Indoor and outdoor air cleaning through cement and ceramics modified by TiO2 is the leitmotif of this Chapter. Paving blocks, cement and ceramics modified by TiO2 are described with all their practical applications. The main commercial photocatalytic cements are compared with all their performance in self-cleaning. Commercial ceramic tiles are presented in indoor and outdoor applications. Composite materials and eco-sustainable houses integrating photocatalytic materials are finally presented.