Primary references
References checked 5 October 2026. General guidance and code publications do not establish an individual project result.
- Keeping the heat in, section 5: roofs and attics — Natural Resources Canada
Canada: building-envelope education; local requirements differ
Air leakage, insulation and roof-space ventilation interact; roof type and accessible conditions matter.
No universal project vent ratio, retrofit detail, DIY permission or moisture diagnosis is inferred.
- Keeping the heat in, section 4: comprehensive air leakage control — NRCan
Canada: building-envelope education
Air-barrier continuity and leakage paths need coordinated assessment.
No generic sealant location, clearance, combustion-safety decision or installation instruction is supplied.
- Keeping the heat in, section 1: introduction — NRCan
Canada: energy-retrofit planning
Existing hazards and suspect materials require attention before retrofit disturbance.
Appearance and building era do not diagnose hazardous material.
- Addressing moisture and mould in your home — Health Canada
Canada: household health information
Recurring moisture requires investigating its source; a finish or vent count does not establish a cure.
No health diagnosis, exposure threshold, sampling method or clearance is inferred.
- Ventilation and the indoor environment — Health Canada
Canada: indoor-environment information
Living-space ventilation, moisture and air quality have relationships distinct from a simple roof-vent inventory.
No equipment sizing or project airflow is supplied.
- Improve indoor air quality in your home — Health Canada
Canada: household air-quality information
Source control and ventilation belong to the indoor-air context.
No roof-space assessment or universal humidity target is inferred.
- Health risks of asbestos — Health Canada
Canada: health information
Avoid disturbing suspect materials and arrange appropriate professional assessment before work.
No asbestos identification, homeowner sampling procedure or disturbance permission.
- Residential roofing — CCOHS
Canada: occupational safety education; applicable law is jurisdiction-specific
Roof work involves fall, surface, weather and material hazards requiring a task-specific approach.
No safe-height threshold, homeowner roof-access permission or site safety plan is supplied.
- Fall protection: general information — CCOHS
Canada: occupational safety education
Appropriate planning, training and controls depend on the task and site.
Not a substitute for the responsible party's actual access and work plan.
- National Building Code of Canada 2025 — NRC
Canadian national model code; provincial/territorial adoption differs
Distinguish the national model publication from the applicable adopted code.
No universal 1:300 ratio or current local compliance conclusion is supplied.
- Building codes and standards — Government of Alberta
Alberta only
The Alberta code page identifies the current provincial code publication context.
A project's code, scope and authority requirements need confirmation; no national model is assumed adopted automatically.
- Home renovations — Office of Consumer Affairs
Canada: consumer planning overview
Written scope, quote and change records support consumer planning.
No current roof price, contract verdict or uniform provincial legal rule is supplied.
- Renovating for energy efficiency — NRCan
Canada: energy-renovation planning
Coordinate assessment, retrofit objectives and project requirements.
No guaranteed energy savings, grant eligibility or ventilation result.