Red Seal Lather (Interior Systems Mechanic) Practice Exam

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What should be done if drywall is installed in a high moisture area?

  1. Use standard drywall

  2. Skip installation

  3. Use moisture-resistant materials

  4. Install without ventilation

The correct answer is: Use moisture-resistant materials

In high moisture areas, such as bathrooms or kitchens, using moisture-resistant materials is essential to prevent damage and maintain the integrity of the construction. These materials, often referred to as green board or moisture-resistant drywall, are specifically designed to withstand humidity and moisture, reducing the risk of mold growth and degradation that can occur with standard drywall. Standard drywall is porous and can easily absorb moisture, leading to potential issues in wet environments. Skipping installation altogether would not be a viable option, as the wall surface still needs to be finished for aesthetic and functional purposes. Installing without proper ventilation would further exacerbate humidity issues, potentially leading to more severe damage over time. Therefore, using moisture-resistant materials is the appropriate action to take in such conditions, ensuring durability and longevity in the installed drywall.