Company lists · Data refreshed September 2026

Top 25 Attic insulation companies based in Canada

Name: Attic insulation companies based in Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 144 companies tracked

RevenueBase identified 144 attic insulation companies headquartered in Canada as of September 2026 and tracks 607 professional contacts across them, including 125 with verified work emails. Calgary is the largest hub.

This list covers attic insulation 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 19, 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 19, 2026 86% judged on-target in blind review

144Companies

607Contacts tracked

125Verified emails

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The 25 largest attic insulation companies based in Canada

Ranked by team size

Top 25 of 144 attic insulation companies based in Canada, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to attic insulation 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	Owens Corning Canada	Partial evidence	Toronto, ON, CanadaHQ checked Sep 19, 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 19, 2026
2	Tetrad	Partial evidence	Sherwood Park, AB, CanadaHQ checked Sep 19, 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 19, 2026
3	Yvon Building Supply	Partial evidence	Burlington, ON, CanadaHQ checked Sep 19, 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 19, 2026
4	Ideal Insulation & Roofing	Partial evidence	Calgary, CanadaHQ checked Sep 19, 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 19, 2026
5	O'reilly Brothers LTD	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 19, 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 19, 2026
6	Beyond Group	Partial evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	51-200	18 contacts →
	Partial evidence “We are an established Calgary Insulation contractor.” Source: RevenueBase Database · checked Sep 19, 2026
7	Solution Isolation	Partial evidence	Beloeil, QC, CanadaHQ checked Sep 19, 2026	11-50	17 contacts →
	Partial evidence “About us At Solution Isolation, we pride ourselves on providing exceptional insulation solutions to homeowners across Québec As a company dedicated to energy efficiency and…” Source: RevenueBase Database · checked Sep 19, 2026
8	Isolation Majeau ET Frère INC	Indirect evidence	Saint-esprit, QC, CanadaHQ checked Sep 19, 2026	11-50	14 contacts →
	Indirect evidence “Isolation Majeau et frère est un entrepreneur spécialisé en isolation thermique de bâtiment résidentiel, commercial et agricole depuis 1992.” Source: RevenueBase Database · checked Sep 19, 2026
9	MJM Energy	Indirect evidence	Dartmouth, NS, CanadaHQ checked Sep 19, 2026	11-50	14 contacts →
	Indirect evidence “As Building Performance Contractors we specialize in services that cover all aspects of improving your home’s performance and energy efficiency.” Source: RevenueBase Database · checked Sep 19, 2026
10	Standard Insulation Siding Drywall	Partial evidence	Surrey, BC, CanadaHQ checked Sep 19, 2026	201-500	12 contacts →
	Partial evidence “Standard Insulation and Siding is one of the oldest and largest insulation & siding companies in the Lower Mainland, proudly serving the industry since 1989.” Source: RevenueBase Database · checked Sep 19, 2026
11	Aw-Nrg Insulation Services	Partial evidence	Airdrie, AB, CanadaHQ checked Sep 19, 2026	51-200	12 contacts →
	Partial evidence “AW-NRG Insulation Services, Inc.” Source: RevenueBase Database · checked Sep 19, 2026
12	Insul Fibre LTD	Indirect evidence	Saskatoon, SK, CanadaHQ checked Sep 19, 2026	11-50	11 contacts →
	Indirect evidence “Insul Fibre was founded in 1965 by Pasquale (Pat) Mastromatteo, a first generation Italian-Canadian.” Source: RevenueBase Database · checked Sep 19, 2026
13	Isolation Multi-Services	Indirect evidence	Laval, QC, CanadaHQ checked Sep 19, 2026	11-50	11 contacts →
	Indirect evidence “Chef de file dans le domaine de l'isolation, Isolation Multi-Services s'efforce d'offrir un excellent service à prix concurrentiel.” Source: RevenueBase Database · checked Sep 19, 2026
14	Igloo Cellulose INC	Indirect evidence	Dorval, QC, CanadaHQ checked Sep 19, 2026	11-50	10 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
15	Thermo Homes Insulators LTD	Partial evidence	Mount Uniacke, NS, CanadaHQ checked Sep 19, 2026	11-50	10 contacts →
	Partial evidence “Thermo Homes Insulators is a Nova Scotia business providing insulation services to homeowners, home builders and commercial contractors throughout the Atlantic Provinces.” Source: RevenueBase Database · checked Sep 19, 2026
16	Westcal Insulation	Partial evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	51-200	8 contacts →
