What’s in the new RAAC Playbook?

RAAC is the reinforced version of autoclaved aerated concrete (AAC). The lightweight cementitious material is ‘bubbly’ in appearance and typically reinforced by steel bars or mesh to enhance its structural strength.

RAAC planks were widely used in construction across the UK from the 1950s until the mid-1990s in roofs, floors and walls of buildings such as schools, hospitals and housing. RAAC manufacturing is believed to have ended in 1982 in the UK.

Image: RAAC plank showing ineffective bonding