Company lists · Data refreshed September 2026

Top 25 Glass sealing and weatherproofing services based in Canada

RevenueBase identified 192 glass sealing and weatherproofing services headquartered in Canada as of September 2026 and tracks 688 professional contacts across them, including 170 with verified work emails. Surrey is the largest hub.

This list covers glass sealing and weatherproofing services 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 28, 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 28, 2026 86% judged on-target in blind review
192Companies
688Contacts tracked
170Verified emails
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The 25 largest glass sealing and weatherproofing services based in Canada

Ranked by team size
Top 25 of 192 glass sealing and weatherproofing services based in Canada, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to glass sealing and weatherproofing services: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceRocky View County, AB, CanadaHQ checked Sep 28, 202651-20063 contacts →

Partial evidence

“DESA Glass is a premier facade contractor shaping the built environment across Western Canada.”

Source: RevenueBase Database · checked Sep 28, 2026
2Partial evidenceEtobicoke, ON, CanadaHQ checked Sep 28, 202651-20042 contacts →

Partial evidence

“E1 Doors Glass Metal – The Special Forces of Glazing E1 is a full-spectrum glazing company specializing in service, engineered solutions, and complex architectural glazing.”

Source: RevenueBase Database · checked Sep 28, 2026
3Indirect evidenceMississauga, ON, CanadaHQ checked Sep 28, 202651-20025 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
4Partial evidenceCalgary, AB, CanadaHQ checked Sep 28, 202651-20023 contacts →

Partial evidence

“Alberta Glass is a commercial glazing contractor focused on providing excellent aesthetics, performance and energy efficient building envelope solutions for building owners and…”

Source: RevenueBase Database · checked Sep 28, 2026
5Partial evidenceLondon, ON, CanadaHQ checked Sep 28, 202611-5018 contacts →

Partial evidence

“Eco Architectural Glass Inc is a company based out of 1994 Mallard Rd, London, Ontario, Canada.”

Source: RevenueBase Database · checked Sep 28, 2026
6Indirect evidenceTerrebonne, QC, CanadaHQ checked Sep 28, 202651-20018 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 28, 2026
7Indirect evidenceLaval, QC, CanadaHQ checked Sep 28, 202651-20015 contacts →

Indirect evidence

“Expert en Enveloppe du Bâtiment depuis Trois Générations.Mongrain (spécialiste en isolation) sert ses clients depuis près de 60 ans.”

Source: RevenueBase Database · checked Sep 28, 2026
8Partial evidenceLondon, ON, CanadaHQ checked Sep 28, 202611-5014 contacts →

Partial evidence

“Thames Glass Limited has been providing innovative glass and glazing solutions to the Southwestern Ontario market since 1966.”

Source: RevenueBase Database · checked Sep 28, 2026
9Indirect evidenceMontreal, QC, CanadaHQ checked Sep 28, 202651-20013 contacts →

Indirect evidence

“S8 Vitrerie Architecturale Inc.”

Source: RevenueBase Database · checked Sep 28, 2026
10Partial evidenceVaughan, ON, CanadaHQ checked Sep 28, 202611-5012 contacts →

Partial evidence

“As a Custom Architectural Glass Fabricator, we work with companies who install glass professionally.”

Source: RevenueBase Database · checked Sep 28, 2026
11Indirect evidenceCoquitlam, BC, CanadaHQ checked Sep 28, 202611-509 contacts →

Indirect evidence

“We are specializing in project management, commercial glazing, residential glazing, and all other aspects of envelope application supply and installation.”

Source: RevenueBase Database · checked Sep 28, 2026
12Indirect evidenceVaughan, ON, CanadaHQ checked Sep 28, 2026201-5008 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
13Indirect evidenceToronto, ON, CanadaHQ checked Sep 28, 202611-508 contacts →

Indirect evidence

“Fenzi North America is a subsidiary of the Fenzi Group, an Italian privately-owned sealant and paint manufacturer.”

Source: RevenueBase Database · checked Sep 28, 2026
14Indirect evidenceAnjou, QC, CanadaHQ checked Sep 28, 20261-108 contacts →

Indirect evidence

“Valtec est une entreprise qui oeuvre dans la distribution de produits de construction.”

