Company lists · Data refreshed September 2026

Top 25 Sustainable insulation manufacturers based in the United Kingdom

Name: Sustainable 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 18, 2026 419 companies tracked

RevenueBase identified 419 sustainable insulation manufacturers headquartered in the United Kingdom as of September 2026 and tracks 4,484 professional contacts across them, including 1,820 with verified work emails. London is the largest hub.

This list covers sustainable 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 18, 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 18, 2026 86% judged on-target in blind review

419Companies

4,484Contacts tracked

1,820Verified emails

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The 25 largest sustainable insulation manufacturers based in the United Kingdom

Ranked by team size

Top 25 of 419 sustainable insulation manufacturers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 18, 2026. RevenueBase Smart Search rates how each company's information relates to sustainable 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	Rockwool UK	Indirect evidence	Bridgend, United KingdomHQ checked Sep 18, 2026	501-1,000	178 contacts →
	Indirect evidence “ROCKWOOL Limited is part of the ROCKWOOL Group.” Source: RevenueBase Database · checked Sep 18, 2026
2	Genuit Group	Partial evidence	Leeds, United KingdomHQ checked Sep 18, 2026	1,001-5,000	133 contacts →
	Partial evidence “At Genuit Group, we’re driven by a clear purpose: to create a more sustainable built environment and a more resilient future for people and the planet.” Source: RevenueBase Database · checked Sep 18, 2026
3	Alumasc Building Products LTD	Partial evidence	St Helens, United KingdomHQ checked Sep 18, 2026	51-200	119 contacts →
	Partial evidence “We are passionate about our purpose to provide high-quality, low carbon, sustainable building products, systems and solutions which help to manage the scarce resources of water…” Source: RevenueBase Database · checked Sep 18, 2026
4	Excel Industries	Indirect evidence	Gwent, United KingdomHQ checked Sep 18, 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 18, 2026
5	Instagroup LTD	Indirect evidence	Finchampstead, United KingdomHQ checked Sep 18, 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 18, 2026
6	Bewi Insulation & Construction UK	Strong evidence	Gravesend, United KingdomHQ checked Sep 18, 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 18, 2026
7	A&m Insulations A&m Energy Solutions	Partial evidence	Rainford, United KingdomHQ checked Sep 18, 2026	51-200	70 contacts →
	Partial evidence “We are one of the UK's largest providers of insulation services.” Source: RevenueBase Database · checked Sep 18, 2026
8	Superglass Insulation By Etex	Indirect evidence	Stirling, United KingdomHQ checked Sep 18, 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 18, 2026
9	MAX Energy LTD	Partial evidence	Leicester, United KingdomHQ checked Sep 18, 2026	201-500	53 contacts →
	Partial evidence “Max Energy Ltd is a UK based new build construction company specialising in the sale of insulation to the new build housing sector on a supply and install basis.” Source: RevenueBase Database · checked Sep 18, 2026
10	Wetherby Wall Systems	Partial evidence	Golborne, United KingdomHQ checked Sep 18, 2026	51-200	50 contacts →
	Partial evidence “Wetherby Wall Systems Ltd \| Part of ROCKWOOL Group: Your Source for Premium External Wall Insulation and Render Solutions.” Source: RevenueBase Database · checked Sep 18, 2026
11	TLX Insulation	Partial evidence	Bolton, United KingdomHQ checked Sep 18, 2026	11-50	49 contacts →
	Partial evidence “TLX Insulation, a division of TLX Manufacturing, produces multifoil insulation and insulating breathable membranes.” Source: RevenueBase Database · checked Sep 18, 2026
12	The Alumasc Group PLC	Partial evidence	Burton Latimer, United KingdomHQ checked Sep 18, 2026	501-1,000	47 contacts →
	Partial evidence “We are passionate about our purpose to provide high-quality, low carbon, sustainable building products, systems and solutions which help manage the scarce resources of water and…” Source: RevenueBase Database · checked Sep 18, 2026
13	Sureserve Energy Services North	Partial evidence	Brighouse, United KingdomHQ checked Sep 18, 2026	1,001-5,000	43 contacts →
	Partial evidence “Sureserve Energy Services North is a leading national installer of insulation, heating solutions and renewable technologies.” Source: RevenueBase Database · checked Sep 18, 2026
14	The Installation Assurance Authority The IAA	Indirect evidence	Leighton Buzzard, United KingdomHQ checked Sep 18, 2026	51-200	42 contacts →
	Indirect evidence “The Installation Assurance Authority (IAA) is the industry body that provides a quality assurance framework covering consumer protection, technical guidance, Certification…” Source: RevenueBase Database · checked Sep 18, 2026
15	Avonside Energy	Strong evidence	Rearsby, United KingdomHQ checked Sep 18, 2026	201-500	42 contacts →
	Strong evidence “Avonside Energy: Your Partner in Sustainable Building Solutions At Avonside Energy, we are dedicated to delivering best-in-class services across: New Build Insulation…” Source: RevenueBase Database · checked Sep 18, 2026
16	Kingspan Technical Insulation LTD	Strong evidence	Basildon, United KingdomHQ checked Sep 18, 2026	51-200	40 contacts →
