Failure of RAAC Roof Planks

RAAC roof planks

Reinforced Autoclaved Aerated Concrete roof planks (RAAC), were widely used in flat roof construction between the 1960’s to 1980’s. Unfortunately, the methods employed to construct these planks resulted in a relatively weak structure. One with a low capacity for developing a bond with embedded reinforcement. Recent roof failures have identified rusting of this embedded reinforcement and cracking of the planks. … Read More