Canadian building code question

What are the building code requirements for fire-rated doors in Canada?

Fire-rated doors are required wherever a door opening penetrates a required fire separation, and the rating, hardware, and labelling rules depend on the fire-resistance rating of that separation, the occupancy, and whether the door is in an exit or a suite demising wall.

Getting the fire-rated door requirement right means more than picking a rating. The closer, the positive latching, the labelling, the glazing limits, and the hold-open device rules all change depending on the separation the door sits in and what the door protects. Missing any one of these can hold up an inspection or trigger a deficiency on a nearly complete project.

What to check first

  • A fire-rated door is required wherever an opening penetrates a required fire separation — the door rating is usually three-quarters of the separation rating, but exceptions exist.
  • Closers, positive latching, and labelling are mandatory for most fire-rated door assemblies, with specific rules for hold-open devices and electromagnetic releases.
  • Provincial adoption can change glazing limits, vision panel allowances, and hardware details — always confirm the local edition before specifying.

Jurisdiction notes

National baseline

The NBC sets the default relationship between fire separation ratings and the required door ratings, plus closer, latch, and labelling requirements.

Provincial adoption check

Provinces may amend glazing area limits, hold-open device rules, or labelling requirements — verify the local building code edition in force.

Project-specific variables

Exit doors, suite doors, corridor doors, and service room doors can each trigger different hardware and rating requirements even within the same building.

Work through it in this order

  1. Identify every required fire separation the door penetrates and note its fire-resistance rating.
  2. Determine the required door rating (typically three-quarters of the separation rating) and check for exceptions.
  3. Confirm closer, positive-latching, hold-open, and labelling requirements for each door location.
  4. Verify glazing and vision panel limits under the applicable provincial code edition.
  5. Document the specific referenced sections for permit submission or inspection coordination.

Common questions

Is the fire-rated door rating always three-quarters of the fire separation rating?

In most cases yes, but the NBC includes exceptions and specific tables that can change the required door rating depending on the separation context and occupancy.

Do all fire-rated doors need a closer and positive latch?

Nearly all do under the NBC. The rules around hold-open devices and electromagnetic releases add conditions, but the baseline expectation is a self-closing, positive-latching assembly.

Can I use wired glass in a fire-rated door?

Wired glass has size and impact-safety limitations. Many projects now use ceramic or tempered fire-rated glazing, but the allowable area depends on the separation rating and provincial adoption.