Company lists · Data refreshed September 2026

Top 25 Insulation manufacturers based in the United Kingdom

Name: Insulation 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 17, 2026 881 companies tracked

RevenueBase identified 881 insulation manufacturers headquartered in the United Kingdom as of September 2026 and tracks 11,537 professional contacts across them, including 4,563 with verified work emails. London is the largest hub.

This list covers insulation 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 17, 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 17, 2026 86% judged on-target in blind review

881Companies

11,537Contacts tracked

4,563Verified emails

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The 25 largest insulation manufacturers based in the United Kingdom

Ranked by team size

Top 25 of 881 insulation manufacturers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to insulation 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	SIG PLC	Partial evidence	Sheffield, United KingdomHQ checked Sep 17, 2026	5,001-10,000	1,059 contacts →
	Partial evidence “SIG is a leading pan-European provider of specialist construction and insulation products.” Source: RevenueBase Database · checked Sep 17, 2026
2	Encon & Nevill Long	Partial evidence	Wetherby, United KingdomHQ checked Sep 17, 2026	501-1,000	328 contacts →
	Partial evidence “Insulation, drywall, ceilings, construction products, external facades, flooring, partitioning, passive fire protection: whatever your project, Encon has the product range…” Source: RevenueBase Database · checked Sep 17, 2026
3	Darchem Engineering	Indirect evidence	Stillington, United KingdomHQ checked Sep 17, 2026	501-1,000	317 contacts →
	Indirect evidence “Darchem Engineering Limited is a world class Engineering Company providing products and services primarily to meet the needs of its customers for engineered solutions to high…” Source: RevenueBase Database · checked Sep 17, 2026
4	Minster	Partial evidence	Coventry, United KingdomHQ checked Sep 17, 2026	201-500	214 contacts →
	Partial evidence “Minster is one of the largest growing national specialist insulation and dry lining distributors in the UK.” Source: RevenueBase Database · checked Sep 17, 2026
5	Rockwool UK	Indirect evidence	Bridgend, United KingdomHQ checked Sep 17, 2026	501-1,000	178 contacts →
	Indirect evidence “ROCKWOOL Limited is part of the ROCKWOOL Group.” Source: RevenueBase Database · checked Sep 17, 2026
6	CA Group	Partial evidence	Bishop Auckland, United KingdomHQ checked Sep 17, 2026	201-500	172 contacts →
	Partial evidence “CA Group is the UK's largest manufacturer and contractor of built-up building envelope systems.” Source: RevenueBase Database · checked Sep 17, 2026
7	Galaxy Insulation And DRY Lining Limited	Partial evidence	Sheffield, United KingdomHQ checked Sep 17, 2026	201-500	167 contacts →
	Partial evidence “At Galaxy Insulation & Dry Lining, we’re your nationwide trusted distribution and technical partner.” Source: RevenueBase Database · checked Sep 17, 2026
8	Mannok	Partial evidence	Derrylin, United KingdomHQ checked Sep 17, 2026	501-1,000	165 contacts →
	Partial evidence “Mannok is a leading manufacturer of a diverse range of premium building materials, including Ireland's best performing thermal block, Mannok Aircrete Thermal Blocks, a range of…” Source: RevenueBase Database · checked Sep 17, 2026
9	IKO PLC UK	Partial evidence	Wigan, United KingdomHQ checked Sep 17, 2026	201-500	165 contacts →
	Partial evidence “For over 100 years, we have been producing some of the industry's most innovative roofing, waterproofing, insulation, and infrastructure solutions.” Source: RevenueBase Database · checked Sep 17, 2026
10	Siderise Group	Partial evidence	Maesteg, United KingdomHQ checked Sep 17, 2026	201-500	158 contacts →
	Partial evidence “Siderise is a global expert in the design, manufacture, and supply of high-performance passive fire protection solutions for the building envelope.” Source: RevenueBase Database · checked Sep 17, 2026
11	Press Glass UK	Indirect evidence	Swansea, United KingdomHQ checked Sep 17, 2026	1,001-5,000	132 contacts →
	Indirect evidence “PRESS GLASS WE ARE HERE TO MAKE A DIFFERENCE.” Source: RevenueBase Database · checked Sep 17, 2026
12	Excel Industries	Indirect evidence	Gwent, United KingdomHQ checked Sep 17, 2026	11-50	106 contacts →
	Indirect evidence “Excel Fibre Technology has mastered a manufacturing process which takes waste paper and converts it into cellulose fibre for numerous applications and industries including Warmcel…” Source: RevenueBase Database · checked Sep 17, 2026
13	Instagroup LTD	Indirect evidence	Finchampstead, United KingdomHQ checked Sep 17, 2026	51-200	104 contacts →
	Indirect evidence “Established in 1980, InstaGroup are a UK leader in the energy efficiency industry, covering commercial and residential projects.” Source: RevenueBase Database · checked Sep 17, 2026
14	Clayton Glass	Partial evidence	Stanley, United KingdomHQ checked Sep 17, 2026	501-1,000	94 contacts →
	Partial evidence “Clayton Glass is the UK’s favourite Independent IGU supplier and the UK’s leading Conservatory Roof Glass & Composite Door Glass Manufacturer.” Source: RevenueBase Database · checked Sep 17, 2026
15	Bewi Insulation & Construction UK	Strong evidence	Gravesend, United KingdomHQ checked Sep 17, 2026	201-500	83 contacts →
