What condition could compromise the effectiveness of SFRM?

Moisture presence can significantly compromise the effectiveness of Spray-Applied Fire-Resistive Material (SFRM). When moisture is present during or after the application of SFRM, it can negatively affect the bonding properties of the material to the substrate. If SFRM is applied in an environment with high humidity or there is moisture on the surface being treated, it may not adhere properly, which can lead to delamination or failure of the fireproofing layer. Additionally, trapped moisture can create issues such as mold growth and degradation of the fire-resistive properties over time.

Understanding the impact of moisture underscores the importance of proper site conditions for the application of fireproofing materials to ensure their intended performance and longevity in protecting structural integrity during a fire event.