Company lists · Data refreshed September 2026

Top 25 Insulation and air sealing companies based in Canada

Name: Insulation and air sealing companies based in Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 388 companies tracked

RevenueBase identified 388 insulation and air sealing companies headquartered in Canada as of September 2026 and tracks 2,313 professional contacts across them, including 682 with verified work emails. Calgary is the largest hub.

This list covers insulation and air sealing companies headquartered in Canada, 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 20, 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 20, 2026 86% judged on-target in blind review

388Companies

2,313Contacts tracked

682Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest insulation and air sealing companies based in Canada

Ranked by team size

Top 25 of 388 insulation and air sealing companies based in Canada, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to insulation and air sealing companies: 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	Thermal Systems	Partial evidence	Rocky View County, AB, CanadaHQ checked Sep 20, 2026	201-500	173 contacts →
	Partial evidence “Thermal Systems is a building envelope, mechanical insulation, roofing and daylighting subcontractor.” Source: RevenueBase Database · checked Sep 20, 2026
2	Great Northern Insulation	Partial evidence	Woodstock, ON, CanadaHQ checked Sep 20, 2026	201-500	127 contacts →
	Partial evidence “Founded in 1980, Great Northern Insulation is Ontario's leading building envelope service provider, for the new construction and retrofit markets across commercial, institutional…” Source: RevenueBase Database · checked Sep 20, 2026
3	Thermo Design Insulation LTD	Partial evidence	Edmonton, AB, CanadaHQ checked Sep 20, 2026	201-500	86 contacts →
	Partial evidence “Over Forty Years of Tradition & Excellence Since 1981, Thermo Design Insulation (TDI) has been providing insulated metal panel solutions to various construction markets across…” Source: RevenueBase Database · checked Sep 20, 2026
4	Nudura Insulated Concrete Forms	Indirect evidence	Barrie, CanadaHQ checked Sep 20, 2026	51-200	66 contacts →
	Indirect evidence “We are committed to providing innovative products and unprecedented service to our distributors, clients, and associates.” Source: RevenueBase Database · checked Sep 20, 2026
5	Dörken Systems INC	Partial evidence	Beamsville, ON, CanadaHQ checked Sep 20, 2026	51-200	57 contacts →
	Partial evidence “After 125 years in over 60 countries, our DELTA® brand is known for delivering innovative, high-performance air- and moisture-barriers for commercial and residential construction.” Source: RevenueBase Database · checked Sep 20, 2026
6	Elastochem	Partial evidence	Brantford, ON, CanadaHQ checked Sep 20, 2026	51-200	48 contacts →
	Partial evidence “Elastochem is a Canadian leader of building enclosure solutions, ranging from waterproofing and restoration systems to polyurethane foam insulation.” Source: RevenueBase Database · checked Sep 20, 2026
7	Airfoam Industries LTD	Indirect evidence	Surrey, BC, CanadaHQ checked Sep 20, 2026	51-200	46 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
8	Owens Corning Canada	Partial evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	n/a	42 contacts →
	Partial evidence “If you’re looking for smart, energy-saving insulation solutions, you've come to the right place.” Source: RevenueBase Database · checked Sep 20, 2026
9	Tetrad	Partial evidence	Sherwood Park, AB, CanadaHQ checked Sep 20, 2026	51-200	34 contacts →
	Partial evidence “Established in 2014, Tetrad Insulation Services is a full-scale insulation contractor serving Canada’s industrial market.” Source: RevenueBase Database · checked Sep 20, 2026
10	Guildfords	Partial evidence	Dartmouth, NS, CanadaHQ checked Sep 20, 2026	51-200	29 contacts →
	Partial evidence “Guildfords was founded in 1906 focusing on insulation services and is North America’s oldest insulation contracting company.” Source: RevenueBase Database · checked Sep 20, 2026
11	Yvon Building Supply	Partial evidence	Burlington, ON, CanadaHQ checked Sep 20, 2026	51-200	27 contacts →
	Partial evidence “Yvon Insulation has more than 40 years of experience installing a variety of insulation products in both residential and commercial environments.” Source: RevenueBase Database · checked Sep 20, 2026
12	Aarc-West Mechanical Insulation	Partial evidence	Langley, BC, CanadaHQ checked Sep 20, 2026	51-200	26 contacts →
	Partial evidence “Aarc-West Mechanical Insulation was founded in November 1994.” Source: RevenueBase Database · checked Sep 20, 2026
13	Northern Caulking INC	Indirect evidence	Mississauga, ON, CanadaHQ checked Sep 20, 2026	51-200	25 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
14	Aries Contracting Ottawa INC	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 20, 2026	11-50	24 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
15	Ideal Insulation & Roofing	Partial evidence	Calgary, CanadaHQ checked Sep 20, 2026	11-50	24 contacts →
	Partial evidence “IDEAL Insulation & Roofing is a 2nd generation family run contracting business and a leader among Calgary insulation companies.” Source: RevenueBase Database · checked Sep 20, 2026
16	AMC Foam Technologies INC	Indirect evidence	Headingley, MB, CanadaHQ checked Sep 20, 2026	51-200	22 contacts →
	Indirect evidence “AMC is a Manitoba owned and operated family business, which was founded in 1995 by the late Tom Smerchanski.” Source: RevenueBase Database · checked Sep 20, 2026
17	Isolation Algon 2000	Indirect evidence	Laval, QC, CanadaHQ checked Sep 20, 2026	51-200	21 contacts →
	Indirect evidence “Isolation Algon Inc est une entreprise familiale possédant plus de 40 années d'expérience dans le domaine de la Construction.” Source: RevenueBase Database · checked Sep 20, 2026
18	O'reilly Brothers LTD	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 20, 2026	11-50	20 contacts →
	Partial evidence “O'Reilly Brothers is the industry-leading insulation contractor in Eastern Ontario, specializing in sprayed polyurethane foam insulation, blown cellulose insulation, vermiculite…” Source: RevenueBase Database · checked Sep 20, 2026
19	Ener-Spray Group Of Companies	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 20, 2026	51-200	19 contacts →
	Indirect evidence “Ener-Spray Group of Companies has offices in Calgary and Vancouver.” Source: RevenueBase Database · checked Sep 20, 2026
20	Greenstone Building Products	Partial evidence	Brandon, MB, CanadaHQ checked Sep 20, 2026	51-200	18 contacts →
	Partial evidence “Greenstone Building Products proudly manufactures the Greenstone Panel, a fully integrated building solution that combines framing, insulation, vapor barrier, and structural…” Source: RevenueBase Database · checked Sep 20, 2026
21	Multi-Glass Insulation	Partial evidence	Brampton, ON, CanadaHQ checked Sep 20, 2026	51-200	18 contacts →
	Partial evidence “For over 40 years, Multi-Glass Insulation has been recognized as a leader in the distribution of superior quality commercial, industrial, institutional and value-added fabricated…” Source: RevenueBase Database · checked Sep 20, 2026
22	Donalco INC	Indirect evidence	Scarborough, ON, CanadaHQ checked Sep 20, 2026	51-200	18 contacts →
	Indirect evidence “We are at your service since 1960 with a robust infrastructure that can provide solutions to your projects for fireproofing (including intumescent) application, and firestopping…” Source: RevenueBase Database · checked Sep 20, 2026
23	Beyond Group	Partial evidence	Calgary, AB, CanadaHQ checked Sep 20, 2026	51-200	18 contacts →
	Partial evidence “We are an established Calgary Insulation contractor.” Source: RevenueBase Database · checked Sep 20, 2026
24	Nadeau Insulation	Partial evidence	Québec, QC, CanadaHQ checked Sep 20, 2026	51-200	18 contacts →
	Partial evidence “NADEAU is the largest distributor/fabricator of insulation in Quebec servicing markets as Commercial, Industrial, OEM and marine.” Source: RevenueBase Database · checked Sep 20, 2026
25	Isolation Confort C.O	Indirect evidence	Terrebonne, QC, CanadaHQ checked Sep 20, 2026	51-200	18 contacts →
	Indirect evidence “L'isolation et l’étanchéité résidentielle et commerciale depuis 1979 Commercial & Résidentiel Nous sommes spécialisés en isolation de bâtiment, du sous-sol au grenier, mais aussi…” Source: RevenueBase Database · checked Sep 20, 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 and air sealing companies. 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 and air sealing companies.
Partial evidence: Its own public description names part of insulation and air sealing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name insulation and air sealing companies. 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 388 insulation and air sealing companies based in Canada