	Partial evidence “Westcal Insulation Ltd.” Source: RevenueBase Database · checked Sep 19, 2026
17	Isolation Air-Plus INC	Indirect evidence	Québec, QC, CanadaHQ checked Sep 19, 2026	51-200	7 contacts →
	Indirect evidence “Depuis 1976, Isolation Air-Plus offre des services d'isolation, d'insonorisation, d’ignifugation et d’étanchéisation dans les secteurs résidentiel, commercial et industriel.” Source: RevenueBase Database · checked Sep 19, 2026
18	Isolation Moderne DE LA Capitale 2016 INC	Indirect evidence	Québec, QC, CanadaHQ checked Sep 19, 2026	11-50	7 contacts →
	Indirect evidence “Isolation Moderne de la Capitale (2016) inc.” Source: RevenueBase Database · checked Sep 19, 2026
19	Isolation 4 Saisons INC	Indirect evidence	Repentigny, QC, CanadaHQ checked Sep 19, 2026	11-50	7 contacts →
	Indirect evidence “Isolation 4 Saisons \| Votre partenaire en isolation au Québec Depuis près de 30 ans, Isolation 4 Saisons accompagne les entrepreneurs généraux, promoteurs, professionnels de la…” Source: RevenueBase Database · checked Sep 19, 2026
20	Furoy's Insulation	Partial evidence	Val Caron, ON, CanadaHQ checked Sep 19, 2026	11-50	7 contacts →
	Partial evidence “We are a customer-oriented company, offering competent and cost-effective solutions for all of your insulation needs.” Source: RevenueBase Database · checked Sep 19, 2026
21	Reid's Roofing & Insulation LTD	Partial evidence	St.albert, AB, CanadaHQ checked Sep 19, 2026	11-50	5 contacts →
	Partial evidence “Reid’s Roofing and Insulation has served residential and commercial customers in the Edmonton region for the past 16 years.” Source: RevenueBase Database · checked Sep 19, 2026
22	PRO Insulation Contracting	Partial evidence	Markham, ON, CanadaHQ checked Sep 19, 2026	11-50	5 contacts →
	Partial evidence “Pro Insulation Contracting serves as a leading contractor in Toronto and GTA.” Source: RevenueBase Database · checked Sep 19, 2026
23	Empire Insulation	Partial evidence	Red Deer, AB, CanadaHQ checked Sep 19, 2026	1-10	5 contacts →
	Partial evidence “We strive to constantly improve lives and improve the environment through energy efficient and energy saving building insulation solutions.” Source: RevenueBase Database · checked Sep 19, 2026
24	A1 Isolation	Indirect evidence	Varennes, QC, CanadaHQ checked Sep 19, 2026	11-50	5 contacts →
	Indirect evidence “Notre entreprise s’est bâti une solide réputation dans le marché québécois de l’isolation thermique et l’insonorisation des constructions résidentielles, commerciales et…” Source: RevenueBase Database · checked Sep 19, 2026
25	Reitzel Insulation	Indirect evidence	Waterloo, ON, CanadaHQ checked Sep 19, 2026	11-50	5 contacts →
	Indirect evidence “Experience counts, and we have expertise gained from completing over a hundred thousand projects.” Source: RevenueBase Database · checked Sep 19, 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: attic insulation 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 attic insulation companies.
Partial evidence: Its own public description names part of attic insulation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name attic insulation 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 144 attic insulation companies based in Canada

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Attic insulation companies based in Canada at a glance

As of Sep 19, 2026

20.6%Verified-email coverage

4.2Average contacts per company

1-10Median size (employees)

4.2%Largest-city concentration · Calgary

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

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 144 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 attic insulation 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 “attic insulation 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 attic insulation 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 attic insulation 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, 125 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 19, 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 attic insulation 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 attic insulation companies are there based in Canada?

RevenueBase identified 144 attic insulation 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?

Owens Corning Canada, headquartered in Toronto, tops this list with the largest team on record.

Which city has the most attic insulation companies?

Calgary leads with 6 headquartered companies, followed by Kelowna (5) and North York (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 125 verified decision-maker contacts tracked across these 144 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 19, 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.