What can result from SPF-based roofing systems being applied in misty or foggy conditions?

Applying SPF (Sprayed Polyurethane Foam) roofing systems in misty or foggy conditions can lead to specific complications due to the presence of moisture in the air. When the SPF is sprayed onto a surface that is not adequately dry, the polyurethane reaction with moisture can cause issues such as blistering of the roof membrane. This occurs because the trapped moisture cannot escape, leading to the formation of blisters as the foam expands and contracts.

In contrast, increased adhesion is not typically a benefit; while moisture is necessary for certain adhesion processes, excess moisture can undermine the effectiveness of the bond. Though some conditions may influence curing time, foggy or misty conditions can actually be detrimental to the curing process by adding too much moisture, thus prolonging it instead of shortening it. The idea that no effects would be expected in such conditions is incorrect, as the environment plays a significant role in the performance and integrity of SPF roofing systems.