Faulty concrete is likely to have been used in some schools and other buildings in Wales, an expert claims.
The UK government has told more than 100 school, college and nursery buildings in England to shut.
Powers over infrastructure are devolved in Wales, but construction expert Keith Jones said contractors may not have recognised this boundary.
The Welsh government started surveying all state-funded schools and colleges in May.
However, it said no councils or colleges have reported any instances of the use of lightweight reinforced autoclaved aerated concrete (RAAC), which was commonly used from the 1960s to the 1990s.
