Sulfur gases emitted from toxic Chinese drywall have been found to cause corrosion of metals in close proximity.  Oxidation occurs mainly in copper wiring, copper plumbing, air-conditioning machinery/ducting.  The sulfur gasses can damage carpet, clothes, furniture, and other fabrics as well.  Personal items such as jewelry, electronic devices, and appliances have also been reportedly damaged by the sulfur-emitting drywall.  Once personal belongings/building materials have been damaged by toxic drywall they must be replaced.

The drywall was manufactured with a high content of gypsum, a naturally occurring mineral.  According to a spokeswoman for the drywall manufacturer Knauf Plasterboard Tianjin Co., a subsidiary of Knauf International GmbH, the company has traced some of their toxic drywall to a mine in the Shandong province of China.

Knauf Tianjin continues to cooperate with United States officials on resolving the matter.  However, they feel that they are being singled-out for acknowledging the problem while other manufacturers have not.

The United States imported around 309 million square ft. of drywall from China during a construction boom from 2004- 2007 caused by successive hurricanes and increased demand for housing.  309 million square ft. is only enough material to build around 35,000 homes however, many more are expected to contain the toxic drywall.  A lot of homes are built using material from a number of suppliers, making the exact number of homes containing toxic drywall is difficult to predict.  One major difficulty in finding the bad drywall is that it is often unclearly labeled or that the label has been damaged during installation, making it harder to identify the manufacturer.


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