What Clark Door does

Clark Door is a UK-headquartered specialist industrial door designer, manufacturer, installer, and service provider, founded in 1873 and based at its Cumbria factory in Carlisle. The company designs, engineers, and manufactures entirely in-house a portfolio of high-performance doors spanning five core categories: acoustic doors (up to Rw 70dB/STC 70 attenuation and up to 120 minutes fire resistance), fire-rated doors (sliding, pivot, and hinged variants rated up to 4 hours, certified to BS 476 Part 22, EN 1634-1, NFPA 252, and UL 10C), cold store doors (including the patented Clark Coldmaster horizontal air curtain achieving up to 70% energy savings in air infiltration through open doorways, plus high-speed chiller variants), industrial roller shutters and sectional overhead doors, and high-specification security roller shutters (Clark Multigard SR3/SR4/SR5 certified to BRE LPS 1175 issue 8 with Secured by Design endorsement). Distinctive technical capabilities include EMI/RFI shielding for substations and EMC chambers, hurricane/blast/ballistic/radiation-resistance options, custom door dimensions up to 20m x 20m, and the largest single door ever manufactured at 16m x 11m and 35 tonnes. The company also holds the LPCB LPS 1271 fire door installation accreditation for over 20 years and BS EN ISO 9001:2015.

Revenue is generated through three streams: (1) project-based custom door manufacturing and installation as the primary one-time spec-and-build revenue, (2) recurring revenue from nationwide planned preventative maintenance (PPM) contracts and emergency call-out repair services, and (3) OEM spare parts supply (5,000+ parts stocked, with legacy parts manufactured to original specifications). Go-to-market is direct enterprise field sales - expert applications engineers visit client sites to develop bespoke specifications, working in close coordination with architects, consultants, and construction contractors from early design stages. The distribution channel is global, exporting to 50+ countries, with regional sales support via a MENA office in Dubai (Block B, Business Village, Port Saeed). Marketing uses website content, LinkedIn and Instagram organic social, Mailchimp email newsletter, trade shows, CPD presentations, and press releases; a specific carve-out excludes the US market from cold storage spare parts supply.

The customer base is deep and diversified across enterprise verticals: performing arts (Royal Opera House), film and TV studios (Warner Bros, BBC, Pinewood Studios, Shinfield Studios, NFL Media, ITV, Sky), cold store and distribution (Unilever, Procter & Gamble, Red Bull), infrastructure and security (London Underground, Royal Air Force), advanced manufacturing (Rolls Royce, Siemens, IBM, Ford), and architectural projects (Foster + Partners). The company is privately held as Clark Door Limited (registered in Scotland, registration SC046648) with no disclosed parent, private equity backing, or venture capital investment, and no public revenue or headcount disclosure.

Name

Clark Door

Legal name

Clark Door Limited

Website

https://clarkdoor.com

Company type

Private

Founded year

1873

Operating status

Operating

Headcount range

51–100 employees

Short description

Clark Door is a UK-based designer, manufacturer, installer, and service provider of specialist high-performance industrial doors (acoustic, fire-rated, cold storage, industrial, and security-rated) serving enterprise customers across film/TV studios, performing arts venues, cold storage facilities, and infrastructure projects in 50+ countries.

Ownership category

akta.pro rank

Product category

Industrial Door Manufacturing

NAICS

Metal Window and Door Manufacturing (332321)

SIC

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

akta.pro primary industry

Commercial & Industrial Doors (Sectional, High-Speed, Fire, Security) (IMADAIAF)

akta.pro secondary industry

Garage Doors & Rolling Shutters (IMADAIAE)

Keywords

• Industrial door manufacturing
• Acoustic door systems
• Fire-rated doors
• Cold storage doors
• Security roller shutters

Headquarters

HQ city

Carlisle

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Door Manufacturing and Installation: Project-based custom door manufacturing, installation, and commissioning for specialist applications. Doors are designed, engineered and manufactured to customer specifications for large-scale projects.
2. Service and Maintenance: Nationwide planned preventative maintenance (PPM) contracts and emergency call-out repair services. Service engineers provide fast response with over 5,000 parts stock.
3. Spare Parts Supply: Supply of spare parts for Clark Door products, with most parts available off the shelf. Parts for older doors manufactured to original design specifications.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

Clark Door designs, engineers, manufactures, installs, and services high-performance specialist door systems including acoustic, fire-rated, cold storage, industrial, and security-rated doors. All products are custom-manufactured to customer specifications entirely in-house at the company's headquarters and factory in Cumbria, United Kingdom, with patented technologies such as the Clark Coldmaster horizontal air curtain and Clark Multigard auto self-locking mechanism. The company serves global clients across film studios, theatres, cold store warehouses, defence facilities, and other demanding applications across more than 50 countries.

