When designing high-performance buildings in the Canadian Prairies – or anywhere in North America – the conversation often starts with R-values. But in reality, how insulation is installed is just as important as how much is installed.
The most effective way to improve real-world performance is through continuous exterior insulation, which addresses two of the biggest challenges in building science:
- Thermal bridging
- Dew point and condensation control
The Problem With Traditional Insulation
In conventional construction, insulation is typically placed between wood or steel studs. While this may meet code requirements on paper, it creates a major performance gap in practice.
Why? Because framing members act as thermal bridges, allowing heat to bypass the insulation layer:
- Wood studs and plates make up a significant portion of the wall
- These materials have a much lower insulating value than the insulation itself
- The result is reduced real-world performance and energy loss
This is why many buildings never achieve their intended efficiency, despite meeting nominal insulation targets.
How Exterior Insulation Solves Thermal Bridging
By placing insulation continuously on the exterior, systems like Quik-Therm wrap the building in a seamless thermal layer – similar to putting a parka around the entire structure.
This approach:
- Eliminates thermal bridging through studs and framing
- Ensures insulation performs as intended
- Creates a more consistent and comfortable indoor environment
The result is not just better efficiency, but also improved durability and occupant comfort.
Solving The Dew Point Problem
One of the most critical (and often overlooked) aspects of wall design is where the dew point occurs.
In cold climates, large temperature differences between inside and outside can cause condensation to form inside wall cavities – leading to:
- Mould growth
- Material degradation
- Long-term structural issues
The Role Of Exterior Insulation
Adding exterior insulation shifts the dew point outward, away from the framing and into the insulation layer, where it can be safely managed.
- Minimum ~2” exterior insulation: Begins to significantly reduce condensation risk.
- 3”-4”+ in colder climates: Provides even greater protection and reliability.
This keeps the interior structure warm and dry, dramatically improving the longevity of the building.
The Simplest Approach: Go Fully Exterior
While hybrid systems (cavity + exterior insulation) can be effective, the most straightforward way to eliminate both thermal bridging and dew point concerns is to use all exterior continuous insulation.
Benefits include:
- No thermal bridges through framing
- Full control of condensation risk
- Simplified wall assemblies
- Consistent, predictable performance
This approach is especially valuable in extreme climates like the Prairies, where temperature swings can be severe.
Additional Performance Benefits
Air & Vapour Control
Quik-Therm systems incorporate perforated polymer facers that provide both air control and vapour management when properly sealed, helping reduce uncontrolled air leakage – a major source of heat loss.
Comfort & Durability
By eliminating cold spots and condensation risks, buildings become:
- More comfortable year-round
- Less prone to moisture-related failures
- More durable over time
Faster Installation
With integrated components like embedded furring strips, Quik-Therm systems reduce installation steps and speed up construction – an important advantage during short Prairie building seasons.
Building Smarter In Any Climate
Whether you’re building in Winnipeg, Calgary, or Northern communities, the principles remain the same:
- Control thermal bridging with continuous exterior insulation
- Manage the dew point by keeping the structure warm and dry
- Simplify assemblies for better performance and faster installation
By focusing on these fundamentals – not just R-values – you can achieve buildings that are more efficient, more durable, and better suited to real-world conditions.
