Environmental health issue involving defective drywall manufactured in China
"Chinese drywall" refers to an environmental health issue involving defective drywall manufactured in China, imported to the United States and used in residential construction between 2001 and 2009 – affecting "an estimated 100,000 homes in more than 20 states".[1]
In samples of contaminated drywall, laboratory tests will detect off-gassing of volatile chemicals and sulfurous gases — including carbon disulfide, carbonyl sulfide, and hydrogen sulfide. The emissions worsen as temperature and humidity rise, will give off a sulfuric (rotten egg) odor and will cause copper surfaces to turn black and powdery, a chemical process indicative of a hydrogen sulfide reaction and an early indication of contaminated drywall. Copper pipes, electrical wiring, and air conditioner coils are affected, as well as silver jewelry.
Homeowners have reported health symptoms including respiratory problems such as asthma attacks, chronic coughing and difficulty breathing, as well as chronic headaches and sinus issues.[2][3][4]
The copper coils on this air conditioner unit are blackened and corroded.
^Greg Allen (October 27, 2009). "Toxic Chinese Drywall Creates A Housing Disaster". National Public Radio.
^"Wallboard Woes | Science & Technology | Chemical & Engineering News". Pubs.acs.org. May 4, 2009. Retrieved February 23, 2012.
^"Imported Drywall and Health - A Guide for Healthcare Providers" (PDF). Archived from the original (PDF) on September 10, 2016. Retrieved July 21, 2015.
^"Imported Drywall and Health - A Guide for Healthcare Providers". Centers for Disease Control and Prevention. March 3, 2011. Retrieved March 24, 2013.
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