Texas Mold Assessment Consultant Practice Exam

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What should be done to cellulose insulation if clean water damage has occurred within 24 to 48 hours?

Keep it and dry it
Discard it and replace it
Use a chemical to treat it
Inspect it for mold growth

The correct answer is: Discard it and replace it

When cellulose insulation has been exposed to clean water damage within a timeframe of 24 to 48 hours, the most appropriate action is to discard it and replace it. This is due to the hygroscopic nature of cellulose, which means it readily absorbs moisture. Even clean water can lead to conditions conducive to mold growth, especially after the insulation is wet for a period. Once cellulose insulation retains moisture, drying it out effectively can be extremely difficult, and it may take longer than expected for the material to return to a safe moisture level. Furthermore, the presence of cellulose material can provide a food source for mold, which can proliferate rapidly in damp conditions. Therefore, replacement is often necessary to ensure the safety and integrity of the building's structure and indoor air quality. While inspecting for mold growth is important in an overall assessment of the situation, relying on inspection alone does not address the potential risks associated with compromised insulation. Clean water damage, if unaddressed, can lead to significant issues down the line, making the decision to discard the affected insulation the most prudent choice.