Product overview

Clark Door is a market leader in special purpose door systems, offering an integrated portfolio of high-performance doors designed, engineered, and manufactured in-house in Cumbria, UK. The product range spans five core categories: Acoustic Doors (horizontal/vertical sliding, hinged, and oversized configurations up to Rw 70dB), Fire Doors (sliding, pivot, and hinged designs rated up to 4 hours), Cold Storage Doors (including the patented Clark Coldmaster with up to 70% energy savings, plus high-speed chiller doors), Industrial Doors (roller shutters and sectional overhead), and Clark Multigard security-rated roller shutters (SR3-SR5). Key branded products include Clark Coldmaster (freezer doors), Clark Multigard (security shutters), and Clark Steelman (steel hinged acoustic doors). The doors serve demanding applications across film studios, music venues, theatres, cold store warehouses, and security-sensitive facilities, with capabilities including fire resistance, acoustic attenuation, temperature control, and security ratings. The company also provides installation and maintenance services.

Differentiator

Problem solved

Functional benefit

Brands

• Clark Coldmaster®: High-speed freezer and cold storage door featuring patented horizontal air curtain technology for energy savings up to 70%, suitable for temperatures from ambient to -30°C.
• Clark Multigard®
• Clark Steelman®

Products and services

• Acoustic Doors (Horizontal Sliding) High-performance horizontal sliding acoustic doors for soundproofing large openings in film studios, music venues, theatres, and industrial applications. Available up to Rw 58dB on a single door and Rw 75dB on combination doors, with optional fire ratings up to 120 minutes.
• Acoustic Doors (Vertical Sliding) Counterweighted vertical sliding acoustic doors for applications with limited lateral space, featuring smooth, quiet operation with controlled acceleration/deceleration. Available up to Rw 58dB with optional 2-hour fire rating.
• Oversized Swing/Hinged Acoustic Doors Large-format hinged acoustic doors providing high attenuation sound reduction up to Rw 53dB for double-leaf configurations. Designed for applications requiring oversized door solutions with fire and thermal insulation options.
• Clark Steelman Steel Hinged Swing Acoustic Doors Steel hinged doors offering acoustic, security, and fire-rated properties with mechanically robust construction. Available with soundproofing up to Rw 57dB, fire ratings, and optional EMI/RFI shielding for electrical substations and EMC chambers.
• Cable Entry Acoustic Doors (TV/Film) Specialized acoustic doors designed for TV and film studios with cable entry systems to allow equipment cables to pass through while maintaining sound isolation.
• Fire Doors (Steel Hinged) Acoustic steel hinged fire doors with ratings up to 4 hours (BS 476 Part 22), offering sound isolation up to Rw 57dB. Compliant with DDA/ADA accessibility guidelines.
• Fire Doors (Pivot) Pivot fire doors with 90-degree panel operation in single or double leaf arrangements. Fire ratings up to 60 minutes to BS EN 1634-1, with hinge-free design for a clean flush appearance.
• Fire Doors (Oversized Hinged) Oversized composite hinged fire doors with sound reduction up to Rw 56dB, fire ratings up to 2 hours (BS EN 1634-1 / UL 10C), and optional EMI/RFI shielding. Includes pedestrian pass doors within the main door leaf.
• Fire Doors (Sliding) Large-format sliding fire doors in horizontal, vertical, and telescopic configurations. Available up to 20m wide by 20m high, accredited to BS 476 Part 22, EN1634-1, NFPA252, and UL10C standards.
• Clark Coldmaster High Speed Freezer Doors Energy-saving cold storage doors with patented horizontal air curtain technology achieving up to 70% energy savings in air infiltration. Designed for fork truck traffic in freezer distribution centres, operating in temperatures from ambient to -30 degrees C.
• High Speed Chiller Doors (Rapide/Swiftsafe) High-speed roll doors (Rapide for external, Swiftsafe for internal) featuring counterbalance systems with AC inverter drive technology, speeds up to 1.8 m/sec, and twin ply woven polyester curtain fabric. Operates in temperatures from ambient to 5 degrees C.
• Cold Store Doors (Vertical Sliding) 100% weight counterbalanced vertical sliding cold store doors for minimal side-room applications. Available in manually or electrically powered versions with controlled open/close speeds and BMS integration capability.
• Cold Store Doors (Horizontal Sliding) Heavy-duty horizontal sliding cold store doors for freezer and chill applications. Features bi-parting designs that open at twice the speed of single leaf doors, suitable for temperatures from ambient to -30 degrees C.
• Cold Store Doors (Hinged) Hinged cold store doors with internal reinforced panel frame and foamed-in-place urethane construction for uniform insulation. Finished in white food safe PVC with mould resistance, suitable for temperatures from ambient to -30 degrees C.
• Clark Multigard Security Roller Shutter High-specification security roller shutter doors rated SR3, SR4, and SR5, certified by BRE to LPS 1175 issue 8 and endorsed by Secured by Design. Available up to 8m wide x 10m high with applications including hurricane, blast, ballistic, and radiation resistance.
• Industrial Roller Shutter and Sectional Overhead Doors Industrial roller shutter and sectional overhead doors designed for contract applications with long life solutions, available with thermal insulation, sound proofing, and fire properties.
• Industrial High Speed and Steel Hinged Doors High-speed industrial doors combined with steel hinged options for demanding industrial environments requiring rapid access and robust security.
• Service and Maintenance Contracts Nationwide planned preventative maintenance (PPM) contracts and emergency call-out repair services for installed Clark Door products. Service engineers provide fast response with over 5,000 parts stock, including manufacture of spare parts for older doors to original design specifications.

