Which of the following best describes patching requirements for SFRM on a project?

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Multiple Choice

Which of the following best describes patching requirements for SFRM on a project?

When patching SFRM, keep the fireproofing system homogeneous by using the same SFRM material that was originally applied. This maintains a continuous protective layer with the same bond, thickness, density, texture, and thermal behavior, which are all critical to preserving the intended fire rating. Using a different patch material—whether cementitious or epoxy—introduces dissimilar properties such as different bonding strength, cure time, expansion, and moisture behavior, which can lead to cracking, delamination, or gaps that compromise the rating. Metal mesh reinforcement isn’t a patching substitute for restoring the fire-resistive layer. Follow the original manufacturer’s patching guidelines to restore the surface to the required thickness and performance.

When patching SFRM, keep the fireproofing system homogeneous by using the same SFRM material that was originally applied. This maintains a continuous protective layer with the same bond, thickness, density, texture, and thermal behavior, which are all critical to preserving the intended fire rating. Using a different patch material—whether cementitious or epoxy—introduces dissimilar properties such as different bonding strength, cure time, expansion, and moisture behavior, which can lead to cracking, delamination, or gaps that compromise the rating. Metal mesh reinforcement isn’t a patching substitute for restoring the fire-resistive layer. Follow the original manufacturer’s patching guidelines to restore the surface to the required thickness and performance.

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