Ar hyn o bryd dim ond pum ysgol sydd wedi cael eu nodi fel rhai sy'n cynnwys RAAC: dwy ysgol ar Ynys Môn, un yng Nghonwy, un yn Sir Ddinbych ac un yng Nghasnewydd. Roedd yr awdurdodau lleol yn yr achosion hyn wedi trefnu i beirianwyr adeiladu gynnal arolwg o'r ysgolion hynny ar frys – a phenodi contractwyr i wneud gwaith lliniaru.
Currently, only five schools have been identified as containing RAAC – two schools on Anglesey, one in Conwy, one in Denbighshire and one in Newport. The local authorities in these instances have arranged for structural engineers to urgently survey and assess the schools and appoint contractors to carry out mitigation works.