Company lists · Data refreshed September 2026

Top 25 Polyisocyanurate insulation manufacturers worldwide

Name: Polyisocyanurate insulation manufacturers worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 2,158 companies tracked

RevenueBase identified 2,158 polyisocyanurate insulation manufacturers worldwide as of September 2026 and tracks 29,679 professional contacts across them, including 8,617 with verified work emails. The United States is the largest market and Istanbul the largest hub.

This list covers polyisocyanurate 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 polyisocyanurate 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

2,158Companies

29,679Contacts tracked

8,617Verified emails

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The 25 largest polyisocyanurate insulation manufacturers worldwide

Ranked by team size

Top 25 of 2,158 polyisocyanurate 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 polyisocyanurate 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	Knauf Insulation	Strong evidence	Vise, BelgiumHQ checked Sep 30, 2026	5,001-10,000	1,935 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
2	Armacell	Partial evidence	Capellen, LuxembourgHQ checked Sep 30, 2026	1,001-5,000	1,314 contacts →
	Partial evidence “ARMACELL - DRIVING ENERGY EFFICIENCY Armacell is the inventor of flexible elastomeric foams for equipment insulation.” Source: RevenueBase Database · checked Sep 30, 2026
3	Kingspan Insulation	Strong evidence	Leominster, United StatesHQ checked Sep 30, 2026	1,001-5,000	955 contacts →
	Strong evidence “Kingspan Insulation is the industry leading manufacturer of innovative insulation solutions, which help create a more sustainable and energy efficient built environment.” Source: RevenueBase Database · checked Sep 30, 2026
4	Recticel	Partial evidence	Brussels, BelgiumHQ checked Sep 30, 2026	1,001-5,000	707 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
5	Topbuild	Indirect evidence	Daytona Beach, FL, United StatesHQ checked Sep 30, 2026	n/a	692 contacts →
	Indirect evidence “TopBuild is now QXO.” Source: RevenueBase Database · checked Sep 30, 2026
6	Ursa By Etex	Strong evidence	Madrid, SpainHQ checked Sep 30, 2026	1,001-5,000	605 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
7	SPI	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 30, 2026	1,001-5,000	571 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
8	Kingspan Insulated Panels North America	Partial evidence	Deland, FL, United StatesHQ checked Sep 30, 2026	1,001-5,000	348 contacts →
	Partial evidence “Who We Are: Kingspan is a trusted leader in the design, manufacture and supply of high performance building products and solutions for the global property and construction…” Source: RevenueBase Database · checked Sep 30, 2026
9	Isopan	Partial evidence	Trevenzuolo Verona, ItalyHQ checked Sep 30, 2026	201-500	215 contacts →
	Partial evidence “Isopan, part of the Joint Venture between MANNI and Marcegaglia, is a leading manufacturer worldwide of insulated metal panels for walls and roofs.” Source: RevenueBase Database · checked Sep 30, 2026
10	Kingspan Unidek	Partial evidence	Gemert, NetherlandsHQ checked Sep 30, 2026	10001+	209 contacts →
	Partial evidence “Kingspan Unidek is a supplier of innovative solutions for fast and efficient construction and insulation.” Source: RevenueBase Database · checked Sep 30, 2026
11	Synthesia Technology Group	Strong evidence	Castellbisbal Cataluna, SpainHQ checked Sep 30, 2026	201-500	191 contacts →
	Strong evidence “Company specialized in the manufacture and commercialization of chemical products, polyester polyols and polyurethane systems for thermal and acoustic insulation and diverse…” Source: RevenueBase Database · checked Sep 30, 2026
12	OXXO	Indirect evidence	Bordj Bou Arreridj, AlgeriaHQ checked Sep 30, 2026	501-1,000	175 contacts →
	Indirect evidence “Solutions d'isolation à hautes performances thermiques, acoustiques et d'étanchéité” Source: RevenueBase Database · checked Sep 30, 2026
13	USA Insulation	Partial evidence	Cleveland, OH, United StatesHQ checked Sep 30, 2026	51-200	169 contacts →
	Partial evidence “Established in 1977 and incorporated in 1985, USA Insulation has saved thousands of customers millions of dollars on their heating and air conditioning bills.” Source: RevenueBase Database · checked Sep 30, 2026
14	Actis Isolation	Indirect evidence	Limoux, FranceHQ checked Sep 30, 2026	201-500	166 contacts →
	Indirect evidence “PME familiale, née il y a 40 ans, la société Actis met au point un concept d’isolant avant-gardiste.” Source: RevenueBase Database · checked Sep 30, 2026
15	Saint-Gobain India	Partial evidence	Mumbai, IndiaHQ checked Sep 30, 2026	1,001-5,000	158 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
16	Sofradi	Indirect evidence	Treillières, FranceHQ checked Sep 30, 2026	201-500	155 contacts →
	Indirect evidence “Installée sur 30 dans l’agglomération nantaise, SOFRADI, SOciété FRAnçaise D’Isolation s’impose depuis 1977 sur le marché de l’isolation.” Source: RevenueBase Database · checked Sep 30, 2026
17	Insulfoam	Indirect evidence	Puyallup, WA, United StatesHQ checked Sep 30, 2026	501-1,000	149 contacts →
	Indirect evidence “Insulfoam, a division of Carlisle Construction Materials, is the largest manufacutrer of block molded Expanded Polysytrene (EPS) products in North America.” Source: RevenueBase Database · checked Sep 30, 2026
18	Greenfiber	Strong evidence	Charlotte, United StatesHQ checked Sep 30, 2026	201-500	148 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
19	Fletcher Insulation	Strong evidence	Dandenong South, AustraliaHQ checked Sep 30, 2026	201-500	147 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
20	GLAVA	Indirect evidence	Oslo, NorwayHQ checked Sep 30, 2026	201-500	145 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
21	Johns Manville Industrial Insulation	Strong evidence	Denver, CO, United StatesHQ checked Sep 30, 2026	201-500	141 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
22	ODE Yalıtım	Indirect evidence	Istanbul, TürkiyeHQ checked Sep 30, 2026	201-500	140 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
23	Metl-Span	Indirect evidence	Lewisville, TX, United StatesHQ checked Sep 30, 2026	201-500	135 contacts →
	Indirect evidence “Metl-Span is a dynamic industry innovator dedicated to manufacturing and marketing the highest quality insulated building panel products.” Source: RevenueBase Database · checked Sep 30, 2026
24	K-Flex USA	Partial evidence	Youngsville, NC, United StatesHQ checked Sep 30, 2026	201-500	133 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
25	General Plastics Mfg. CO	Indirect evidence	Tacoma, WA, United StatesHQ checked Sep 30, 2026	51-200	128 contacts →
	Indirect evidence “General Plastics Manufacturing Company - Where Great Ideas Take Shape - has been a leading innovator in the plastics industry for over 80 years.” 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: polyisocyanurate 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 polyisocyanurate insulation manufacturers.
Partial evidence: Its own public description names part of polyisocyanurate insulation manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name polyisocyanurate 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 2,158 polyisocyanurate insulation manufacturers worldwide

