BATON ROUGE, La. - Homeowners' allegations of damages from Chinese drywall are not covered under their insurance policy because the drywall is defective and the drywall's off-gassing is both corrosive and a pollutant, a Louisiana federal judge ruled March 9, finding that the policy's defective building material, latent defect, pollutant and corrosion damage exclusions apply (Cullen J. Dupuy and Mary E. Dupuy v. USAA Casualty Insurance Co., No. 11-336, M.D. La.; 2012 U.S. Dist. LEXIS 31890).