Doortechnik

What Doortechnik does

DoorTechnik Ltd is a privately held, family-owned UK manufacturer of custom-built doors, headquartered and operating from a single manufacturing facility in Lincoln. The company designs and produces bespoke steel, glass, and specialist doorsets — including fire-rated (up to FD240), security-rated (LPS 1175 SR2-SR4, PAS 24), acoustic (33-41dB Rw), blast-rated (47 kN/m²), powered automatic, and public-convenience variants — built to customer specifications with extensive size, finish, hardware, and configuration flexibility.

The product portfolio spans a core G15/E12 general-purpose steel range, a G20 heavy-duty and blast platform, an SG20/GL15 glass door family using Forster steel profile systems, security-rated X15/X20 doors, acoustic AC15, stainless RX15, wood-effect WE15, and a dedicated toilet-door line (T15/T15+/U15/UL15). Manufacturing technology combines precision steel fabrication, powder coating, automated assembly, and in-house testing before dispatch, with installation services provided across the UK and Ireland and exports worldwide.

The business model is B2B specification-led: DoorTechnik engages architects, main contractors, and facility managers early in project design to provide NBS specification documentation and bespoke design advice. Revenue is generated through one-time, quote-based project sales of complete doorsets (frame, ironmongery, locking) plus installation and specification-support services, with no publicly disclosed standard pricing. Customers span heritage/listed buildings, commercial offices, hospitality, industrial sites, retail, transport hubs, schools, government facilities, and high-security utility sites; named enterprise logos include John Lewis Partnership, Rolls-Royce, Vinci Construction, Galliford Try, Pizza Hut, and Doncaster Council.

Name

Doortechnik

Legal name

DoorTechnik Ltd

Website

https://doortechnik.co.uk

Company type

Private

Founded year

2000

Operating status

Operating

Headcount range

11–50 employees

Short description

DoorTechnik is a family-owned Lincoln-based UK manufacturer of custom-built steel, glass, security, fire, acoustic, and blast-rated doorsets, supplying architects, main contractors, and facility managers across the UK, Ireland, and worldwide export markets via a specification-led B2B model.

Ownership category

akta.pro rank

Product category

Commercial Door Manufacturing

NAICS

Metal Window and Door Manufacturing (332321), Ornamental and Architectural Metal Products Manufacturing (33232), Sheet Metal Work Manufacturing (332322)

SIC

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

akta.pro primary industry

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

akta.pro secondary industries

Exterior Doors (IMADAIAA), Interior Doors (IMADAIAB), Architectural Hardware & Door Controls (Hinges, Locks, Closers, Panic Devices) (IMADAIAI)

Keywords

• Custom steel doors
• Fire rated doors
• Glass entrance doors
• Security doorsets
• Blast resistant doors

Headquarters

HQ city

Lincoln

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Door Manufacturing and Sales: DoorTechnik designs and manufactures custom built steel doors, glass doors, security doors, fire doors, acoustic doors, and blast doors. Products are sold as complete doorsets including frames, ironmongery, and locking systems. Pricing is quote-based and project-specific, with no standardized product pricing publicly disclosed.
2. Door Installation Services: The company installs doors throughout the UK and Ireland from their Lincoln factory. Installation services are offered alongside product sales for complete project delivery.
3. Technical Specification Services: NBS specification documentation and door specification advice provided as part of the specification support process for architects and specifiers.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

DoorTechnik designs and manufactures custom-built steel doors, glass doors, security doors, fire doors, acoustic doors, and blast doorsets from its Lincoln, UK factory. Products are sold as complete doorsets including frames, ironmongery, and locking systems, with bespoke sizing, finishes, and configurations tailored to project specifications. The company also provides door installation services across the UK and Ireland.

Product overview

Doortechnik is a family-owned UK manufacturer of custom-built steel, glass, and specialized doors based in Lincoln. The product portfolio centers on three core door types: steel doors (G15, G20, E12), glass doors (SG20 fire-rated, GL15 frameless), and specialized doors (security-rated X15/X20, acoustic AC15, blast-rated BR20, wood-effect WE15, stainless RX15, and multiple toilet door variants). The G15 serves as the versatile flagship steel doorset while the SG20 is the primary fire-rated glass door. Supporting products include SGP fire-rated glass partitions and various components (frames, thresholds, locking systems, closers). Products are manufactured to order with extensive customization options for colors, finishes, hardware, and configurations. The company supplies and installs throughout the UK and Ireland and exports globally.

Differentiator

Problem solved

Functional benefit

Products and services

• G15 Steel Door

Quantifiable outcome

• Fire doors achieve up to 4-hour (FD240) integrity ratings tested to BS 476 or BS EN 1634
• +5 more outcomes

Named customers17 records

Segments8 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature6 records

Partnerships

Eleven partnerships are on record, tiered core and minor.

