Company lists · Data refreshed September 2026

Top 25 Rockwool insulation manufacturers worldwide

RevenueBase identified 958 rockwool insulation manufacturers worldwide as of September 2026 and tracks 19,864 professional contacts across them, including 5,666 with verified work emails. The United States is the largest market and Istanbul the largest hub.

This list covers rockwool insulation manufacturers worldwide, 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. Country and city lists for rockwool insulation manufacturers follow the table.

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
958Companies
19,864Contacts tracked
5,666Verified emails
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The 25 largest rockwool insulation manufacturers worldwide

Ranked by team size
Top 25 of 958 rockwool insulation manufacturers worldwide, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to rockwool 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceHedehusene, DenmarkHQ checked Sep 30, 202610001+2,632 contacts →

Partial evidence

“At ROCKWOOL, everything we do is based on releasing the natural power of stone to enrich modern living.”

Source: RevenueBase Database · checked Sep 30, 2026
2Strong evidenceVise, BelgiumHQ checked Sep 30, 20265,001-10,0001,935 contacts →

Strong evidence

“Knauf Insulation is one of the world’s largest manufacturers of insulation products and solutions.”

Source: RevenueBase Database · checked Sep 30, 2026
3Partial evidenceBrussels, BelgiumHQ checked Sep 30, 20261,001-5,000707 contacts →

Partial evidence

“Recticel Group is a leading insulation company with headquarters in Belgium and operations in eight countries across Europa and the US.”

Source: RevenueBase Database · checked Sep 30, 2026
4Strong evidenceMadrid, SpainHQ checked Sep 30, 20261,001-5,000605 contacts →

Strong evidence

“URSA is a company dedicated to the manufacture and commercialization of thermal and acoustic insulation materials oriented towards sustainability and energy efficiency in…”

Source: RevenueBase Database · checked Sep 30, 2026
5Partial evidenceCharlotte, NC, United StatesHQ checked Sep 30, 20261,001-5,000571 contacts →

Partial evidence

“SPI is a global leader in the Distribution and Specialty Fabrication of insulation products for Thermal, Acoustic, Fire Protection and Refractory applications.”

Source: RevenueBase Database · checked Sep 30, 2026
6Indirect evidenceHelsinki, FinlandHQ checked Sep 30, 20261,001-5,000501 contacts →

Indirect evidence

“When you work with us you are making the world a better place.”

Source: RevenueBase Database · checked Sep 30, 2026
7Indirect evidenceİstanbul, TürkiyeHQ checked Sep 30, 2026501-1,000295 contacts →

Indirect evidence

“Tarihçe Türkiye yalıtım sektörünün öncüsü olarak 1965 yılında kurulan İzocam A.Ş'nin Gebze'deki ilk fabrikası 1967 yılında camyünü üretimine başlayarak faaliyete geçmiştir.”

Source: RevenueBase Database · checked Sep 30, 2026
8Indirect evidenceParis, FranceHQ checked Sep 30, 2026501-1,000255 contacts →

Indirect evidence

“Nous révélons les bienfaits de la roche, ressource naturelle abondante pour relever les enjeux planétaires.”

Source: RevenueBase Database · checked Sep 30, 2026
9Indirect evidenceAlahmadi, KuwaitHQ checked Sep 30, 2026501-1,000172 contacts →

Indirect evidence

“KIMMCO-Isover, is a joint-venture between the International Leader in Construction Products and which considered one of the largest, privately owned companies in the Gulf region…”

Source: RevenueBase Database · checked Sep 30, 2026
10Partial evidenceMumbai, IndiaHQ checked Sep 30, 20261,001-5,000158 contacts →

Partial evidence

“Saint-Gobain India – Insulation Business, as part of the global Saint-Gobain Group, carries a legacy woven from innovation and purpose.”

Source: RevenueBase Database · checked Sep 30, 2026
11Partial evidenceCigacice, PolandHQ checked Sep 30, 20261,001-5,000150 contacts →

Partial evidence

“Jesteśmy częścią globalnej Grupy ROCKWOOL – lidera w produkcji innowacyjnych rozwiązań z wełny skalnej.”

Source: RevenueBase Database · checked Sep 30, 2026
12Strong evidenceCharlotte, United StatesHQ checked Sep 30, 2026201-500148 contacts →

Strong evidence

“Established in and headquartered in Charlotte, N.C, Greenfiber is the largest manufacturer of cellulose insulation and fire and sound products.”

Source: RevenueBase Database · checked Sep 30, 2026
13Strong evidenceDandenong South, AustraliaHQ checked Sep 30, 2026201-500147 contacts →

Strong evidence

“Fletcher Insulation stands as a leading Australian manufacturer, distributor, and technical support provider for the building construction industry in insulation.”

Source: RevenueBase Database · checked Sep 30, 2026
14Indirect evidenceOslo, NorwayHQ checked Sep 30, 2026201-500145 contacts →

Indirect evidence

“Glavagruppen is a Norwegian industrial company with head office in Askim, plants in Askim and Stjørdal, and central office for administration, sales and marketing in Oslo.”

