Lawsuits over tainted Chinese drywall number approximately 150, and more are being filed almost daily, according to federal court records. The cases, which are being consolidated in a New Orleans federal court, involve drywall imported from China that is tainted with sulfur gases. Drywall, a product sometimes called Sheetrock, gypsum board and wallboard, is the main material used for the construction of ceilings and interior walls in U.S. homes. The sulphur-tainted Chinese drywall can cause a rotten egg-like odor and can both damage the home and cause health effects.

Testing by national experts has confirmed that the substance can cause copper, such as that used in electrical wiring, to turn black and corrode. It can also damage such mechanical systems as refrigerators, air conditioning coils, plumbing, computer wiring, and metal surfaces such as home appliances. Alleged health effects include allergies and sinus and respiratory problems.

Defendants are companies involved in the manufacturing, sale, distribution and marketing of the products, including German building materials manufacturer Knauf Gips; Knauf Plasterboard (Tianjin) Co.; and Knauf Plsterboard (Wuhu) Co.

For the full story, go to the Clarion Ledger.