Company lists · Data refreshed September 2026

Top 25 Insulation contractors based in the United States

Name: Insulation contractors based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 4,832 companies tracked

RevenueBase identified 4,832 insulation contractors headquartered in the United States as of September 2026 and tracks 58,111 professional contacts across them, including 15,424 with verified work emails. Houston is the largest hub.

This list covers insulation contractors 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 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

4,832Companies

58,111Contacts tracked

15,424Verified emails

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The 25 largest insulation contractors based in the United States

Ranked by team size

Top 25 of 4,832 insulation contractors based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to insulation contractors: 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	Truteam	Partial evidence	Daytona Beach, FL, United StatesHQ checked Sep 17, 2026	10001+	1,561 contacts →
	Partial evidence “TruTeam is the nation’s largest insulation installer and we also install fireplaces, gutters, garage doors and more.” Source: RevenueBase Database · checked Sep 17, 2026
2	Topbuild	Indirect evidence	Daytona Beach, FL, United StatesHQ checked Sep 17, 2026	n/a	692 contacts →
	Indirect evidence “TopBuild is now QXO.” Source: RevenueBase Database · checked Sep 17, 2026
3	Prism Electric	Indirect evidence	Garland, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	687 contacts →
	Indirect evidence “Our story began in 1994 with a simple vision: Build a company that does things right.” Source: RevenueBase Database · checked Sep 17, 2026
4	SPI	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 17, 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 17, 2026
5	Distribution International	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 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 17, 2026
6	Inglett & Stubbs	Indirect evidence	Mableton, GA, United StatesHQ checked Sep 17, 2026	501-1,000	459 contacts →
	Indirect evidence “Inglett & Stubbs LLC is a recognized leader in the electrical construction industry today.” Source: RevenueBase Database · checked Sep 17, 2026
7	Service Partners	Indirect evidence	Daytona Beach, FL, United StatesHQ checked Sep 17, 2026	501-1,000	459 contacts →
	Indirect evidence “Service Partners is a nationwide distributor of building supplies used in the construction industry.” Source: RevenueBase Database · checked Sep 17, 2026
8	ACE Electric, INC	Partial evidence	Valdosta, GA, United StatesHQ checked Sep 17, 2026	1,001-5,000	455 contacts →
	Partial evidence “Ace Electric is a family-owned/operated electrical contractor performing safe and high-quality work for clients throughout the United States.” Source: RevenueBase Database · checked Sep 17, 2026
9	KPS Global LLC	Indirect evidence	Fort Worth, TX, United StatesHQ checked Sep 17, 2026	501-1,000	419 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
10	Excel Modular Scaffold	Indirect evidence	Baton Rouge, LA, United StatesHQ checked Sep 17, 2026	1,001-5,000	403 contacts →
	Indirect evidence “Meeting industry’s soft-craft demands is what makes Excel a true leader.” Source: RevenueBase Database · checked Sep 17, 2026
11	STO Corp	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 17, 2026	51-200	396 contacts →
	Indirect evidence “Sto is an international technology leader in the design and production of innovative building materials tailored to human needs.” Source: RevenueBase Database · checked Sep 17, 2026
12	Strada Services	Indirect evidence	Sanford, FL, United StatesHQ checked Sep 17, 2026	1,001-5,000	391 contacts →
	Indirect evidence “Strada Services is a full service electrical, security, and air conditioning contracting company servicing residential, commercial, and industrial customers in Florida and in the…” Source: RevenueBase Database · checked Sep 17, 2026
13	Homeworks Energy, INC	Indirect evidence	Medford, MA, United StatesHQ checked Sep 17, 2026	201-500	356 contacts →
	Indirect evidence “At HomeWorks Energy, our mission is simple, literally: Energy Efficiency, Simplified.” Source: RevenueBase Database · checked Sep 17, 2026
14	Kingspan Insulated Panels North America	Indirect evidence	Deland, FL, United StatesHQ checked Sep 17, 2026	1,001-5,000	348 contacts →
	Indirect 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 17, 2026
15	General Insulation Company, INC	Indirect evidence	Medford, MA, United StatesHQ checked Sep 17, 2026	501-1,000	342 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
16	Alpha Insulation & Waterproofing	Partial evidence	Marietta, GA, United StatesHQ checked Sep 17, 2026	501-1,000	335 contacts →
