A comprehensive survey provides this information, and the Welsh Building Safety Fund, which is still open for expressions of interest from responsible persons, is supporting this aim.
Mae arolwg cynhwysfawr yn rhoi'r wybodaeth hon, ac mae Cronfa Diogelwch Adeiladau Cymru, sy'n dal ar agor ar gyfer mynegi diddordeb gan bersonau cyfrifol, yn cefnogi'r nod hwn.