What Is Continuous Insulation?

Continuous insulation (CI) in Canada is a building practice designed to address thermal bridging—the loss of heat through structural elements like studs or framing—by incorporating a uninterrupted layer of insulation around the exterior or interior of a building. This method plays a critical role in adhering to modern energy codes while enhancing energy efficiency, comfort, and building longevity. 

Key features of continuous insulation in Canada include:

Minimizing Thermal Bridging

Unlike conventional cavity insulation, CI eliminates pathways for heat to escape through structural components, ensuring a consistent thermal barrier throughout the building.

Boosting Energy Efficiency

By significantly reducing heat loss, CI lowers heating and cooling energy demands, leading to lower utility expenses and a smaller environmental footprint.

Enhancing Comfort

Buildings equipped with CI maintain more uniform temperatures, reducing drafts and cold spots, which improves overall comfort for occupants as noted by Construction Canada.

Meeting Building Code Standards

In Canada, regulations like the National Energy Code for Buildings (NECB) and the National Building Code (NBC) increasingly require CI, especially for new constructions and significant renovations.

Improving Durability

CI helps mitigate moisture-related issues such as condensation and mold growth, protecting building materials and ensuring better indoor air quality, according to Construction Canada.

Common CI Materials

Continuous insulation can be implemented using materials such as rigid foam boards (EPS, XPS, and Polyiso), spray foam, or insulated sheathing panels.

Versatile Installation Options

CI may be installed on either the exterior or interior of a building or incorporated directly into the building assembly with systems like insulated concrete forms.

Adaptation to Climate Zones

Canada’s varied climate zones, defined by the NECB, determine the specific R-values (thermal resistance) necessary for insulation. CI often plays a critical role in meeting these regional requirements.

Cost-Effectiveness

Although CI requires an upfront investment, its long-term benefits—including energy savings and increased durability—often outweigh initial costs, making it an economically sound choice, as highlighted by Rockwool.