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One document based on assessment conducted at West Suffolk Hospital in April warned of a 'catastrophic' and 'likely' risk of potential failure of the main building.
Dame Meg Hillier, chair of the public accounts committee, said the problems that have forced more than 100 schools to shut classrooms over safety fears are just the 'tip of the iceberg'
More than 100 schools and colleges in England have been told to close buildings made with a type of concrete that is prone to collapse - just days before term restarts next week.
RAAC is a cheap, lightweight, 'bubbly' material that was used in construction between the 1950s and 1990s, when a report found structural deficiencies mean it only has a lifespan of around 30 years. It was mostly used for flat roofs - but also in walls and floors.
Schools minister Nick Gibb (pictured) attempted to calm worries as he said: 'Parents can be assured that if they haven't heard from schools, that it is safe to send their children into school.'