Cement wallboards and methods for their preparation are disclosed. The wallboards comprise two scrim layers and one mat layer. The wallboards have a smooth surface, are strong, lightweight, and easy to score and snap. Tiles can be readily adhered to the boards. The wallboards can be used in general commercial...http://www.google.com/patents/US20040209060?utm_source=gb-gplus-sharePatent US20040209060 - WALLBOARD CONTAINING SCRIM AND MATT
