Why is surface preparation important before spray fireproofing?

Surface preparation is crucial before applying spray fireproofing because it ensures proper adhesion and performance of the fireproofing material. Good surface preparation involves removing contaminants such as dirt, grease, and dust, as these can prevent the fireproofing material from bonding effectively to the substrate. When the surface is clean and properly prepared, the spray-applied fireproofing adheres better, resulting in a more durable and effective fire-resistive barrier. This enhanced adhesion helps to achieve the intended fire performance rating and extends the lifespan of the fireproofing material, ultimately ensuring safety in the event of a fire.

Inadequate surface preparation could lead to failures in the fire protection system, such as peeling or flaking, which can compromise the structural integrity and fire safety of the building. Therefore, adhering to best practices for surface preparation before the application of fireproofing is essential for both functional and safety reasons.