What is the main reason floor-to-wall (FW) systems are not suitable for curtain walls?

The main reason floor-to-wall (FW) systems are not suitable for curtain walls is related to how they are tested differently than curtain wall systems. Curtain walls are specifically designed to accommodate the unique structural and thermal loading conditions associated with their installation. They must be tested for performance in terms of air and water infiltration, structural integrity under wind loads, and thermal efficiency, among other factors.

In contrast, floor-to-wall systems may not be assessed under the same rigorous standards applicable to curtain walls, leading to performance differences that can affect the overall building envelope. The distinct testing procedures are significant because they ensure that curtain walls can effectively manage the demands placed on them as non-structural elements that protect against environmental factors while providing aesthetic value.

Understanding this difference in testing validity highlights the critical nature of performance criteria for these systems, ensuring safety and reliability in construction practices.