Annex M · Multi-unit residential

Multi-unit buildings: assess units, common areas and transfers

A result from one dwelling does not automatically represent the property. Assessment covers common systems, stacks, floors, orientations and complaint histories.

Verify a company Lire en français

Build a defensible sample

Units are selected by floor, stack, orientation, system, complaints and water events.

Representative units
Risk zones
Common areas
Basement and garage
Exclusion rationale

Understand transfers

Shafts, stairs, doors, service voids, garages and pressure differences can move odour, smoke, moisture or contaminants.

Inter-unit pressure
Separation integrity
Corridor ventilation
Dwelling exhaust
Outdoor-air intakes

Manage building-wide findings

The report distinguishes local condition, common cause and unknown extent, then defines investigation and communication.

Complaint register
Priority for vulnerable occupants
Coordinated access
Stack-based correction
Representative verification

RSBQ field guide · Building and operations

Questions a serious file should answer.

Context determines the method. These guideposts help distinguish a structured investigation from a simple collection of results.

What is the actual use?

Occupancy, schedules, vulnerability, processes and sensitive areas determine applicability.

Which systems connect areas?

Air, water, drainage, garages, shafts, elevators and enclosure may transfer contaminants.

Who controls each asset?

Owner, manager, tenant, employer, contractor and professional.

What makes follow-up durable?

Records, maintenance, complaints, trends, construction, re-occupancy and reassessment.

Minimum deliverables

Assignment and assessed areas
Method and conditions
Competence and instruments
Results and observations
Limitations and uncertainty
Decision, correction and follow-up

RSBQ · Québec · Canada

A clear scope. A verifiable status.

Explore the RSBQ accreditation process or verify a published record.

View the process