Source: RevenueBase Database · checked Sep 30, 2026
15Strong evidenceDenver, CO, United StatesHQ checked Sep 30, 2026201-500141 contacts →

Strong evidence

“JM is the leading manufacturer of thermal insulation solutions for high and low-temperature industrial applications.”

Source: RevenueBase Database · checked Sep 30, 2026
16Indirect evidenceIstanbul, TürkiyeHQ checked Sep 30, 2026201-500140 contacts →

Indirect evidence

“1985 yılında taahhüt faaliyetleriyle ticaret hayatına başlayan ve 1996 yılında üretici kimliğine kavuşarak, yapı ve teknik yalıtım olmak üzere 2 ana kategoride üretim yapan ODE…”

Source: RevenueBase Database · checked Sep 30, 2026
17Partial evidenceYoungsville, NC, United StatesHQ checked Sep 30, 2026201-500133 contacts →

Partial evidence

“K-FLEX USA is the North American division of the IK Insulation Group, an innovative leader in flexible elastomeric foam insulation with 12 production facilities worldwide and a…”

Source: RevenueBase Database · checked Sep 30, 2026
18Indirect evidenceBillesholm, SwedenHQ checked Sep 30, 2026201-500128 contacts →

Indirect evidence

“Svensktillverkad isolering sedan mer än 90 år Mer än nittio procent av det isolermaterial som Isover levererar inom Sverige produceras i fabriken i skånska Billesholm, där vi…”

Source: RevenueBase Database · checked Sep 30, 2026
19Strong evidenceGreenville, SC, United StatesHQ checked Sep 30, 202651-200120 contacts →

Strong evidence

“Silvercote, a Service Partners company, manufactures high-quality metal building insulation products customized to project specifications.”

Source: RevenueBase Database · checked Sep 30, 2026
20Partial evidenceGladbeck, GermanyHQ checked Sep 30, 20261,001-5,000118 contacts →

Partial evidence

“Die DEUTSCHE ROCKWOOL bietet Dämmlösungen aus nichtbrennbarer Steinwolle für die Dämmung von Gebäudehülle, Innenausbau und Gebäudetechnik an.”

Source: RevenueBase Database · checked Sep 30, 2026
21Indirect evidenceJd, NetherlandsHQ checked Sep 30, 202651-200117 contacts →

Indirect evidence

“For over 25 years, our products have helped to create comfortable and beautiful spaces that are as impressive now as the day they were unveiled.”

Source: RevenueBase Database · checked Sep 30, 2026
22Partial evidenceCairo, EgyptHQ checked Sep 30, 2026201-500112 contacts →

Partial evidence

“GlassRock Insulation Company is a member of Citadel Capital, inaugurated in Egypt since 2008 and located in the Sadat Free Zone Area, at an equal distance from Cairo and…”

Source: RevenueBase Database · checked Sep 30, 2026
23Indirect evidenceMadrid, SpainHQ checked Sep 30, 2026201-500112 contacts →

Indirect evidence

“Knauf es una multinacional alemana, líder mundial en la fabricación de placas de yeso laminado y productos para la construcción en seco y uno de los principales fabricantes de…”

Source: RevenueBase Database · checked Sep 30, 2026
24Indirect evidenceİstanbul, TürkiyeHQ checked Sep 30, 2026201-500108 contacts →

Indirect evidence

“Eryap Group and Trade Inc.”

Source: RevenueBase Database · checked Sep 30, 2026
25Indirect evidenceGuararema, BrazilHQ checked Sep 30, 2026201-500104 contacts →

Indirect evidence

“A Rockfibras desde 1960 fabrica isolantes térmicos e acústicos em Lã de Rocha THERMAX® e Silicato de cálcio ROCK-SIL®.”

Source: RevenueBase Database · checked Sep 30, 2026

Showing 25 of 958 rockwool insulation manufacturers worldwide

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Rockwool insulation manufacturers worldwide at a glance

As of Sep 30, 2026
28.5%Verified-email coverage
20.7Average contacts per company
11-50Median size (employees)
1.5%Largest-city concentration · Istanbul
Sep 30, 2026Page data refreshed

Companies by employee count

1-10
330
11-50
271
51-200
182
201-500
92
501-1,000
26
1,001-5,000
28
5,001-10,000
9
10001+
7

Email recency is reported on each country list linked below.

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 rockwool 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.
Coverage
Every country. Country and city lists for rockwool insulation manufacturers are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “rockwool 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 rockwool 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 rockwool insulation manufacturers, and records with no verified work email.
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, 5,666 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.

Rockwool insulation manufacturers by location

7 lists · largest first

Every Rockwool insulation manufacturers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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 rockwool 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 rockwool insulation manufacturers are there worldwide?

RevenueBase identified 958 rockwool insulation manufacturers worldwide 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 Group, headquartered in Hedehusene, tops this list with the largest team on record.

Which country has the most rockwool insulation manufacturers?

The United States leads with 77 companies, followed by India (74) and the United Kingdom (40). Every rockwool insulation manufacturers list by country and city is linked on this page.

Which city has the most rockwool insulation manufacturers?

Istanbul leads with 14 headquartered companies, followed by London (6) and Karachi (5).

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 5,666 verified decision-maker contacts tracked across these 958 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.