Massachusetts Plumbers Journeyman Practice Exam

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For vent terminal flashing, what is the minimum thickness of Sheet Lead required?

  1. 2 pounds per square foot

  2. 3 pounds per square foot

  3. 4 pounds per square foot

  4. 5 pounds per square foot

The correct answer is: 3 pounds per square foot

The minimum thickness of sheet lead required for vent terminal flashing is indeed 3 pounds per square foot. This specification is set to ensure that the material is durable enough to withstand environmental stressors such as wind, rain, and snow while providing a reliable barrier to prevent water intrusion around vent terminals. Using lead flashing of this specified thickness helps maintain the integrity of the vent system and contributes to the longevity of both the vent and the surrounding structure. Thicker variations might offer additional robustness but are not the minimum requirement as per building codes and industry standards. Therefore, choosing 3 pounds per square foot strikes the right balance between performance and compliance with safety regulations.

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