Envelope Leakage: Why Insulation Alone Cannot Control HVAC Load

The Misunderstood Role of Insulation Thermal insulation resists conductive heat flow through walls, roofs, and floors. By improving the thermal resistance (R-value) and reducing the U-value of building assemblies, insulation limits heat transfer between indoor and outdoor environments. However, insulation does not stop airflow. For HVAC systems, that distinction can be costly. A building may […]