Quantifiable outcome

• Up to 70% energy saving in air infiltration through open cold storage doorway
• +3 more outcomes

Named customers18 records

Segments8 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Three partnerships are on record, tiered minor.

• WS AtkinsminorImplementation/ SI/ Consulting PartnerResearch partnership for energy saving methods in cold storage facilities. WS Atkins is a major engineering consultancy providing expertise for R&D programs on energy efficiency in temperature-controlled storage.
• Daresbury Research CentreminorStrategic or Co-development PartnerResearch partnership for continuous research and development on energy saving methods. Collaborates with Clark Door on understanding energy losses and calculating energy savings and payback periods for cold storage doors.
• International Association of Refrigerated Warehouses (IARW)minorOthersLong-term membership enabling Clark Door to better understand requirements of the temperature controlled storage industry and inform product development.

Scale indicators7 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Hörmann: German-based world's largest manufacturer of doors and door operators, with industrial, high-speed, fire-rated, and roller shutter product lines that directly overlap Clark Door's portfolio. Both sell into commercial, industrial, and logistics customers across Europe.
• Record Doors (ASSA ABLOY): UK-based specialist in high-performance automatic and industrial doors, now part of ASSA ABLOY. Direct UK-market competitor on commercial, industrial, and high-traffic door applications.
• TNR Industrial Doors: UK-based supplier and installer of industrial doors, roller shutters, and high-speed doors. Comparable UK footprint and product overlap with Clark Door's industrial and roller shutter lines.
• Rytec High Performance Doors: US-based manufacturer of high-performance industrial doors including high-speed, cold storage, and security-rated products. Direct overlap with Clark's high-speed, cold store, and security roller shutter offerings.
• Chase Doors (TMI Climate Solutions): North American manufacturer of insulated and high-speed cold storage doors for warehouses, food processing, and distribution. Competes head-to-head with Clark Door's cold storage portfolio.
• Cornell Iron Works: US manufacturer of rolling steel doors, fire doors, and security grilles for industrial and commercial facilities. Overlaps with Clark Door's industrial roller shutter and fire-rated product ranges.
• EFAFLEX: German specialist in high-speed industrial doors including cold storage and freezer applications. Directly comparable to Clark's Coldmaster and high-speed product lines for warehouse and logistics customers.
• Dynaco Doors: Belgian manufacturer of high-speed roll-up doors for industrial and cold storage applications. Competes with Clark Door on rapid-roll freezer/chiller doors for distribution centres.

Broad incumbents

• GEZE: German manufacturer of door, window, and safety technology with industrial and fire-rated door systems. Operates as a broader incumbent in the same specialist door category as Clark Door across European projects.
• ASSA ABLOY Entrance Systems: Global leader in door automation and entrance solutions with industrial and high-performance door portfolios. Operates at much greater scale than Clark Door and competes on specification-driven commercial and industrial projects.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/clark-door-limited
• Instagraminstagram.com/clarkdoorltd

Compliance8 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 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 Clark Door