Company lists · Data refreshed September 2026

Top 25 Mechanical insulation manufacturers based in the United States

Name: Mechanical insulation manufacturers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 756 companies tracked

RevenueBase identified 756 mechanical insulation manufacturers headquartered in the United States as of September 2026 and tracks 13,492 professional contacts across them, including 4,295 with verified work emails. Houston is the largest hub.

This list covers mechanical insulation manufacturers headquartered in the United States, 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

756Companies

13,492Contacts tracked

4,295Verified emails

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The 25 largest mechanical insulation manufacturers based in the United States

Ranked by team size

Top 25 of 756 mechanical insulation manufacturers based in the United States, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to mechanical 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	Johns Manville	Strong evidence	Denver, CO, United StatesHQ checked Sep 30, 2026	5,001-10,000	2,811 contacts →
	Strong evidence “At Johns Manville, we build on decades of experience to manufacture commercial roofing, premium-quality insulation and a variety of engineered products for our customers.” Source: RevenueBase Database · checked Sep 30, 2026
2	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
3	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
4	Distribution International	Partial evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	1,001-5,000	488 contacts →
	Partial evidence “Distribution International (DI) a leading distributor of thermal and acoustical insulation and related supplies for maintenance and repair operations in the United States.” Source: RevenueBase Database · checked Sep 30, 2026
5	General Insulation Company, INC	Indirect evidence	Medford, MA, United StatesHQ checked Sep 30, 2026	501-1,000	342 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026
6	Homans Associates	Strong evidence	Wilmington, MA, United StatesHQ checked Sep 30, 2026	201-500	233 contacts →
	Strong evidence “Homans Associates is the premier distributor of HVAC Equipment, Supplies and Mechanical Insulation products in the Northeast.” Source: RevenueBase Database · checked Sep 30, 2026
7	I&i Insulations, INC	Partial evidence	Harahan, LA, United StatesHQ checked Sep 30, 2026	1,001-5,000	228 contacts →
	Partial evidence “Founded in New Orleans, LA in 1970, Insulations, Inc.” Source: RevenueBase Database · checked Sep 30, 2026
8	NUTEC	Strong evidence	Huntersville, NC, United StatesHQ checked Sep 30, 2026	201-500	208 contacts →
	Strong evidence “NUTEC is a leading manufacturer of superior quality, high-temperature insulation and fire protection products.” Source: RevenueBase Database · checked Sep 30, 2026
9	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
10	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
11	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
12	Silvercote	Strong evidence	Greenville, SC, United StatesHQ checked Sep 30, 2026	51-200	120 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
13	Chaparral Company	Strong evidence	Waco, TX, United StatesHQ checked Sep 30, 2026	1,001-5,000	105 contacts →
	Strong evidence “Chaparral Insulation has proudly served the mechanical insulation industry for more than 30 years.” Source: RevenueBase Database · checked Sep 30, 2026
14	Koala Insulation	Indirect evidence	Melbourne, FL, United StatesHQ checked Sep 30, 2026	11-50	98 contacts →
	Indirect evidence “Our mission is to deliver efficiency and improve comfort by addressing customer priorities, with expertise and simplicity, for an ultimately painless process.” Source: RevenueBase Database · checked Sep 30, 2026
15	Owens Corning Foamglas Industrial Insulation	Strong evidence	Toledo, OH, United StatesHQ checked Sep 30, 2026	201-500	98 contacts →
	Strong evidence “FOAMGLAS® insulation is part of Owens Corning, a global building and industrial materials leader with three integrated businesses that are dedicated to the manufacture and…” Source: RevenueBase Database · checked Sep 30, 2026
16	Plymouth Foam, An Altor Company	Partial evidence	Plymouth, WI, United StatesHQ checked Sep 30, 2026	51-200	89 contacts →
	Partial evidence “Altor Solutions® is a dynamic, engineering-driven company whose goal is to design and produce superior products that help customers solve their needs for Packaging, Insulation and…” Source: RevenueBase Database · checked Sep 30, 2026
17	Epsilyte	Partial evidence	The Woodlands, TX, United StatesHQ checked Sep 30, 2026	201-500	87 contacts →
	Partial evidence “Epsilyte is one of North America’s leading producers of advanced insulative materials.” Source: RevenueBase Database · checked Sep 30, 2026
