Mae'r corff helaeth hwn o waith yn mynd rhagddo'n dda ac mae wedi arwain at nodi nifer fechan o eiddo sy'n cael eu rhedeg gan Trivallis yn ardal Hirwaun lle mae RAAC yn bresennol. Mae arolygon arbenigol o ddau o'r eiddo hyn wedi nodi bod angen cymryd camau adfer o fewn chwe mis a'r potensial y bydd angen gwaith o'r fath mewn 38 eiddo arall gyda'r un dyluniad. Mae 20 o gartrefi ymhellach sy’n eiddio i Trivallis a 17 o gartrefi eraill sy'n eiddo i berchen-feddianwyr hefyd wedi cael eu nodi fel rhai a RAAC, pedwar o'r un dyluniad a dull adeiladu.
This extensive body of work is progressing well and has resulted in the identification of a small number of Trivallis-run properties in the Hirwaun area where RAAC is present. Specialist surveys of two of these properties has identified remedial action needs to be carried out within six months and the potential for such work to be needed in a further 38 Trivallis properties with the same design. A further 20 Trivallis owned properties and 17 owner-occupied homes have also been identified as having RAAC, of which four are of the same design and construction.