Why is it important to check for pinholes or voids during a spray-applied fireproofing inspection?

The importance of checking for pinholes or voids during a spray-applied fireproofing inspection primarily relates to their impact on fire resistance and overall structural protection. Pinholes and voids in the fireproofing material can compromise its effectiveness by creating gaps that may not adequately insulate the underlying structure from heat during a fire. This lack of coverage can reduce the fire resistance rating, potentially allowing temperatures to rise to critical levels more quickly than if the fireproofing material were intact.

Additionally, these defects might also increase the risk of structural failure during a fire event, as the unprotected areas become exposed. Ensuring that the fireproofing is uniform and free from such imperfections is crucial for maintaining the intended level of safety and compliance with building codes and regulations. Proper application technique and aesthetics are certainly important, but the primary concern during an inspection is the performance of the fireproofing material in a fire scenario.