Company lists · Data refreshed September 2026

Top 25 Steel window manufacturers based in the United Kingdom

Name: Steel window manufacturers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 447 companies tracked

RevenueBase identified 447 steel window manufacturers headquartered in the United Kingdom as of September 2026 and tracks 2,833 professional contacts across them, including 946 with verified work emails. London is the largest hub.

This list covers steel window manufacturers headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 30, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 30, 2026 86% judged on-target in blind review

447Companies

2,833Contacts tracked

946Verified emails

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The 25 largest steel window manufacturers based in the United Kingdom

Ranked by team size

Top 25 of 447 steel window manufacturers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to steel window manufacturers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Emplas Window Systems	Partial evidence	Wellingborough, United KingdomHQ checked Sep 30, 2026	201-500	117 contacts →
	Partial evidence “Emplas is the window and door fabricator of choice, offering a complete range of premium-quality, high-security, energy-efficient windows and doors for the trade installer, new…” Source: RevenueBase Database · checked Sep 30, 2026
2	Schüco UK And Ireland	Strong evidence	Milton Keynes, United KingdomHQ checked Sep 30, 2026	51-200	71 contacts →
	Strong evidence “With over 30 years of experience, Schüco UK Ltd is a leading building envelope specialist supplying high-quality system solutions in aluminium and steel for windows, doors…” Source: RevenueBase Database · checked Sep 30, 2026
3	Unique Window Systems LTD	Partial evidence	Leicester, United KingdomHQ checked Sep 30, 2026	201-500	71 contacts →
	Partial evidence “An award-winning designer, fabricator and installer of UPVC and aluminium windows, doors and curtain walling, Unique Window Systems Ltd specialises in the supply of quality…” Source: RevenueBase Database · checked Sep 30, 2026
4	Crittall Windows LTD	Strong evidence	Witham, United KingdomHQ checked Sep 30, 2026	201-500	69 contacts →
	Strong evidence “Founded in the 1800's, CRITTALL WINDOWS Ltd was the pioneer of hot-rolled steel windows and was responsible for setting up the first steel window manufacturing plants in the…” Source: RevenueBase Database · checked Sep 30, 2026
5	Polyframe	Strong evidence	Lenwade, United KingdomHQ checked Sep 30, 2026	201-500	66 contacts →
	Strong evidence “Polyframe are a multi award-winning manufacturer of high quality windows, doors and conservatories.” Source: RevenueBase Database · checked Sep 30, 2026
6	JPJ Installations LTD	Partial evidence	Braintree, United KingdomHQ checked Sep 30, 2026	51-200	57 contacts →
	Partial evidence “JPJ Installations Ltd are specialists in Aluminium Glazing Systems including Curtain Wall, Framing, Door and Window Systems.” Source: RevenueBase Database · checked Sep 30, 2026
7	EBD Steel Doors	Indirect evidence	Cardiff, United KingdomHQ checked Sep 30, 2026	51-200	50 contacts →
	Indirect evidence “For over 30 years, we've opened doors for our customers.” Source: RevenueBase Database · checked Sep 30, 2026
8	Russell Timber Technology	Strong evidence	Glasgow, United KingdomHQ checked Sep 30, 2026	51-200	39 contacts →
	Strong evidence “For over 55 years, Russell Timber Technology has been the UK’s leading manufacturer of energy efficient, sustainable, precision-engineered Timber and Alu-Clad windows, doors and…” Source: RevenueBase Database · checked Sep 30, 2026
9	RED Systems Limited	Indirect evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	35 contacts →
	Indirect evidence “RED Systems helps main contractors and developers plan and deliver £1m to £10m packages across higher-risk residential, mixed-use and regeneration projects.” Source: RevenueBase Database · checked Sep 30, 2026
10	Metaltech UK	Partial evidence	Dundee, United KingdomHQ checked Sep 30, 2026	11-50	33 contacts →
	Partial evidence “Metaltech UK, situated on the East Coast of Scotland, is a leading Steel Fabrication and Architectural Metalwork company providing services across various sectors throughout the…” Source: RevenueBase Database · checked Sep 30, 2026
11	Acorn Aluminium Limited	Partial evidence	Nottingham, United KingdomHQ checked Sep 30, 2026	51-200	31 contacts →
	Partial evidence “We were founded in Nottingham in 1992, since when we have worked in partnership with commercial contractors, architects and specifiers to design, manufacture and supply aluminium…” Source: RevenueBase Database · checked Sep 30, 2026
12	Cotswold Architectural Products	Partial evidence	Cheltenham, United KingdomHQ checked Sep 30, 2026	501-1,000	31 contacts →
	Partial evidence “Cotswold Architectural Products has been synonymous with excellence in the fenestration industry since 1976, when we became the first company in the UK to manufacture friction…” Source: RevenueBase Database · checked Sep 30, 2026
13	Polar NE	Partial evidence	Middlesbrough, United KingdomHQ checked Sep 30, 2026	51-200	31 contacts →
	Partial evidence “Polar are one of the UK's leading providers of windows, doors, curtain walling, healthcare windows, healthcare doors, brise soleil, louvres and bespoke solutions.” Source: RevenueBase Database · checked Sep 30, 2026
14	FABCO	Strong evidence	Climping, United KingdomHQ checked Sep 30, 2026	51-200	29 contacts →
	Strong evidence “Our creativity and technology continue to transform the steel window industry.” Source: RevenueBase Database · checked Sep 30, 2026
