Herts Bifold Doors, now HBD Systems - a family owned business founded by Graham and Neil who started as installers and grew to joint managing directors.
• P&P GlasscoreChannel Partner/ Reseller/ DistributorP&P Glass has supplied and installed thousands of SUNFLEX projects since 1981 across South and West London, Surrey, Hampshire, Berkshire, and West Sussex. Gold distributor with three high quality showrooms in Guildford, Esher, and Battersea. All staff are fully trained and directly employed with no subcontracting. Operates a funded apprentice and training scheme with minimum two-year NVQ certification.
• Mitchell GlasscoreChannel Partner/ Reseller/ DistributorGalashiels-based distributor with fifteen years experience installing SUNFLEX UK products. Specialises in projects requiring compliance with stringent Scottish Building Regulations. Long-established and highly regarded distributor capable of optimising product configurations for performance and aesthetic appeal.
• Folding FuturecoreChannel Partner/ Reseller/ DistributorNational SUNFLEX UK distributor specialising in innovative bifold door installations. Installed SF55 aluminium bifold doors for award-winning RIBA London and Retrofit award-winning project.
• YES Glazing SolutionscoreChannel Partner/ Reseller/ DistributorExperienced SUNFLEX distributor based in Westerham, Kent. Specialises in unique design solutions including Georgian-style bifold doors with decorative glazing bars to match traditional aesthetics.
• AluxicoreChannel Partner/ Reseller/ DistributorSUNFLEX UK distributor serving the Peak District and Derbyshire area. Specialises in contemporary extensions on traditional properties with large sliding door installations.
• Ultimate Glazing SolutionsminorChannel Partner/ Reseller/ DistributorSUNFLEX UK distributor and one of the first to complete installation of the new SVG30 slim framed sliding door system.
• Panoramic WindowsminorChannel Partner/ Reseller/ DistributorSUNFLEX UK distributor near Bristol, serving the Gloucestershire area with open corner sliding door installations.
• L+L InstallationsminorChannel Partner/ Reseller/ DistributorGlazing distributor for Gloucestershire new-build projects including the Latitude37 home featuring six sets of SVG30 sliding doors.
• Modulr Space LtdminorStrategic or Co-development PartnerPartnership for garden rooms and home offices. Modulr Spaces incorporates SUNFLEX SF55i bifold doors and ultra-slim SVG30 sliding door systems into their architecturally-designed modular garden buildings. Founded by FDArchitecture Ltd to satisfy COVID-19 driven demand for high quality garden work or leisure spaces.
• Haines MarinecoreOEM/ Whitelabel/ Licensing PartnerLong-standing partnership with Norfolk boatbuilder. Haines Marine selected SUNFLEX SF35 sliding turn doors for their 32 Sedan and 32 Offshore models. One of the most respected boatbuilding companies in the UK and Europe, building boats since 1980. Located in Catfield on the Norfolk Broads, just 15 miles from SUNFLEX UK Head Office.

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Smart Systems (Smart Aluminium): Major UK aluminium systems house offering bifold, sliding, entrance, and window systems via fabricator/installer channels, serving the same UK residential and commercial glazing market as Sunflex UK.
• Kloeber UK: UK-based manufacturer of bespoke aluminium bifold, sliding, and front door systems positioned in the high-end residential and architect-specified segment, directly comparable in product and channel.
• IDSystems: UK-based manufacturer of aluminium sliding doors, bifold doors, and frameless glass systems serving residential and commercial customers through a similar trade-distributor model in the United Kingdom.
• Origin Global: UK specialist manufacturer of aluminium bifold and sliding doors with a nationwide installer network, directly overlapping with Sunflex UK's core bifold and sliding product lines and trade-led GTM.

Emerging players

• Crittall Windows: UK heritage steel-and-aluminium window and door manufacturer with strong brand recognition in listed-building and high-end residential renovation — directly overlapping with Sunflex's heritage door range and architect-led specification demand.

Broad incumbents

• Schüco: Global German-headquartered aluminium systems manufacturer with a broad portfolio spanning windows, sliding doors, façades, and security systems, overlapping with Sunflex across architectural aluminium glazing.
• Reynaers Aluminium: Large European aluminium systems provider covering windows, sliding doors, curtain wall, and entrance solutions across residential and commercial segments, competing with Sunflex UK in the premium sliding door category.
• Technal: Architectural aluminium systems brand (part of Hydro) producing windows, sliding doors, and curtain walling for residential and commercial projects across the UK and Europe, comparable on materials and built-environment channels.
• Aluk: UK-focused aluminium building systems supplier offering windows, sliding doors, and entrance doors through a fabricator and installer network, broadly competing in the same UK glazing channels.
• Comar Architectural Aluminium: UK aluminium systems manufacturer with commercial and residential product lines including curtain wall, windows, and doors, comparable in materials, channel, and target built-environment segments.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/sunflexuk

Compliance3 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 Sunflex UK