Which materials are recommended to be discarded and replaced when damaged by clean water?

The option indicating ceiling tiles, cellulose insulation, fiberglass insulation, and carpeting as materials recommended to be discarded and replaced when damaged by clean water is supported by best practices in water damage restoration.

When materials are exposed to clean water, their capability for recovery often hinges on their porosity and ability to dry properly. Ceiling tiles and cellulose insulation, for example, are highly absorbent, making them more prone to mold growth and deterioration after water exposure, thus necessitating their removal and replacement to ensure a safe environment. Fiberglass insulation can also retain moisture, potentially leading to increased mold risk even if it seems dry, so replacing it is a preventive measure against future issues. Carpeting, similarly, if subjected to water, can harbor mold and bacteria if not properly dried, thus requiring replacement.

In contrast, other materials in the different choices might be more resilient or manageable in the context of water damage, making them less likely to require immediate removal or replacement. For instance, materials that can be properly cleaned and dried or those that are not porous may be salvaged, indicating that they would not fall under the same replacement guideline.