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October 2026
Top 5 passive fire protection companies in Canada
Of the 27 passive fire protection companies in Canada listed in the OpenFire directory in October 2026, these profiles were viewed most by people and AI assistants.
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#1
Adler Construction Services
ULC Qualified Firestop Contractor across Western Canada.
Contractor 21–100 people 3 officesFirestopping Structural fire protectionCalgary, Alberta · HQ View company -
#2
Inflector Environmental Services
Ontario fireproofing and firestopping division incorporating Donalco.
Contractor 100+ people 3 officesFirestopping Structural fire protectionOttawa, Ontario · HQ View company -
Joint #3
McGowan Insulation
Hamilton-area UL Solutions Qualified Firestop Contractor since 1972.
Contractor 21–100 people Est. 1972 1 officeFirestopping Structural fire protectionStoney Creek, Ontario View company -
Joint #3
Westcal Canadian Firestop
Calgary firestop installation and inspection, UL Solutions qualified.
Contractor 21–100 people 1 officeCompartment walls & cavity barriers Firestopping PFP survey & inspectionCalgary, Alberta View company -
Joint #5
Global Firestop Services
Nova Scotia firestop and fireproofing contractor.
Contractor 1–5 people 1 officeFirestopping Structural fire protectionDartmouth, Nova Scotia View company -
Joint #5
Pro-Firestop
Dedicated Southern Ontario firestop contractor, UL Solutions qualified.
Contractor 6–20 people 1 officeFirestoppingToronto, Ontario View company
Browse all fire safety companies in Canada →
Companies are ranked by how often their OpenFire directory profile was viewed during the calendar month, by people and by AI assistants. Search-engine crawlers, other automated traffic and link previews are not counted. Companies with equal views share a rank.
A company with offices in several countries, or working across several categories, is ranked in each of them on the same monthly total. A ranking is only published where enough companies are listed and viewed for it to be meaningful.
A ranking reflects interest in a company's listing. It is not an endorsement, and it is not a check of a company's competence, certification or accreditation.