 Sardo officially transferred to newly promoted Catania in August 2006, and made 12 starts in 17 league appearances in his first season with the club, under then-coach Pasquale Marino.Sardo remained with the club for the 2007–2008 Serie A campaign, and broke into the starting line-up under Silvio Baldini.During the course of the season, the right full back made 22 league appearances for the "rossazzurri", and also scored his first goal for the club.