Uninsulated attics are among the main sources of heat loss in Canadian homes. This section documents assessment methods, available materials, and areas to watch.
Recent articles
Practical information on attic insulation suited to Canada’s climate.
Assessment
Signs of insufficient insulation: temperature swings, moisture intrusion, and higher heating use.
Materials
Overview of common products: mineral wool, cellulose, polyurethane foam, and rigid panels.
Heat loss
Critical zones: attic floors, wall–roof junctions, access hatches, and penetrations.
Canadian context
Canadian winters place strict demands on building envelopes. Attics sit between living space and the roof covering, making them a major zone of heat exchange. Poor insulation leads to ongoing heat loss in cold weather and overheating in summer.
The National Building Code of Canada and provincial codes set minimum thermal resistance (RSI) values that vary by climate zone. Homes built before the 1980s rarely meet today’s thresholds.
Documentary approach
This site brings together descriptive information on attic insulation in Canadian detached homes. Content draws on recognized public sources, including publications from Natural Resources Canada, the Canada Mortgage and Housing Corporation (CMHC), and provincial construction associations.
Articles address assessing existing conditions, properties of common materials, and locating thermal leakage zones. No commercial recommendations are made.
Information on this site is general and for reference only. It does not replace a professional inspection or a certified energy evaluation. For any renovation project, consult a qualified professional and confirm applicable regulatory requirements in your province.