To maintain measurement accuracy, what is the ambient condition for SFRM samples?

To maintain measurement accuracy for Spray-Applied Fire-Resistant Materials (SFRM) samples, it is essential to consider the ambient conditions, particularly humidity. A humidity level of 60% is often considered optimal because it strikes a balance that helps in preventing excessive moisture absorption by the SFRM, which can affect the material properties and ultimately influence test outcomes.

At this level of humidity, the material can accurately reflect its performance characteristics as it would in intended use conditions. Higher or lower humidity levels may result in either premature drying or excessive moisture retention, both of which would skew the results related to density, adhesion, and other critical performance metrics of the fireproofing material. This control over environmental conditions is crucial in ensuring that testing results are reliable and reproducible.