Reinforced Autoclaved Aerated Concrete or Raac is a lightweight alternative to standard concrete that was used mostly in flat roofing but also in floors and walls across buildings during the 1950s to 1990s.<br /><br />But in the past few years, Raac has failed in a number of settings meaning schools have to urgently fix buildings where it is present, causing widespread disruption and a political blame game. In this Decomplicated, we look at what Raac is and how big the problem facing public buildings is.<br /><br />Watch Decomplicated on Independent TV, across desktop, mobile and connected TV.
