.IN THE COURSE OF A EUROPEAN structure boom that started in the 1960s, an unfamiliar form of building and construction product began to be made use of. Improved autoclaved oxygenated concrete, called RAAC, is actually pre-cast in a manufacturing facility, typically right into slabs, before being taken to a construction website where it could be promptly put together right into component of a structure. Although RAAC is actually still used in many component of the planet, Britain is having particular concerns from it. In some properties the product is actually crumbling in 2018 it triggered an institution roofing system to crash. An amount of universities have been shut and also various other buildings, including health centers, are influenced. This is actually leading to problem amongst the public as well as a political migraine for the government. What is actually RAAC, and why performs it end up being risky?