CHARLESTON, S.C. - A federal judge in South Carolina on March 23 granted a motion to sever filed by construction companies named as third-party defendants in a defective home window class action, noting that the plaintiff's claims are for defective manufacturing, not defective installation (Nadine Johnson, et al. v. M.I. Windows & Doors Inc., No. 2:11-CV-0167, D. S.C.; 2012 U.S. Dist. LEXIS 39811).