During a heavy rainstorm, water is penetrating through a newly constructed wall system. The most likely cause is inadequate:
Correct Answer
B) Weather barrier installation
Water penetration during storms typically indicates problems with the weather barrier system, including house wrap, flashing, or sealants. These components form the primary defense against water intrusion.
Why This Is the Correct Answer
Weather barrier installation is the primary defense system against water penetration in wall assemblies. This includes house wrap, building paper, flashing around openings, and proper sealant application at joints and penetrations. When water penetrates during rainstorms, it indicates these moisture management components have failed or were improperly installed. The weather barrier system is specifically designed to shed water and prevent it from entering the wall cavity.
Why the Other Options Are Wrong
Option A: Electrical grounding
Structural support relates to the load-bearing capacity of the wall system and has no direct relationship to water penetration. Inadequate structural support would manifest as sagging, cracking, or failure under load, not water intrusion during storms.
Option C: Structural support
Electrical grounding is a safety system that protects against electrical shock and has no relationship to water penetration through wall systems. Grounding issues would create electrical hazards, not moisture problems.
Memory Technique
Remember 'WBS' - Weather Barrier Stops water penetration. Think of weather barriers as the building's raincoat that keeps moisture out.
Reference Hint
Florida Building Code, Chapter 14 - Exterior Walls, and Chapter 15 - Roof Assemblies and Rooftop Structures for weather barrier requirements
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