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 682 reachable decision-makers.

Free signup · no credit card

View the full list →

Insulation and air sealing companies based in Canada at a glance

As of Sep 20, 2026

29.5%Verified-email coverage

6.0Average contacts per company

1-10Median size (employees)

5.9%Largest-city concentration · Calgary

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

198

11-50

112

51-200

201-500

10001+

Email recency for this list is measured worldwide rather than for Canada, so it is reported there. Company counts and contact totals on this page are exact for Canada, over 388 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 and air sealing companies, 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 Canada whose own description of what they do matches “insulation and air sealing companies”. 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 and air sealing companies), 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 and air sealing companies, and records with no verified work email. Companies headquartered outside Canada 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, 682 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 20, 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 insulation and air sealing companies, 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 and air sealing companies are there based in Canada?

RevenueBase identified 388 insulation and air sealing companies headquartered in Canada 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?

Thermal Systems, headquartered in Canada, tops this list with the largest team on record.

Which city has the most insulation and air sealing companies?

Calgary leads with 23 headquartered companies, followed by Edmonton (19) and Toronto (17).

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 682 verified decision-maker contacts tracked across these 388 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 20, 2026.

Ready to reach these companies? Verified emails and direct dials for all 388 insulation and air sealing companies based in Canada. Start with a free account, no credit card.

Download this list →

Related lists

Insulation and air sealing companies by geography

Browse the directory

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.