15	Everglade Windows LTD	Partial evidence	Greenford, United KingdomHQ checked Sep 30, 2026	51-200	27 contacts →
	Partial evidence “At Everglade Windows, we are devoted to progressive thinking and pushing boundaries.” Source: RevenueBase Database · checked Sep 30, 2026
16	Martec Engineering Group LTD	Partial evidence	Cambuslang, United KingdomHQ checked Sep 30, 2026	51-200	25 contacts →
	Partial evidence “Founded in 1985 by Martin McHugh a steel fabricator with an entrepreneurial spirit who saw the gap in the market for a specialist metalworker with the capabilities to eliminate…” Source: RevenueBase Database · checked Sep 30, 2026
17	MCJ Fabrications LTD	Indirect evidence	Liversedge, United KingdomHQ checked Sep 30, 2026	11-50	25 contacts →
	Indirect evidence “MCJ Fabrications Ltd is a leading supplier of Architectural Fabrication Services.” Source: RevenueBase Database · checked Sep 30, 2026
18	Arkoni Limited	Strong evidence	Brighouse, United KingdomHQ checked Sep 30, 2026	51-200	22 contacts →
	Strong evidence “Arkoni are the leading manufacturers of steel slimline, fire rated and non-fire rated, windows, doors and curtain walling for internal and external applications.” Source: RevenueBase Database · checked Sep 30, 2026
19	Futuremost Limited	Strong evidence	Portsmouth, United KingdomHQ checked Sep 30, 2026	11-50	22 contacts →
	Strong evidence “Manufacturers and installers of aluminium and uPVC windows, doors, shop fronts and screens.” Source: RevenueBase Database · checked Sep 30, 2026
20	Design & Supply LTD	Strong evidence	Merthyr Tydfil, United KingdomHQ checked Sep 30, 2026	51-200	21 contacts →
	Strong evidence “Design and Supply are specialist manufacturers and suppliers of Industrial Steel Doors and Architectural Products.” Source: RevenueBase Database · checked Sep 30, 2026
21	Heywood Williams Architectural LTD	Partial evidence	Huddersfield, United KingdomHQ checked Sep 30, 2026	51-200	20 contacts →
	Partial evidence “Heywood Williams Architectural Ltd produces state-of-the-art architectural aluminium and steel for use in glazing products, from Schuco curtain walling to shopfronts, aluminium…” Source: RevenueBase Database · checked Sep 30, 2026
22	WD Group	Indirect evidence	Tamworth, United KingdomHQ checked Sep 30, 2026	11-50	19 contacts →
	Indirect evidence “WD Group was established in 1985.” Source: RevenueBase Database · checked Sep 30, 2026
23	Salisbury Glass Centre Limited	Indirect evidence	Fordingbridge, United KingdomHQ checked Sep 30, 2026	11-50	19 contacts →
	Indirect evidence “SALISBURY GLASS CENTRE LIMITED is a company based out of Fordingbridge, Hampshire, United Kingdom.” Source: RevenueBase Database · checked Sep 30, 2026
24	NEW World Developments Limited	Strong evidence	Ballymena, United KingdomHQ checked Sep 30, 2026	201-500	19 contacts →
	Strong evidence “NEW WORLD DEVELOPMENTS LIMITED manufactures a range of window and doors and is based out of Woodside Road Industrial Estate, Ballymena, CO.ANTRIM, United Kingdom.” Source: RevenueBase Database · checked Sep 30, 2026
25	Adey Steelshop LTD	Partial evidence	Loughborough, United KingdomHQ checked Sep 30, 2026	51-200	18 contacts →
	Partial evidence “Adey Steel Shop is the leading supplier of architectural and structural steel to the construction and residential house building sectors.” Source: RevenueBase Database · checked Sep 30, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: steel window manufacturers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names steel window manufacturers.
Partial evidence: Its own public description names part of steel window manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name steel window manufacturers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 447 steel window manufacturers based in the United Kingdom

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Steel window manufacturers based in the United Kingdom at a glance

As of Sep 30, 2026

33.4%Verified-email coverage

6.3Average contacts per company

11-50Median size (employees)

9.2%Largest-city concentration · London

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

204

11-50

175

51-200

201-500

501-1,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 447 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among steel window manufacturers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “steel window manufacturers”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names steel window manufacturers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among steel window manufacturers, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 946 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 30, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Steel window manufacturers by metro

Steel window manufacturers in London41

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names steel window manufacturers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many steel window manufacturers are there based in the United Kingdom?

RevenueBase identified 447 steel window manufacturers headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Emplas Window Systems, headquartered in Wellingborough, tops this list with the largest team on record.

Which city has the most steel window manufacturers?

London leads with 41 headquartered companies, followed by Glasgow (7) and Leeds (7).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 946 verified decision-maker contacts tracked across these 447 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 30, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.