Red Seal Drywall Finisher and Plasterer Practice Exam

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Which component can contribute to soundproofing in drywall systems?

  1. Standard drywall

  2. Sound-dampening drywall or acoustic barriers

  3. Moisture-resistant drywall

  4. Regular joint compound

The correct answer is: Sound-dampening drywall or acoustic barriers

Sound-dampening drywall or acoustic barriers are specifically designed to reduce sound transmission between rooms, making them an effective choice for soundproofing in drywall systems. These materials typically incorporate added mass and specialized core compositions to absorb and block sound waves better than standard drywall. This enhanced performance stems from their ability to minimize vibrations and resonance, which are critical factors in soundproofing. Standard drywall, though effective for typical wall applications, does not provide the same level of sound attenuation as sound-dampening options. Moisture-resistant drywall serves a different purpose, focusing on preventing damage from humidity rather than soundproofing. Regular joint compound is primarily used for finishing seams and is not designed to impact sound transmission significantly. Therefore, the use of sound-dampening drywall or acoustic barriers is the preferred approach for achieving better sound isolation in drywall installations.

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