Radon, a radioactive gas from soil, accumulates in homes, particularly in crawl spaces. Ventilatingthe crawl space (e.g., with fans or vents) disperses radon before it enters living areas, per EPA guidelines. Depressurization (B) is a mitigation technique (sub-slab suction), but it’s more complex and not the primary recommendation here. Sealing basement windows (C) traps radon inside. Expansion joints (D) address structural movement, not air quality. Ventilation (A) is the simplest, most effective initial step.
Verified Answer from Official Source:A - crawl space is ventilated
"Ventilating the crawl space is recommended to reduce radon levels in a home by preventing gas buildup." (NCIDQ IDPX Study Guide, Section 2: Building Systems)
Explanation from Official Source:The NCIDQ aligns with EPA radon mitigation, noting crawl space ventilation as a practical, designer-accessible solution for indoor air quality.
Objectives:
Enhance indoor air quality (IDPX Objective 2.5).
[References:NCIDQ IDPX Study Guide, Chapter 2: Building Systems and Integration; EPA Radon Mitigation Standards., ]
Contribute your Thoughts:
Chosen Answer:
This is a voting comment (?). You can switch to a simple comment. It is better to Upvote an existing comment if you don't have anything to add.
Submit