Canadian building code question

What fire separation is required between suites in Canada?

There is no single national fire-separation rating that applies to every suite condition. The required separation depends first on what kind of suites are being separated and which code path governs them, then on related factors such as occupancy, building configuration, sprinklering, and provincial adoption.

Suite fire separation is one of the most common detailing and coordination questions in Canadian building code work because different suite conditions can follow different code paths. This page frames the research path so you can identify the right suite condition before relying on a fire-resistance rating for drawings or permit response.

What to check first

  • Do not assume one fire-separation rating covers every suite condition. Start by identifying the specific suite condition and governing code path.
  • Dwelling units, hotel suites, care or detention suites, mixed-use suite conditions, and Part 9 secondary-suite scenarios may not follow the same separation rule.
  • Opening protection, continuity, and penetration rules are related checks that can change whether the fire separation is actually compliant as built.

Jurisdiction notes

National baseline

Start with the NBC fire-separation provisions that apply to the specific suite condition, then identify the governing occupancy and building context for that code path.

Province and edition check

Confirm provincial adoption and any amendments that may change the fire-separation path, especially for suite conditions that involve mixed occupancies or different code editions.

Conditions that branch the answer

The suite type, whether the project falls under Part 3 or Part 9, sprinklering, opening protection, penetration sealing, and continuity at floor and roof assemblies can all affect the final compliance path.

Work through it in this order

  1. Confirm the specific suite condition first, such as dwelling units, hotel suites, care or detention uses, mixed-use suites, or a Part 9 secondary-suite scenario.
  2. Review the adopted code's fire-separation provisions for that suite condition, then confirm whether occupancy, sprinklering, building height, or construction type change the applicable requirement.
  3. Check related opening-protection, continuity, and penetration provisions that affect the separation as actually constructed.
  4. Document the cited fire-separation rating, the governing sections, and the project assumptions before finalizing the detail or assembly drawing.

Common questions

Is the fire separation between suites always the same rating?

No. The required rating depends first on the suite condition and governing code path, then on factors such as occupancy, sprinklering, building configuration, and provincial adoption. Different suite conditions in the same building can require different separations.

Why do opening protection and continuity matter if I already know the rating?

Because the fire separation must be maintained at openings, penetrations, and junctions with other assemblies. A correct rating on paper can still fail if these related requirements are not addressed.

Can I use this page for fire separations between occupancies or between buildings?

Not directly. This page is focused on suite-to-suite fire separations. Separations between different occupancies or between buildings typically follow a different code path.