Red Seal Drywall Finisher and Plasterer Practice Exam

What is the correct procedure if you encounter mold on drywall?

1. Leave it as is, as it will dry out

2. Paint over it to seal it

3. Remove and replace affected areas and treat the underlying issue

4. Clean with bleach and let it dry

The correct answer is: Remove and replace affected areas and treat the underlying issue

When mold is discovered on drywall, the correct procedure is to remove and replace the affected areas while also addressing the underlying issue that caused the mold growth in the first place. Mold thrive in damp, humid conditions, and simply removing visible mold does not solve the problem if the moisture source is not treated. Removing and replacing the affected areas ensures that any mold spores embedded in the drywall are eliminated, preventing potential health risks and further damage to the structure. Additionally, addressing the root cause—whether it be a leak, inadequate ventilation, or high humidity—helps prevent future occurrences of mold growth. The approach of just leaving it alone, painting over it, or cleaning with bleach may provide a temporary solution but fails to address the core problem. Such methods could allow mold to continue growing behind the surface, potentially worsening over time and leading to more severe structural issues and health concerns.