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Polyisocyanurate insulation manufacturers worldwide at a glance

As of Sep 30, 2026

29.0%Verified-email coverage

13.8Average contacts per company

11-50Median size (employees)

1.2%Largest-city concentration · Istanbul

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

788

11-50

756

51-200

349

201-500

172

501-1,000

1,001-5,000

5,001-10,000

10001+

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 polyisocyanurate 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 polyisocyanurate insulation manufacturers are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “polyisocyanurate 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 polyisocyanurate 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 polyisocyanurate 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, 8,617 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.

Polyisocyanurate insulation manufacturers by location

13 lists · largest first

Every Polyisocyanurate 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 polyisocyanurate 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 polyisocyanurate insulation manufacturers are there worldwide?

RevenueBase identified 2,158 polyisocyanurate 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?

Knauf Insulation, headquartered in Vise, tops this list with the largest team on record.

Which country has the most polyisocyanurate insulation manufacturers?

The United States leads with 392 companies, followed by Türkiye (118) and the United Kingdom (103). Every polyisocyanurate insulation manufacturers list by country and city is linked on this page.

Which city has the most polyisocyanurate insulation manufacturers?

Istanbul leads with 26 headquartered companies, followed by Auckland (10) and London (10).

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 8,617 verified decision-maker contacts tracked across these 2,158 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.