Source: RevenueBase Database · checked Sep 28, 2026
15Partial evidenceLondon, ON, CanadaHQ checked Sep 28, 202611-507 contacts →

Partial evidence

“Based in London Ontario since 1983, Provincial Glass & Mirror Ltd has been providing glazing services across Southwestern Ontario ranging as far as Windsor, Sarnia…”

Source: RevenueBase Database · checked Sep 28, 2026
16Partial evidenceToronto, ON, CanadaHQ checked Sep 28, 202611-507 contacts →

Partial evidence

“BOS Glass Inc.”

Source: RevenueBase Database · checked Sep 28, 2026
17Indirect evidenceQuébec, QC, CanadaHQ checked Sep 28, 202651-2007 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 28, 2026
18Indirect evidenceBurlington, ON, CanadaHQ checked Sep 28, 202611-507 contacts →

Indirect evidence

“After 60 years, Beverly Caulking has grown from a small, regional caulking company to one of Canada's most recongnized caulking and firestop contractors.”

Source: RevenueBase Database · checked Sep 28, 2026
19Indirect evidenceCambridge, ON, CanadaHQ checked Sep 28, 20261-107 contacts →

Indirect evidence

“Air Leakage & Ventilation in new and existing homes is the #1 source of Heat Loss.”

Source: RevenueBase Database · checked Sep 28, 2026
20Indirect evidenceGatineau, QC, CanadaHQ checked Sep 28, 202611-506 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
21Indirect evidenceToronto, ON, CanadaHQ checked Sep 28, 202611-506 contacts →

Indirect evidence

“Roofing - Waterproofing - Architectural Cladding (647) 330-0392 estimating@iteckroofing.ca”

Source: RevenueBase Database · checked Sep 28, 2026
22Indirect evidencePointe-claire, QC, CanadaHQ checked Sep 28, 202611-506 contacts →

Indirect evidence

“Nous sommes une entreprise spécialisée en scellement de conduits de ventilation et d'enveloppe de bâtiment commerciale, industrielle et institutionnelle.”

Source: RevenueBase Database · checked Sep 28, 2026
23Indirect evidenceLachine, QC, CanadaHQ checked Sep 28, 202611-506 contacts →

Indirect evidence

“Plus de 45 années d’expérience dans la vitrerie, la fenestration, les murs rideaux, les entrées, les panneaux d’aluminiums et les lanterneaux.”

Source: RevenueBase Database · checked Sep 28, 2026
24Indirect evidenceKamloops, BC, CanadaHQ checked Sep 28, 20261-105 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
25Indirect evidenceLachine, QC, CanadaHQ checked Sep 28, 202611-505 contacts →

Indirect evidence

“Vitrerie RD est une entreprise de solution dans le domaine de la vitrerie commercial,industrielle et institutionnel qui sert les gestionnaires de projet et d'immeubles dans le but…”

Source: RevenueBase Database · checked Sep 28, 2026

Showing 25 of 192 glass sealing and weatherproofing services based in Canada

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Glass sealing and weatherproofing services based in Canada at a glance

As of Sep 28, 2026
24.7%Verified-email coverage
3.6Average contacts per company
1-10Median size (employees)
5.7%Largest-city concentration · Surrey
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
114
11-50
54
51-200
9
201-500
1
501-1,000
1

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 192 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 glass sealing and weatherproofing services, 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 “glass sealing and weatherproofing services”. 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 glass sealing and weatherproofing services), 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 glass sealing and weatherproofing services, 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, 170 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 28, 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 glass sealing and weatherproofing services, 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 glass sealing and weatherproofing services are there based in Canada?

RevenueBase identified 192 glass sealing and weatherproofing services 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?

Desa Glass, headquartered in Rocky View County, tops this list with the largest team on record.

Which city has the most glass sealing and weatherproofing services?

Surrey leads with 11 headquartered companies, followed by Toronto (10) and Vancouver (9).

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 170 verified decision-maker contacts tracked across these 192 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 28, 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.