18	Rmax, A Sika Brand	Partial evidence	Lewisville, TX, United StatesHQ checked Sep 30, 2026	5,001-10,000	81 contacts →
	Partial evidence “Since 1978, Rmax has been manufacturing high-quality polyiso insulation products and providing engineered solutions for enhanced energy efficiency.” Source: RevenueBase Database · checked Sep 30, 2026
19	OJ Insulation	Indirect evidence	Azusa, CA, United StatesHQ checked Sep 30, 2026	201-500	74 contacts →
	Indirect evidence “From the start of every project to its completion, we dedicate ourselves to providing you with the superior service that reflects our quality and professionalism.” Source: RevenueBase Database · checked Sep 30, 2026
20	Progressive Foam Technologies, INC	Strong evidence	Beach City, OH, United StatesHQ checked Sep 30, 2026	51-200	69 contacts →
	Strong evidence “Progressive Foam Technologies is a leading manufacturer of foam insulation products for home exterior, interior and foundation applications – and is also the inventor of insulated…” Source: RevenueBase Database · checked Sep 30, 2026
21	Therm-All	Partial evidence	Westlake, OH, United StatesHQ checked Sep 30, 2026	51-200	67 contacts →
	Partial evidence “Therm-All has been at the forefront of metal building insulation solutions since 1981.” Source: RevenueBase Database · checked Sep 30, 2026
22	Bonded Logic, INC	Indirect evidence	Chandler, AZ, United StatesHQ checked Sep 30, 2026	51-200	65 contacts →
	Indirect evidence “With over 35 years of recycling and manufacturing experience, Bonded Logic Inc.” Source: RevenueBase Database · checked Sep 30, 2026
23	Straight Line Industrial Services, INC	Indirect evidence	South Houston, TX, United StatesHQ checked Sep 30, 2026	51-200	64 contacts →
	Indirect evidence “About Us Straight Line Industrial Services, Inc- We are celebrating our 20 th year anniversary, SLIS was Founded: 07-07-2004 SLIS is a Certified Minority Company by the Houston…” Source: RevenueBase Database · checked Sep 30, 2026
24	BAY Insulation Systems	Partial evidence	Green Bay, WI, United StatesHQ checked Sep 30, 2026	201-500	58 contacts →
	Partial evidence “Bay Insulation Systems is the leading supplier of metal building insulation and systems in North America.” Source: RevenueBase Database · checked Sep 30, 2026
25	Insultech LLC	Partial evidence	Santa Ana, CA, United StatesHQ checked Sep 30, 2026	201-500	58 contacts →
	Partial evidence “InsulTech LLC designs and manufactures engineered solutions for the management of thermal and acoustical energy.” 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: mechanical 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 mechanical insulation manufacturers.
Partial evidence: Its own public description names part of mechanical insulation manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name mechanical 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 756 mechanical insulation manufacturers based in the United States

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Mechanical insulation manufacturers based in the United States at a glance

As of Sep 30, 2026

31.8%Verified-email coverage

17.8Average contacts per company

11-50Median size (employees)

2.8%Largest-city concentration · Houston

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

270

11-50

306

51-200

115

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 States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 756 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 mechanical 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 States whose own description of what they do matches “mechanical 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 mechanical 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 mechanical insulation manufacturers, and records with no verified work email. Companies headquartered outside United States 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, 4,295 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.

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 mechanical 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 mechanical insulation manufacturers are there based in the United States?

RevenueBase identified 756 mechanical insulation manufacturers headquartered in the United States 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?

Johns Manville, headquartered in Denver, tops this list with the largest team on record.

Which city has the most mechanical insulation manufacturers?

Houston leads with 21 headquartered companies, followed by Charlotte (7) and Oklahoma City (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 4,295 verified decision-maker contacts tracked across these 756 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.