	Strong evidence “We manufacture high performance insulation products for pipework and ductwork in building services / HVAC, process, petrochemical and refrigeration services applications.” Source: RevenueBase Database · checked Sep 18, 2026
17	Protec Temporary Protection	Partial evidence	Adlington, United KingdomHQ checked Sep 18, 2026	51-200	39 contacts →
	Partial evidence “With over 30 years of expertise, Protec International Ltd is Europe’s leading manufacturer and supplier of Temporary Protection materials – designed to safeguard surfaces…” Source: RevenueBase Database · checked Sep 18, 2026
18	Homelogic	Indirect evidence	Southampton, United KingdomHQ checked Sep 18, 2026	51-200	38 contacts →
	Indirect evidence “Homelogic®, based in Southampton, Hampshire, are an innovative, forward-thinking company dedicated to bringing eco-friendly, cost effective energy saving solutions to the homes…” Source: RevenueBase Database · checked Sep 18, 2026
19	Soltherm External Insulations	Indirect evidence	Milton Keynes, United KingdomHQ checked Sep 18, 2026	11-50	34 contacts →
	Indirect evidence “Soltherm are producers of the highest quality EWI system in the world and our mission is to supply these building materials and solutions to the British market.” Source: RevenueBase Database · checked Sep 18, 2026
20	Cellecta LTD	Strong evidence	Rochester, United KingdomHQ checked Sep 18, 2026	51-200	32 contacts →
	Strong evidence “The UK's no.1 manufacturer of eco friendly acoustic treatments and specialist insulation products.” Source: RevenueBase Database · checked Sep 18, 2026
21	Envirobuild	Partial evidence	London, United KingdomHQ checked Sep 18, 2026	11-50	32 contacts →
	Partial evidence “EnviroBuild is a leader in sustainable construction, where the materials we supply have significant environmental benefits over traditional products.” Source: RevenueBase Database · checked Sep 18, 2026
22	Isoclad	Indirect evidence	North Shields, United KingdomHQ checked Sep 18, 2026	51-200	31 contacts →
	Indirect evidence “We focus on making reliable panels and supporting you at every stage.” Source: RevenueBase Database · checked Sep 18, 2026
23	Actis Insulation	Partial evidence	Chippenham, United KingdomHQ checked Sep 18, 2026	11-50	28 contacts →
	Partial evidence “ACTIS is an innovative European insulation specialist whose vision is to develop effective and environmentally friendly ways of reducing energy consumption.” Source: RevenueBase Database · checked Sep 18, 2026
24	YBS Insulation	Partial evidence	Creswell, United KingdomHQ checked Sep 18, 2026	11-50	25 contacts →
	Partial evidence “YBS Insulation has grown steadily over the years from a one man operation producing one product in 1994 to the large manufacturing and distribution company it is today with an…” Source: RevenueBase Database · checked Sep 18, 2026
25	ECO 247	Partial evidence	St Asaph, United KingdomHQ checked Sep 18, 2026	51-200	25 contacts →
	Partial evidence “At Eco 247, we are committed to building a greener future through sustainable energy solutions.” Source: RevenueBase Database · checked Sep 18, 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: sustainable 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 sustainable insulation manufacturers.
Partial evidence: Its own public description names part of sustainable insulation manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainable 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 419 sustainable insulation manufacturers based in the United Kingdom

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Sustainable insulation manufacturers based in the United Kingdom at a glance

As of Sep 18, 2026

40.6%Verified-email coverage

10.7Average contacts per company

11-50Median size (employees)

7.9%Largest-city concentration · London

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

190

11-50

162

51-200

201-500

501-1,000

1,001-5,000

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 419 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 sustainable 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 “sustainable 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 sustainable 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 sustainable 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, 1,820 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 18, 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.

Sustainable insulation manufacturers by metro

Sustainable insulation manufacturers in London33

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 sustainable 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 sustainable insulation manufacturers are there based in the United Kingdom?

RevenueBase identified 419 sustainable 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?

Rockwool UK, headquartered in South Wales, tops this list with the largest team on record.

Which city has the most sustainable insulation manufacturers?

London leads with 33 headquartered companies, followed by Manchester (11) and Glasgow (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 1,820 verified decision-maker contacts tracked across these 419 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 18, 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.