Why Shops and Garages Are So Difficult to Heat

Unlike most homes, shops and garages are typically large, open spaces with high ceilings. This creates a phenomenon known as heat stratification. 

Warm air naturally rises. In a building with a 16-foot, 20-foot or even 30-foot ceiling, a significant portion of the heated air can accumulate overhead while the occupied space near the floor remains much cooler. The thermostat may indicate that the building is warm, but people working at ground level often experience a very different reality. 

Large overhead doors compound the issue. Every time a door opens, a substantial volume of conditioned air can be exchanged with cold outdoor air. During winter, this repeated air exchange places additional demands on the heating system. 

Steel Buildings Lose Heat in a Specific Way 

Many northern Alberta shops use steel-frame construction because it is durable, cost-effective and quick to erect. However, steel is an excellent conductor of heat. 

Without proper insulation design, heat can move through structural components and escape through the building envelope. This process, known as thermal bridging, allows heat to bypass the insulation layer entirely. 

In practical terms, a building may contain adequate insulation on paper while still experiencing significant heat loss through framing members and structural connections. This is one reason why building performance cannot be evaluated based solely on insulation thickness. 

Air Leakage Often Costs More Than People Realize 

One of the biggest contributors to heat loss in shops and garages is uncontrolled air movement. Small gaps around overhead doors, wall penetrations, roof assemblies and service openings can allow large volumes of heated air to escape. At the same time, cold outdoor air is drawn into the building to replace it. 

In northern Alberta, where winter temperatures can remain below freezing for extended periods, this air leakage can significantly increase heating costs. 

Many building owners focus on adding more insulation while overlooking the fact that air sealing may provide a greater improvement in overall performance. 

Moisture Can Affect Comfort and Performance 

Heating challenges are often connected to moisture management. Warm indoor air naturally contains moisture. When that air encounters cold surfaces, condensation can form. Over time, this can contribute to corrosion, material deterioration and reduced insulation effectiveness. 

This issue becomes particularly noticeable in shops where vehicles, equipment or snow-covered machinery are regularly brought indoors during winter. A well-insulated and properly sealed building envelope helps maintain more consistent surface temperatures, reducing the likelihood of condensation-related problems. 

Why Spray Foam Performs Well in Shops and Garages 

Spray foam insulation addresses several common challenges simultaneously. Unlike traditional insulation materials that primarily slow heat transfer, spray foam also helps reduce uncontrolled air movement. By creating a continuous insulated and air-sealed building envelope, it helps maintain more stable indoor temperatures throughout the year. 

This is particularly valuable in shops with complex framing, multiple penetrations or large roof and wall surfaces. Spray foam conforms to irregular shapes and hard-to-reach areas, helping eliminate many of the gaps where heat loss typically occurs. 

The result is often a building that feels more comfortable, responds more effectively to heating systems and experiences fewer temperature fluctuations during cold weather. 

At Fusion Foam, we help property owners improve the performance of shops, garages and other outbuildings throughout northern Alberta. Whether you are constructing a new building or upgrading an existing one, our team can recommend insulation solutions tailored to your needs. 

Contact Fusion Foam today to learn how installing spray foam insulation can help create a warmer, more efficient shop or garage.