(February 7, 2019, 12:54 PM EST) -- CHARLOTTE, N.C. — Two North Carolina homeowners on Jan. 18 filed a class action lawsuit accusing the maker of cement fiber siding of selling and marketing a defective product that is manufactured using excessive amounts of fly ash that allows for water absorption, leading to premature cracking and splitting before the expiration of the product’s advertised 50-year lifespan (Martha P. Carbonara, et al. v. Allura USA LLC, et al., No. 19cv29, W.D. N.C.)....