CSLB Class B General Contractor's License Practice Exam

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Prepare for the CSLB Class B General Contractor's License Test with interactive flashcards and multiple choice questions. Each question offers hints and explanations to enhance your understanding and readiness for the exam.

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In relation to venting, what is the primary function of roof sheathing?

Provide structural support
Enhance ventilation
Insulate the attic
Protect against water intrusion

The correct answer is: Protect against water intrusion

The primary function of roof sheathing is to provide a solid substrate for the roofing material and to protect the underlying structure from water intrusion. Roof sheathing, which typically consists of plywood, oriented strand board (OSB), or similar materials, acts as a barrier that helps prevent rain, snow, and moisture from penetrating the home. By directing water away from the insulation and living spaces below, roof sheathing plays a crucial role in maintaining the integrity of the building and preventing damage due to leaks or mold growth. While sheathing does contribute to structural support, enhance ventilation indirectly, and provide some insulation, its main purpose is to serve as a reliable defense against water intrusion, ensuring the longevity and safety of the roofing system and the home overall.