An Alabama lawsuit against National Gypsum was dismissed in October, the company announced. The suit claimed the manufacturer’s drywall exhibited the same characteristics as defective Chinese wallboard. Marshall County, Alabama Circuit Court Judge Tim Jolley entered an order dismissing the case, Clark vs. National Gypsum, et. al., “with prejudice”-meaning the plaintiffs are barred from bringing the same claim against the company.

“This result is yet another confirmation of the quality and safety of our products and another blow to those making baseless claims against our company,” said Craig Weisbruch, senior vice president of Sales & Marketing. “All National Gypsum wallboard has passed the industry’s most rigorous testing and certification processes for indoor air quality and has been used by the U.S. Green Building Council in its buildings.”

The dismissal of the Alabama lawsuit follows another development in 2011: In April, a federal judge in Arizona dismissed a putative national class action against National Gypsum alleging that the company manufactured defective drywall that emitted high levels of sulfur, damaged property inside homes and caused health symptoms. These problems have typically been associated with defective Chinese drywall, not domestic drywall. The plaintiff did not produce any credible scientific evidence that could substantiate his allegations.

“All credible scientific evidence-including studies by the federal government’s leading safety experts-has led to the same conclusion,” said Weisbruch. “National Gypsum wallboard does not pose the issues associated with defective Chinese drywall.”