• Vinci ConstructioncoreImplementation/ SI/ Consulting PartnerMain contractor for Buxton Crescent historic building refurbishment project. DoorTechnik supplied and installed powered GL15 glass door working directly with Vinci and the architect on specification and installation.
• Curious (Architects)coreStrategic or Co-development PartnerArchitecture firm that specified DoorTechnik GL15 frameless glass doors for Grade I listed Buxton Crescent building. Collaborated on design to achieve modern functionality while preserving historic character.
• Barwest FabricationscoreImplementation/ SI/ Consulting PartnerMain contractor partner for Synergy House Corten-clad powered door project in London. Worked closely with DoorTechnik on bespoke doorset design combining G15 and SG20 elements with custom hinge development.
• Braithwaite EngineerscoreStrategic or Co-development PartnerEngineering partner for Lincoln Eastern Bypass road bridge project. Collaborated with DoorTechnik on specifying G15 steel doors for bridge maintenance access with custom sub-frames for angled concrete openings.
• Galliford TrycoreImplementation/ SI/ Consulting PartnerMain contractor for Lincoln Eastern Bypass construction project. DoorTechnik worked closely with Galliford Try to design and install G15 doors during scheduled lane closures over live railway lines.
• S J ThompsonminorImplementation/ SI/ Consulting PartnerContractor partner for John Lewis Partnership head office door replacement project. DoorTechnik submitted designs based on SG20 glass doors approved by the client.
• Beanland AssociatescoreStrategic or Co-development PartnerArchitecture firm specifying fire resistant glass doors for The Angel Hotel refurbishment. DoorTechnik worked closely with Beanland to arrive at EI30 fire rating specification and Antique Brass finish.
• Colnesett LimitedminorImplementation/ SI/ Consulting PartnerMain contractors for The Angel Hotel project who received electrical connection specifications from DoorTechnik for electro-mechanical door closers linked to fire alarm system.
• FP DesignminorChannel Partner/ Reseller/ DistributorDesign firm commissioning wood-clad gate replacements for London properties. DoorTechnik manufactured G15 doorsets with timber cladding through FP Design.
• Professional Buildings Maintenance (PBM)coreChannel Partner/ Reseller/ DistributorDoncaster Council's in-house maintenance team responsible for plant room refurbishments. DoorTechnik has provided G15 steel doors and louvre doors for multiple council properties through PBM.
• Forster Profile SystemscoreTechnology or IntegrationSteel profile system supplier for SG20 glass doors. DoorTechnik uses Forster Presto 50, Fuego Light, Norm, and Unico profiles selected according to performance requirements for fire rating, thermal efficiency, and usage intensity.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Halspan: UK-based specialist manufacturer of fire-rated door cores, doorsets, and glazing systems. Comparable to DoorTechnik in third-party-certified fire doors and glass firescreens, competing on the same specification-led projects.
• Premdor: UK manufacturer of interior and exterior timber, composite, and fire-rated doorsets. Comparable to DoorTechnik in custom-built UK doorsets for residential and commercial construction, serving main contractors and developers through specification channels.
• Leaderflush Shapland: UK heritage door brand (now part of ASSA ABLOY) producing high-performance timber and composite doorsets for healthcare, education, and commercial markets. Comparable to DoorTechnik in specification-led custom doors for commercial and institutional UK projects.
• GEZE: German manufacturer of door, window, and safety technology including automatic glass doors and integrated access systems. Comparable to DoorTechnik in powered glass entrance doors (e.g. GL15 with operators) and integration with access control, though GEZE is far larger and more internationally distributed.
• Bradbury Group: UK-based manufacturer of steel doors and security doorsets, including certified fire and LPS 1175-rated products. Closest direct competitor to DoorTechnik in the UK steel/security door specification market, with overlapping customers and similar product positioning.
• Hörmann: Germany-headquartered global manufacturer of steel, industrial, fire, and security doors, plus operators. Comparable to DoorTechnik because it serves the same commercial/industrial specification market with certified steel doorsets, though at much greater scale and with broader distribution.

Broad incumbents

• ASSA ABLOY: Global leader in door opening solutions including steel doors, fire doors, and access control. Comparable to DoorTechnik across fire/security door and access integration (e.g. Salto), but operates as a multi-brand conglomerate far larger and broader than DoorTechnik's niche.
• Jeld-Wen: Global manufacturer of doors and windows including steel, timber, and composite doorsets for residential and commercial markets. Comparable to DoorTechnik in custom commercial doors and heritage-grade wood-effect doors (DoorTechnik's WE15), though Jeld-Wen serves a much broader, more standardised volume market.
• dormakaba: Swiss-listed supplier of doors, automatic entrances, and access solutions (formed from Dorma + Kaba). Comparable to DoorTechnik in glass entrance doors, powered operators, and access-controlled commercial doors, with substantially larger scale and global service coverage.
• Allegion: US-listed pure-play security products company producing steel doors, locks, and access control. Comparable to DoorTechnik in security-rated doors and integration with electronic access, but operates across a much wider portfolio and geographic footprint.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights6 records

Customer concentration

• Xx.com/doortechnik
• LinkedInlinkedin.com/company/doortechnik

Compliance2 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 Doortechnik