14 Sep 2023
Reinforced Autoclaved Aerated Concrete (RAAC) and concrete: the differences
Reinforced autoclaved aerated concrete (RAAC) planks derive their structural strength from metal reinforcing bars and this reinforcement needs to be protected from water ingress. Where RAAC planks have been exposed to water over a prolonged period of time corrosion weakens the bars and hence the planks.
Concrete and aircrete products are not susceptible to the failures being seen in RAAC products manufactured from the 1950s to the 1980s.