What should be the focus of the first step in SFRM patching?

The focus of the first step in Spray-Applied Fire-Resistant Material (SFRM) patching should be on cleaning the irregularity area. This is crucial because preparing the surface ensures that the patch adheres properly to the underlying material, which is vital for the effectiveness of the fireproofing. Any dust, debris, or contaminants on the surface can impede adhesion and compromise the performance of the newly applied material. Cleaning the area not only enhances the bond but also promotes uniform thickness of the patch, which is essential for maintaining fire-resistance ratings.

While selecting a patching tool, choosing compatible materials, and measuring patch size are important considerations that come next in the patching process, they are secondary to ensuring that the surface is adequately prepared for the application. Properly addressing the cleaning aspect sets a solid foundation for the subsequent steps, ultimately contributing to the integrity and reliability of the fire-resistive system.