	Strong evidence “BEWI is one of the leading manufacturers of EPS (expanded polystyrene) and XPS (extruded polystyrene) products and solutions for insulation, construction, industrial and civil…” Source: RevenueBase Database · checked Sep 17, 2026
16	Belgrade Insulations & Drylining	Partial evidence	Leeds, United KingdomHQ checked Sep 17, 2026	51-200	79 contacts →
	Partial evidence “Belgrade Insulation is a privately owned Specialist Distributor of Insulation and Drywall Systems to all sectors of the construction market.” Source: RevenueBase Database · checked Sep 17, 2026
17	A&m Insulations A&m Energy Solutions	Partial evidence	Rainford, United KingdomHQ checked Sep 17, 2026	51-200	70 contacts →
	Partial evidence “We are one of the UK's largest providers of insulation services.” Source: RevenueBase Database · checked Sep 17, 2026
18	Tica-Acad	Partial evidence	Darlington, United KingdomHQ checked Sep 17, 2026	11-50	67 contacts →
	Partial evidence “TICA - the Thermal Insulation Contractors Association - was formed in 1959 with the intention of setting and raising standards in the industrial, thermal insulation industry…” Source: RevenueBase Database · checked Sep 17, 2026
19	Autins Group PLC	Strong evidence	Rugby, United KingdomHQ checked Sep 17, 2026	51-200	60 contacts →
	Strong evidence “The Autins Group develop and manufacture lightweight thermal, filtration and acoustic insulation materials and components for a range of industries.” Source: RevenueBase Database · checked Sep 17, 2026
20	Listers	Partial evidence	Stoke On Trent, United KingdomHQ checked Sep 17, 2026	51-200	59 contacts →
	Partial evidence “Listers manufacture Sheerline Aluminium, Veka Halo, Eurocell & Residence PVCu windows, doors and conservatories, as well as Elitis, Gallery 44 and Timeless brands (among many…” Source: RevenueBase Database · checked Sep 17, 2026
21	A.Proctor Group LTD	Indirect evidence	Blairgowrie, United KingdomHQ checked Sep 17, 2026	51-200	58 contacts →
	Indirect evidence “A.” Source: RevenueBase Database · checked Sep 17, 2026
22	ARC Building Solutions	Indirect evidence	Leeds, United KingdomHQ checked Sep 17, 2026	51-200	58 contacts →
	Indirect evidence “At ARC® Building Solutions, protection is our purpose.” Source: RevenueBase Database · checked Sep 17, 2026
23	Repl International LTD	Partial evidence	Swindon, United KingdomHQ checked Sep 17, 2026	201-500	56 contacts →
	Partial evidence “We are a manufacturer of heatshrink, coldshrink, cable joints, splices & accessory products for Electric Utilities globally with over 35 years of experience.” Source: RevenueBase Database · checked Sep 17, 2026
24	Tekgroup	Partial evidence	Rotherham, United KingdomHQ checked Sep 17, 2026	51-200	55 contacts →
	Partial evidence “We specialise in Insulation & Acoustics, Groundworks, Screeds, Render, Underfloor Heating Solutions, Dry Screed, Drylining Solutions, Passive Fire Protection and Fixings &…” Source: RevenueBase Database · checked Sep 17, 2026
25	Superglass Insulation By Etex	Indirect evidence	Stirling, United KingdomHQ checked Sep 17, 2026	201-500	55 contacts →
	Indirect evidence “We can offer you thermal and acoustic glass mineral wool products that meet exacting standards together with a service that’s tailored to you.” Source: RevenueBase Database · checked Sep 17, 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: insulation 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 insulation manufacturers.
Partial evidence: Its own public description names part of insulation manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name insulation 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 881 insulation manufacturers based in the United Kingdom

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Insulation manufacturers based in the United Kingdom at a glance

As of Sep 17, 2026

39.6%Verified-email coverage

13.1Average contacts per company

11-50Median size (employees)

5.9%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

371

11-50

343

51-200

111

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 881 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 insulation 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 “insulation 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 insulation 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 insulation 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, 4,563 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 17, 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.

Insulation manufacturers by metro

Insulation manufacturers in London52

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 insulation 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 insulation manufacturers are there based in the United Kingdom?

RevenueBase identified 881 insulation 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?

SIG PLC, headquartered in Sheffield, tops this list with the largest team on record.

Which city has the most insulation manufacturers?

London leads with 52 headquartered companies, followed by Birmingham (20) and Manchester (19).

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 4,563 verified decision-maker contacts tracked across these 881 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 17, 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.