	Partial evidence “With over a quarter-century of experience in commercial insulation, waterproofing, spray fireproofing, spray foam insulation, and restoration, Alpha has served as the benchmark…” Source: RevenueBase Database · checked Sep 17, 2026
17	Marshall's Specialty Services LLC	Partial evidence	Springfield, OR, United StatesHQ checked Sep 17, 2026	51-200	319 contacts →
	Partial evidence “Marshall’s Specialty Services LLC is a Heating, Air Conditioning, Insulation, and Fireplaces service provider; with tens of thousands of satisfied customers all across Lane…” Source: RevenueBase Database · checked Sep 17, 2026
18	31-W Insulation	Partial evidence	Goodlettsville, TN, United StatesHQ checked Sep 17, 2026	501-1,000	288 contacts →
	Partial evidence “Installation of Insulation, Garage Doors and Operators, Shelving, Shower Doors, Door and Bath Hardware, Mirrors, Blinds, Electric Fireplaces, Spray Foam Insulation: Open and…” Source: RevenueBase Database · checked Sep 17, 2026
19	Macarthur CO	Indirect evidence	Saint Paul, MN, United StatesHQ checked Sep 17, 2026	501-1,000	278 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
20	Brace Integrated Services	Strong evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	501-1,000	263 contacts →
	Strong evidence “BRACE Integrated Services, a BRACE Industrial Group company, is a nationwide specialty contractor and turn-key supplier of scaffolding, insulation, fireproofing, heat tracing…” Source: RevenueBase Database · checked Sep 17, 2026
21	Staff Electric Co. INC	Indirect evidence	Po Box 917 Butler, WI, United StatesHQ checked Sep 17, 2026	201-500	248 contacts →
	Indirect evidence “Charlie Staff started his electrical career at the turn of the 20th century, installing residential phone lines and wet doorbells in the City of Milwaukee.” Source: RevenueBase Database · checked Sep 17, 2026
22	JT Thorpe	Indirect evidence	Richmond, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	234 contacts →
	Indirect evidence “For more than a century, JT Thorpe has been a trusted name in the industry, consistently delivering exceptional industrial services.” Source: RevenueBase Database · checked Sep 17, 2026
23	Homans Associates	Partial evidence	Wilmington, MA, United StatesHQ checked Sep 17, 2026	201-500	233 contacts →
	Partial evidence “Homans Associates is the premier distributor of HVAC Equipment, Supplies and Mechanical Insulation products in the Northeast.” Source: RevenueBase Database · checked Sep 17, 2026
24	Reliable Heating & AIR	Indirect evidence	Kennesaw, GA, United StatesHQ checked Sep 17, 2026	201-500	231 contacts →
	Indirect evidence “Since 1978, Reliable Heating & Air has been serving all of Metro Atlanta's communities offering heating, cooling, plumbing and electrical services, indoor air quality, duct…” Source: RevenueBase Database · checked Sep 17, 2026
25	I&i Insulations, INC	Partial evidence	Harahan, LA, United StatesHQ checked Sep 17, 2026	1,001-5,000	228 contacts →
	Partial evidence “Founded in New Orleans, LA in 1970, Insulations, Inc.” 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 contractors. 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 contractors.
Partial evidence: Its own public description names part of insulation contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name insulation contractors. 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 4,832 insulation contractors based in the United States

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Insulation contractors based in the United States at a glance

As of Sep 17, 2026

26.5%Verified-email coverage

12.0Average contacts per company

11-50Median size (employees)

1.6%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

2,111

11-50

1,880

51-200

592

201-500

133

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 4,832 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 contractors, 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 “insulation contractors”. 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 contractors), 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 contractors, 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, 15,424 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 contractors by metro

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 contractors, 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 contractors are there based in the United States?

RevenueBase identified 4,832 insulation contractors 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?

Truteam, headquartered in Daytona Beach, tops this list with the largest team on record.

Which city has the most insulation contractors?

Houston leads with 75 headquartered companies, followed by Phoenix (42) and New York (39).

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 15,424 verified decision-maker contacts tracked across these 4,832 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.