Detailed records will be taken before, during and after the works to help Cadw get the best possible understanding of the history of the castle and how it evolved over time.
Caiff cofnodion manwl eu cymryd cyn, yn ystod ac ar ôl y gwaith er mwyn helpu Cadw ddeall hanes y castell cystal â phosibl a sut yr esblygodd dros amser.