Which moisture-control measure addresses leakage through the building envelope?

• A. Seal water leaks (holes in envelope)
• B. Install new carpet
• C. Increase window area
• D. Paint interior walls

Answer: (A)

Moisture control focuses on the building envelope, the barrier between indoors and outdoors. Leakage through the envelope happens where gaps, holes, or penetrations around walls, roof, doors, and windows allow water to infiltrate. Sealing these water leaks directly stops rainwater and ground moisture from entering the structure, which is the most effective way to reduce dampness, mold risk, and potential damage. The other options don’t address the source of moisture intrusion: adding carpet doesn’t stop external water coming in, increasing window area can create more leakage points, and painting interior walls doesn’t prevent water from entering or condensing inside. Sealing holes in the envelope is the best moisture-control measure for leakage through the building envelope.